CN110983137A - High-damping magnesium-lithium alloy with enhanced twin crystals in long-period stacking ordered phase and preparation method thereof - Google Patents
High-damping magnesium-lithium alloy with enhanced twin crystals in long-period stacking ordered phase and preparation method thereof Download PDFInfo
- Publication number
- CN110983137A CN110983137A CN201911408002.3A CN201911408002A CN110983137A CN 110983137 A CN110983137 A CN 110983137A CN 201911408002 A CN201911408002 A CN 201911408002A CN 110983137 A CN110983137 A CN 110983137A
- Authority
- CN
- China
- Prior art keywords
- alloy
- magnesium
- damping
- heat treatment
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Abstract
The invention relates to a high-damping magnesium-lithium alloy reinforced by twin crystals in a long-period stacking ordered phase and a preparation method thereof, wherein the high-damping magnesium-lithium alloy comprises the following components in percentage by mass: 8.0% of Li, 4.0% of Y, 2.0% of Er, 2.0% of Zn, 0.6% of Zr and the balance of magnesium, and smelting: carrying out alloy smelting on the raw materials in a high-vacuum electromagnetic induction smelting furnace, and preparing cubic block as-cast alloy by furnace cooling; and (3) heat treatment: carrying out heat treatment on the alloy obtained by casting at the temperature of 450 ℃ for 6h, and cooling by adopting a furnace cooling method at the cooling speed of 0.4 ℃/min; rolling: the sample obtained by the heat treatment is subjected to cold rolling at room temperature, the total pressing amount is 50%, and the pressing amount is 25% in a single pass. The invention improves the mechanical property and the damping property of the alloy, realizes the LPSO and twin crystal synergistic improvement of the damping property and the mechanical property, and obtains the ultralight magnesium-lithium alloy material with high mechanical property and damping property.
Description
Technical Field
The invention relates to a magnesium-lithium alloy and a preparation method thereof, in particular to a high-damping magnesium-lithium alloy with enhanced twin crystals in a long-period stacking ordered phase and a preparation method thereof.
Background
With the continuous development of aerospace, transportation and 3C products, the requirements on the lightweight and vibration and noise reduction performance of alloy materials are gradually improved, and magnesium alloy becomes one of the most promising light alloy materials due to the characteristics of low density and good damping performance. The magnesium-lithium alloy is a metal structure material with the minimum density so far, and the addition of lithium element in the alloy changes the crystal structure of the alloy. The body-centered cubic structure changes the damping mechanism of the magnesium-lithium alloy, and effectively improves the processing performance of the alloy, thereby having wider application prospect. However, the practical application of the magnesium-lithium alloy is limited due to the incompatible contradiction between the strength and the damping performance of the magnesium-lithium alloy. Therefore, people begin to explore some new strengthening mechanisms from the aspects of alloy component design, advanced manufacturing and processing technology and the like, so that the new strengthening mechanisms have favorable influence on the damping and mechanical properties of the magnesium-lithium alloy.
In recent years, researches show that long-period stacking ordered phases (called LPSO for short) can be generated in some Mg-RE-Zn, and the LPSO structure has a series of advantages of high strength, high ductility and toughness, high elastic modulus, good interface combination with a magnesium matrix and the like. Many research results show that the LPSO phase not only can improve the strength of the magnesium alloy, but also can improve the plasticity of the magnesium alloy and improve the damping performance of the alloy. In addition, twin boundaries with smooth interfaces are not easy to pin, and have good mobility under the action of external loads, so that twin crystals can be considered as a new energy consumption source, and the alloy material has good damping performance. It is well known that deformation twinning is one of the main plastic deformation modes of magnesium alloys.
Disclosure of Invention
The invention aims to provide a high-damping magnesium-lithium alloy containing an LPSO structural phase and a twin crystal structure, having high damping and mechanical property and enhanced twin crystal in a long-period stacking ordered phase, and a preparation method thereof.
The purpose of the invention is realized as follows:
the high-damping magnesium-lithium alloy with the twin crystal enhanced in the long-period stacking ordered phase comprises the following chemical components in percentage by mass: 8.0% of Li, 4.0% of Y, 2.0% of Er, 2.0% of Zn, 0.6% of Zr and the balance of magnesium;
the preparation method comprises the following steps:
the method comprises the following steps: smelting: placing alloy raw materials in a crucible, vacuumizing the furnace body to below 0.1Pa, filling argon to 0.05Mpa, and cooling with the furnace by adopting a vacuum and protective gas electromagnetic induction melting method to prepare a cube-shaped cast alloy with the thickness of 100mm multiplied by 40mm multiplied by 150 mm;
step two: and (3) heat treatment: the heat treatment temperature is 450 ℃, the heat treatment time is 6 hours, and the furnace cooling method is adopted for cooling, wherein the cooling speed is 0.4 ℃/min;
step three: rolling: and (3) cold-rolling the heat-treated alloy plate to a thickness of 2mm at room temperature, wherein the total pressing amount is 50%, and the pressing amount is 25% in a single pass, so that the long-period stacking ordered phase twin crystal enhanced high-damping magnesium-lithium alloy is obtained.
A preparation method of a twin crystal enhanced high damping magnesium-lithium alloy in a long-period stacking ordered phase comprises the following steps:
the method comprises the following steps: smelting: placing alloy raw materials in a crucible, vacuumizing the furnace body to below 0.1Pa, filling argon to 0.05Mpa, and cooling with the furnace by adopting a vacuum and protective gas electromagnetic induction melting method to prepare a cube-shaped cast alloy with the thickness of 100mm multiplied by 40mm multiplied by 150 mm;
step two: and (3) heat treatment: the heat treatment temperature is 450 ℃, the heat treatment time is 6 hours, and the furnace cooling method is adopted for cooling, wherein the cooling speed is 0.4 ℃/min;
step three: rolling: and (3) cold-rolling the heat-treated alloy plate to a thickness of 2mm at room temperature, wherein the total pressing amount is 50%, and the pressing amount is 25% in a single pass, so that the long-period stacking ordered phase twin crystal enhanced high-damping magnesium-lithium alloy is obtained.
The magnesium-lithium alloy comprises the following chemical components in percentage by mass: 8.0 percent of Li, 4.0 percent of Y, 2.0 percent of Er, 2.0 percent of Zn0 percent, 0.6 percent of Zr0 percent and the balance of magnesium.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, through the design of alloy components, a long-period stacking ordered structure is obtained in the magnesium-lithium alloy by heat treatment, and a nanometer twin crystal structure is obtained in the long-period stacking ordered structure by adopting a room temperature cold rolling technology, so that a damping value Q is obtained-1High damping magnesium-lithium alloys up to 0.02.
On the basis, the magnesium-lithium alloy is subjected to large plastic deformation by means of rolling and the like, twin crystals are introduced into a matrix or the LPSO structure, the mechanical property and the damping property of the alloy are further improved, the damping property and the mechanical property are synergistically improved by the LPSO and the twin crystals, and the ultralight magnesium-lithium alloy material with high mechanical property and damping property is obtained.
Drawings
FIG. 1 is the microstructure of the alloy after furnace cooling at 450 ℃ for 6 h;
FIGS. 2a-b are TEM images of the bulk phase after a heat treatment at 450 ℃ for 6h and the corresponding selected area electron diffraction;
FIGS. 3a-b are TEM images of the alloy after heat treatment and after 50% reduction and corresponding selected area electron diffraction;
FIG. 4 is a room temperature damping-strain curve of a heat treated and cold rolled alloy;
FIG. 5 is a room temperature stress-strain curve of a heat treated and cold rolled alloy.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention aims to prepare the magnesium-lithium alloy which contains LPSO structural phase and twin crystal structure and has high damping and mechanical properties; provides a preparation method of a magnesium-lithium alloy with high damping and mechanical properties for generating a twin structure in an LPSO structural phase.
The invention aims to solve the technical problem of providing a magnesium lithium alloy with high damping and mechanical propertiesGold and a method for preparing the same. The damping performance test of the high-damping magnesium-lithium alloy is carried out on a TA-Q800 type Dynamic Mechanical Analyzer (DMA), and the damping value Q of the material-1The damping material reaches 0.02, and the preparation method is simple, has high damping performance, and has good application prospect in the fields of aviation, aerospace, traffic and the like.
The preparation method of the twin crystal enhanced high-damping magnesium-lithium alloy in the long-period stacking ordered structure phase comprises the following steps:
a. the components by mass percentage are as follows: 8.0 percent of Li, 4.0 percent of Y, 2.0 percent of Er, 2.0 percent of Zn, 0.6 percent of Zr and the balance of magnesium.
b. The alloy raw materials are placed in a crucible, vacuum pumping is carried out, the furnace body atmosphere is vacuumized to be below 0.1Pa, and argon is filled to be 0.05 MPa.
c. A vacuum and protective gas electromagnetic induction smelting method is adopted, and cube block-shaped cast alloy with the thickness of 100mm multiplied by 40mm multiplied by 150mm is prepared by furnace cooling.
d. And (3) heat treatment: the heat treatment temperature is 450 ℃, the heat treatment time is 6 hours, and the furnace cooling method is adopted for cooling, wherein the cooling speed is 0.4 ℃/min.
e. Rolling: and (3) cold-rolling the heat-treated alloy plate to the thickness of 2mm at room temperature, wherein the total pressing amount is 50%, and the pressing amount is 25% in a single pass.
f. The nano twin crystal structure obtained by adopting the rolling technology in the long-period stacking ordered structure phase is a new vibration energy consumption source.
According to the invention, through the design of alloy components, a long-period stacking ordered structure is obtained in the magnesium-lithium alloy by heat treatment, and a nanometer twin crystal structure is obtained in the long-period stacking ordered structure by adopting a room temperature cold rolling technology, so that a damping value Q is obtained-1High damping magnesium-lithium alloys up to 0.02.
Examples
The magnesium-lithium alloy in the embodiment comprises the following chemical components in percentage by mass: 8.0% of Li, 4.0% of Y, 2.0% of Er2, 2.0% of Zn, 0.6% of Zr and the balance of magnesium. The specific process comprises the following steps:
(1) smelting: the designed components are weighed and proportioned according to mass percent, alloy smelting is carried out in a high vacuum electromagnetic induction smelting furnace, and cube block-shaped cast alloy with the thickness of 100mm multiplied by 40mm multiplied by 150mm is prepared by furnace cooling.
(2) And (3) heat treatment: and (3) carrying out heat treatment on the alloy obtained by casting at the temperature of 450 ℃ for 6h, and cooling by adopting a furnace cooling method at the cooling speed of 0.4 ℃/min.
(3) Rolling: the sample obtained by the heat treatment is subjected to cold rolling at room temperature, the total pressing amount is 50%, and the pressing amount is 25% in a single pass.
After the magnesium-lithium alloy is cooled with the furnace at 450 ℃ for 6 hours, a long-period stacking ordered structure appears in the magnesium-lithium alloy, as shown in figures 1 and 2; after the heat-treated sample is subjected to cold rolling with the room-temperature pressing amount of 50%, nano twin crystals appear in the long-period stacking ordered phase in the alloy, as shown in FIG. 3; damping Properties of the alloy after Heat treatment and the alloy after Cold Rolling are shown in FIG. 4, and damping Property Q of the alloy after Heat treatment-10.01, belongs to high damping alloy, and the damping performance Q of the alloy after cold rolling-1The damping performance of the alloy is obviously improved when the damping performance is 0.02; FIG. 5 is a graph of the mechanical properties of the alloy after heat treatment and the alloy after cold rolling.
Claims (3)
1. The high-damping magnesium-lithium alloy with the twin crystal enhanced in the long-period stacking ordered phase is characterized by comprising the following chemical components in percentage by mass: 8.0% of Li, 4.0% of Y, 2.0% of Er, 2.0% of Zn, 0.6% of Zr and the balance of magnesium;
the preparation method comprises the following steps:
the method comprises the following steps: smelting: placing alloy raw materials in a crucible, vacuumizing the furnace body to below 0.1Pa, filling argon to 0.05Mpa, and cooling with the furnace by adopting a vacuum and protective gas electromagnetic induction melting method to prepare a cube-shaped cast alloy with the thickness of 100mm multiplied by 40mm multiplied by 150 mm;
step two: and (3) heat treatment: the heat treatment temperature is 450 ℃, the heat treatment time is 6 hours, and the furnace cooling method is adopted for cooling, wherein the cooling speed is 0.4 ℃/min;
step three: rolling: and (3) cold-rolling the heat-treated alloy plate to a thickness of 2mm at room temperature, wherein the total pressing amount is 50%, and the pressing amount is 25% in a single pass, so that the long-period stacking ordered phase twin crystal enhanced high-damping magnesium-lithium alloy is obtained.
2. A preparation method of a twin crystal enhanced high damping magnesium-lithium alloy in a long-period stacking ordered phase is characterized by comprising the following steps:
the method comprises the following steps: smelting: placing alloy raw materials in a crucible, vacuumizing the furnace body to below 0.1Pa, filling argon to 0.05Mpa, and cooling with the furnace by adopting a vacuum and protective gas electromagnetic induction melting method to prepare a cube-shaped cast alloy with the thickness of 100mm multiplied by 40mm multiplied by 150 mm;
step two: and (3) heat treatment: the heat treatment temperature is 450 ℃, the heat treatment time is 6 hours, and the furnace cooling method is adopted for cooling, wherein the cooling speed is 0.4 ℃/min;
step three: rolling: and (3) cold-rolling the heat-treated alloy plate to a thickness of 2mm at room temperature, wherein the total pressing amount is 50%, and the pressing amount is 25% in a single pass, so that the long-period stacking ordered phase twin crystal enhanced high-damping magnesium-lithium alloy is obtained.
3. The preparation method of the high-damping magnesium-lithium alloy with the twin crystal enhanced in the long-period stacking ordered phase as claimed in claim 2, wherein the magnesium-lithium alloy comprises the following chemical components in percentage by mass: 8.0 percent of Li, 4.0 percent of Y, 2.0 percent of Er, 2.0 percent of Zn, 0.6 percent of Zr and the balance of magnesium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911408002.3A CN110983137B (en) | 2019-12-31 | 2019-12-31 | High-damping magnesium-lithium alloy with enhanced twin crystals in long-period stacking ordered phase and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911408002.3A CN110983137B (en) | 2019-12-31 | 2019-12-31 | High-damping magnesium-lithium alloy with enhanced twin crystals in long-period stacking ordered phase and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110983137A true CN110983137A (en) | 2020-04-10 |
| CN110983137B CN110983137B (en) | 2021-11-09 |
Family
ID=70079437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911408002.3A Active CN110983137B (en) | 2019-12-31 | 2019-12-31 | High-damping magnesium-lithium alloy with enhanced twin crystals in long-period stacking ordered phase and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110983137B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369339A (en) * | 2022-09-05 | 2022-11-22 | 航天科工(长沙)新材料研究院有限公司 | Heat treatment method of magnesium-lithium alloy die forging |
| CN115449679A (en) * | 2022-09-23 | 2022-12-09 | 牡丹江师范学院 | Preparation method of high-damping high-strength and high-toughness magnesium-lithium alloy with synergistically improved damping and mechanical properties |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008069418A (en) * | 2006-09-14 | 2008-03-27 | Kumamoto Univ | High strength magnesium alloy with excellent corrosion resistance |
| CN101857936A (en) * | 2010-07-05 | 2010-10-13 | 重庆大学 | Method for preparing magnesium alloy |
| CN103122431A (en) * | 2013-03-01 | 2013-05-29 | 哈尔滨工程大学 | Magnesium-lithium alloy with enhanced long-period structure phase and preparation method thereof |
| EP1688509B1 (en) * | 2003-11-26 | 2014-01-15 | KAWAMURA, Yoshihito | High strength and high toughness magnesium alloy and method for production thereof |
| CN103993213A (en) * | 2014-05-27 | 2014-08-20 | 华东交通大学 | Method for preparing dual special structure combined reinforced Mg-Zn-Y alloy |
| CN107630157A (en) * | 2017-08-29 | 2018-01-26 | 西安理工大学 | A kind of preparation method of the magnesium lithium alloy of LPSO long-periodic structures enhancing |
| CN107675053A (en) * | 2017-08-29 | 2018-02-09 | 西安理工大学 | A kind of preparation method of high strength magnesium lithium alloy and its deep cooling intensive treatment |
| CN109136704A (en) * | 2018-09-26 | 2019-01-04 | 浙江海洋大学 | A kind of single-phase (α phase) magnesium lithium alloy material of high intensity and preparation method thereof |
-
2019
- 2019-12-31 CN CN201911408002.3A patent/CN110983137B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1688509B1 (en) * | 2003-11-26 | 2014-01-15 | KAWAMURA, Yoshihito | High strength and high toughness magnesium alloy and method for production thereof |
| JP2008069418A (en) * | 2006-09-14 | 2008-03-27 | Kumamoto Univ | High strength magnesium alloy with excellent corrosion resistance |
| CN101857936A (en) * | 2010-07-05 | 2010-10-13 | 重庆大学 | Method for preparing magnesium alloy |
| CN103122431A (en) * | 2013-03-01 | 2013-05-29 | 哈尔滨工程大学 | Magnesium-lithium alloy with enhanced long-period structure phase and preparation method thereof |
| CN103993213A (en) * | 2014-05-27 | 2014-08-20 | 华东交通大学 | Method for preparing dual special structure combined reinforced Mg-Zn-Y alloy |
| CN107630157A (en) * | 2017-08-29 | 2018-01-26 | 西安理工大学 | A kind of preparation method of the magnesium lithium alloy of LPSO long-periodic structures enhancing |
| CN107675053A (en) * | 2017-08-29 | 2018-02-09 | 西安理工大学 | A kind of preparation method of high strength magnesium lithium alloy and its deep cooling intensive treatment |
| CN109136704A (en) * | 2018-09-26 | 2019-01-04 | 浙江海洋大学 | A kind of single-phase (α phase) magnesium lithium alloy material of high intensity and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115369339A (en) * | 2022-09-05 | 2022-11-22 | 航天科工(长沙)新材料研究院有限公司 | Heat treatment method of magnesium-lithium alloy die forging |
| CN115449679A (en) * | 2022-09-23 | 2022-12-09 | 牡丹江师范学院 | Preparation method of high-damping high-strength and high-toughness magnesium-lithium alloy with synergistically improved damping and mechanical properties |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110983137B (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Park et al. | Development of lightweight MgLiAl alloys with high specific strength | |
| Niu et al. | Strengthening of nanoprecipitations in an annealed Al0. 5CoCrFeNi high entropy alloy | |
| Wang et al. | Effects of Ca on the formation of LPSO phase and mechanical properties of Mg-Zn-Y-Mn alloy | |
| Wang et al. | Mechanical behavior of Al-based matrix composites reinforced with Mg58Cu28. 5Gd11Ag2. 5 metallic glasses | |
| Qu et al. | The solution and room temperature aging behavior of Mg–9Li–xAl (x= 3, 6) alloys | |
| CN110983137B (en) | High-damping magnesium-lithium alloy with enhanced twin crystals in long-period stacking ordered phase and preparation method thereof | |
| CN101386928A (en) | Method for preparing high-entropy alloy containing immiscible element | |
| Qiu et al. | Microstructures and mechanical properties of titanium alloy connecting rod made by powder forging process | |
| CN103741080B (en) | (Ti-Zr-Nb-Cu-Be)-O system amorphous composite and preparation method thereof | |
| Tu et al. | A simultaneous increase of elastic modulus and ductility by Al and Li additions in Mg-Gd-Zn-Zr-Ag alloy | |
| Guo et al. | Work-hardenable Mg-based bulk metallic glass matrix composites reinforced by ex-situ porous shape-memory-alloy particles | |
| Wang et al. | Microstructures and mechanical properties of as-cast Mg–5Y–3Nd–Zr–xGd (x= 0, 2 and 4 wt.%) alloys | |
| Zhang et al. | Microstructure and mechanical properties of Mg–Zn–Dy–Zr alloy with long-period stacking ordered phases by heat treatments and ECAP process | |
| CN102719769B (en) | High-strength aluminum-based bulk amorphous composite material | |
| Wang et al. | Effects of heat treatment on the morphology of long-period stacking ordered phase and the corresponding mechanical properties of Mg–9Gd–xEr–1.6 Zn–0.6 Zr magnesium alloys | |
| Liu et al. | Effects of particle size and properties on the microstructures, mechanical properties, and fracture mechanisms of 7075Al hybrid composites prepared by squeeze casting | |
| Liu et al. | Microstructure and mechanical properties of a Mg 94 Y 4 Ni 2 alloy with long period stacking ordered structure | |
| Hu et al. | The role of Nd on the microstructural evolution and compressive behavior of Ti–Si alloys | |
| Zhao et al. | As-cast high entropy shape memory alloys of (TiHfX) 50 (NiCu) 50 with large recoverable strain and good mechanical properties | |
| CN102181748B (en) | Titanium-aluminum base alloy with excellent room temperature ductility and casting fluidity and preparation method of titanium-aluminum base alloy | |
| Louzguine et al. | Bulk metallic glasses: Fabrication, structure, and structural changes under heating | |
| Wang et al. | Phase structure of ZK60-1Er magnesium alloy compressed at 450 C | |
| Morris et al. | Refinement of second phase dispersions in iron aluminide intermetallics by high-temperature severe plastic deformation | |
| She et al. | High volume intermetallics reinforced Ti-based composites in situ synthesized from Ti–Si–Sn ternary system | |
| Lei et al. | A novel Fe-rich Fe-Cr-Ni-Si-Al high-entropy alloy with low-cost and outstanding as-cast mechanical properties |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |