CN103993199A - Ti-Nb-xB-system high damping alloy and preparation method thereof - Google Patents
Ti-Nb-xB-system high damping alloy and preparation method thereof Download PDFInfo
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- CN103993199A CN103993199A CN201410255055.7A CN201410255055A CN103993199A CN 103993199 A CN103993199 A CN 103993199A CN 201410255055 A CN201410255055 A CN 201410255055A CN 103993199 A CN103993199 A CN 103993199A
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Abstract
The invention discloses a Ti-Nb-xB-system high damping alloy which is prepared by an arc melting method. The method comprises the following basic steps: cutting a titanium plate into dices, cutting a columbium wire into small sections, and pressing boron powder into small disks; removing oil stains on the metal surface; removing oxide skin on the metal surface; weighing according to the proportion of Ti-25Nb-xB (at%) (x=0.5, 1, 1.5, 2); putting the weighed raw materials into a water cooled crucible, and carrying out arc melting 5 times to obtain a button alloy ingot; and cutting the prepared button alloy ingot, and carrying out tissue observation and performance testing. The boron atoms in the alloy used as minor-radius interstitial atoms in the Snoek relaxation effect can be added into the corresponding high damping titanium alloy more easily, and can be used as new interstitial atoms instead of C, N, O and other atoms. The addition amount of the B element has great influence on the mechanical properties of the alloy; as the addition amount of the B element increases, the yield strength of the alloy decreases, but then the strain is strengthened, and the plastic deformation is increased to some extent.
Description
Technical field
The invention belongs to Snoek type high damping titanium alloy field, relate to the new system alloy of preparing the element participation titanium alloy relaxation processes such as a kind of B replacement C, N, O with electric arc melting method.
Background technology
Along with the continuous progress of science and technology, the requirement in travelling speed, precision and life-span to machine in industrial sector is more and more higher, and a lot of component are also because the raising of the reason remarkably influenced system performances such as vibration.In military field, vibration, noise badly influence the disguise of system, and these reasons all cause a lot of military equipments to be found, such as submarine and reconnaissance plane etc.In daily life, along with the development of building field, the buildings that is building or bridge and so on is all to build higher and higher, and the natural disasteies such as earthquake and typhoon just more and more highlight these structural damage effects.So, people just fill up the deficiency in these fields in the urgent need to high performance Novel Damping Materials, be mainly used for all controlled high damping materials of the damping capacity of vibration and noise reducing aspect and mechanical property, so the high damping material of development of new becomes the most important thing instantly.
Selecting Snoek type high damping titanium alloy is mainly based on following primary condition as research object:
One, high damping titanium alloy has enough damping values and wider peak temperature scope, can make the performance of alloy more be applicable to the environment using.
Two, titanium alloy crystalline structure in the time that temperature is higher is β phase, the body-centered cubic structure of stablizing β phase constitution can ensure the diffusion of interstitial atom under outside stress and distribute, meanwhile, beta titanium alloy also has good mechanical property, higher heat-resistant stability energy.
Snoek relaxation effect is found there has been so far the history of many years, people also observe this phenomenon in succession in Bimary and trinary alloy system, but the research for this theory is also not enough, different scholars does not provide unified explanation for the relation between some physical parameters of Snoek relaxation process, and different people has different views.Also inadequate for the investigation of minor radius interstitial atom that produces relaxation process, as far back as have the elements such as C, N, O as the unit of interstitial atom with regard to there being scholar to report many years ago, may also have B.But in the Snoek relaxation theory of finding afterwards, minor radius atom C, the N and the O etc. that produce relaxation are found in succession, could participate in relaxation process as interstitial atom for B and there is not yet report, therefore we need to carry out the research and development of new system, preparation Ti-Nb-B system alloy, investigate B impact on Snoek relaxation process as minor radius interstitial atom, the not enough and exploitation that makes up existing damping alloy has the high damping alloy system of superperformance.
Summary of the invention
For above-mentioned present situation, the invention provides a kind of new Ti-Nb-B system alloy that adopts the method preparation of arc melting to participate in titanium alloy Snoek relaxation process using B as interstitial atom, the contribution of desk study B element to Snoek relaxation process.
A kind of Ti-Nb-xB system of the present invention high damping alloy, has following molecular formula composition: Ti-25Nb-xB (at%), wherein, and x=0.5～2; And adopt arc melting method to prepare.
The molecular formula of described Ti-Nb-xB system high damping alloy can be the one in Ti-25Nb-0.5B, Ti-25Nb-1B, Ti-25Nb-1.5B and Ti-25Nb-2.0B.
The preparation method of Ti-Nb-xB system high damping alloy of the present invention, comprises the following steps:
Step 1, get titanium metal piece and niobium metal silk section, and it is for subsequent use that boron powder is pressed into disk;
Step 2, removal titanium and niobium metal surface oil stain: soak titanium metal piece with the acetone of 50% concentration respectively and more than niobium metal silk section 8h, in Ultrasonic Cleaners, clean, then cleaning up with alcohol;
Step 3, remove titanium and niobium metal surface scale: with part by weight be HF:HNO
3: H
2the scavenging solution of O=1:2:47 carries out pickling 2min to titanium metal piece and niobium metal silk section respectively, then carries out ultrasonic cleaning with alcohol;
Step 4, be Ti-25Nb-xB according to atomic percent, wherein the proportioning of x=0.5～2 weighs titanium metal piece, niobium metal silk section and boron powder;
Step 5, above-mentioned load weighted each component is put into cold-crucible carry out arc melting, melt back 5 times, obtaining molecular formula is the high damping alloy ingot of Ti-25Nb-xB, wherein, x=0.5～2.
In preparation method of the present invention, adopt the method for arc melting to carry out melt back to raw material, various elements are fully spread, obtain Ti-Nb-xB system alloy fine and close, homogeneous microstructure.High damping alloy ingot by the Ti-25Nb-xB to the present invention's acquisition cuts and carries out after structure observation and performance test, can obtain: in Ti-Nb-xB system high damping alloy of the present invention, boron atom is more easily added in corresponding high damping titanium alloy as the minor radius interstitial atom in Snoek relaxation effect, and can replace the atoms such as C, N, O becomes new interstitial atom.Along with the increase of B content, the intensity decrease to some degree of alloy, but raising all appears in peak value and dynamic storage modulus, occurs multimodal phenomenon.
Brief description of the drawings
Fig. 1 is the X ray diffracting spectrum of the Ti-Nb-xB system high damping alloy of preparation method's acquisition of the present invention, wherein, (a) that illustrate is Ti-25Nb-0.5B, (b) that illustrate is Ti-25Nb-1B, (c) that illustrate is Ti-25Nb-1.5B, and that (d) illustrate is Ti-25Nb-2B;
Fig. 2 is the change curve of the Snoek relaxation peak of the Ti-Nb-xB system high damping alloy that obtains of preparation method of the present invention under different frequency along with temperature, (a) Ti-25Nb-0.5B (b) Ti-25Nb-2B;
Fig. 3 is the room temperature compressive stress strain curve of the Ti-Nb-xB system high damping alloy of preparation method's acquisition of the present invention, that wherein (a) illustrates is Ti-25Nb-0.5B, (b) that illustrate is Ti-25Nb-1B, (c) that illustrate is Ti-25Nb-1.5B, and that (d) illustrate is Ti-25Nb-2B;
Fig. 4 is the metallographic structure of the Ti-Nb-xB system high damping alloy of preparation method's acquisition of the present invention, wherein, (a) that illustrate is Ti-25Nb-0.5B, (b) that illustrate is Ti-25Nb-1B, (c) that illustrate is Ti-25Nb-1.5B, and that (d) illustrate is Ti-25Nb-2B;
Fig. 5 is the SEM tissue of the as cast condition Ti-25Nb-2B alloy of preparation method's acquisition of the present invention.
Embodiment
Adopt the method for arc melting to prepare Ti-Nb-xB (at%) (x=0.5,1,1.5,2) system alloy.
Embodiment 1:
Adopt arc melting method to prepare Ti-25Nb-0.5B alloy
Step 1, titanium plate is cut into fritter, niobium silk is cut into segment, and boron powder is pressed into the sequin of Φ 5mm.
Step 2, removal metallic surface oil stain: more than soaking with the acetone of 50% concentration the titanium piece 8h cutting, in Ultrasonic Cleaners, clean, then clean up with alcohol.
Step 3, remove oxidation on metal surface skin: with ratio be HF:HNO
3: H
2the scavenging solution of O=1:2:47 carries out pickling 2min, then carries out ultrasonic cleaning with alcohol.
Step 4, according to the proportioning of Ti-25Nb-0.5B (at%), raw material is weighed.
Step 5, load weighted raw material is put into cold-crucible carry out arc melting, melt back 5 times, obtains a button alloy pig.
The alloy pig that above-described embodiment 1 is obtained carries out sample pretreating, obtains the XRD diffraction sample, damping sample and the compression sample that meet test request.Damping capacity test is carried out on TA-Q800 type dynamic mechanical analyzer (DMA), and test condition is in table 1.Except DMA test, to the sample corrosion treatment through polishing, carry out microstructure observation and analysis.
Table 1DMA test condition is selected
Sample is tested, XRD experimental result is shown in (a) in Fig. 1, damping capacity test is carried out on TA-Q800 type dynamic mechanical analyzer (DMA), test condition is in table 1, the damping capacity of embodiment 1 alloy is shown in (a) in Fig. 2, compression obtains stress-strain curve and sees (a) in Fig. 3, and microstructure is shown in (a) in Fig. 4.
Embodiment 2:
Adopt arc melting method to prepare Ti-25Nb-1B alloy, with the difference of above-described embodiment 1 only for step 3 is according to the proportioning of Ti-25Nb-1B (at%), raw material to be weighed.
The alloy pig that embodiment 2 is obtained carries out sample pretreating and test: sample is processed, obtained the XRD diffraction sample, damping sample and the compression sample that meet test request.Sample is tested, and XRD experimental result is shown in (b) in Fig. 1, and compression obtains stress-strain curve and sees (b) in Fig. 3, and microstructure is shown in (b) in Fig. 4.
Embodiment 3:
Adopt arc melting method to prepare Ti-25Nb-1.5B alloy, with the difference of above-described embodiment 1 only for step 3 is according to the proportioning of Ti-25Nb-1.5B (at%), raw material to be weighed.
The alloy pig that embodiment 3 is obtained carries out sample pretreating and test: sample is processed, obtained the XRD diffraction sample, damping sample and the compression sample that meet test request.Sample is tested, and XRD experimental result is shown in (c) in Fig. 1, and compression obtains stress-strain curve and sees (c) in Fig. 3, and microstructure is shown in (c) in Fig. 4.
Embodiment 4:
Adopt arc melting method to prepare Ti-25Nb-2B alloy, with the difference of above-described embodiment 1 only for step 3 is according to the proportioning of Ti-25Nb-2.0B (at%), raw material to be weighed.
The alloy pig that embodiment 4 is obtained carries out sample pretreating and test: sample is processed, obtained the XRD diffraction sample, damping sample and the compression sample that meet test request.XRD experimental result is shown in (d) in Fig. 1, the damping capacity of alloy is shown in (b) in Fig. 2, compression obtains stress-strain curve and sees (d) in Fig. 3, microstructure is shown in (d) in Fig. 4, SEM tissue is shown in Fig. 5, the needle-like precipitate that table 2 shows in Fig. 5 contains Ti, Nb, tri-kinds of elements of B, because Ti and Nb form sosoloid, so determine that needle-like precipitate is (Ti, Nb)
2b
5.
Table 2
By the analysis of above-described embodiment 1-4 test result is shown, along with the increase of B element, it is tiny that alloy grain becomes, and in the time that B content is 2.0, crystal boundary has Second Phase Precipitation, and contrasting known precipitated phase by XRD analysis and standard P DF card is TiB and Ti
2b
5; Along with the increase of B element, the storage modulus of alloy is more and more higher, and 0.015 left and right that peak value is 0.5 o'clock from B content rises to 0.025 left and right, and in the time that B content is 2.0, the Snoek relaxation peak of 400K left and right presents bimodal state; The Effect on Mechanical Properties of the addition alloy of B element is larger, and along with the increase of B element, reducing appears in the yield strength of alloy, but occurs subsequently strain hardening, and amount of plastic deformation has certain increase.Wherein B element addition be 1.0 o'clock more abnormal, reason be melting inhomogeneous due to.
To sum up, in preparation method of the present invention, adopt the method for arc melting to carry out melt back to raw material, various elements are fully spread, obtain Ti-Nb-xB system alloy fine and close, homogeneous microstructure.High damping alloy ingot by the Ti-25Nb-xB to the present invention's acquisition cuts and carries out after structure observation and performance test, can obtain: in Ti-Nb-xB system high damping alloy of the present invention, boron atom is more easily added in corresponding high damping titanium alloy as the minor radius interstitial atom in Snoek relaxation effect, and can replace the atoms such as C, N, O becomes new interstitial atom.Along with the increase of B content, the intensity decrease to some degree of alloy, but raising all appears in peak value and dynamic storage modulus, occurs multimodal phenomenon.
Although in conjunction with figure, invention has been described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present invention; in the situation that not departing from aim of the present invention, can also make a lot of distortion, within these all belong to protection of the present invention.
Claims (6)
1. a Ti-Nb-xB system high damping alloy, is characterized in that, has following molecular formula composition: Ti-25Nb-xB (at%), wherein, and x=0.5～2; And adopt arc melting method to prepare.
2. Ti-Nb-xB system high damping alloy according to claim 1, is characterized in that, has following molecular formula composition: Ti-25Nb-0.5B (at%).
3. Ti-Nb-xB system high damping alloy according to claim 1, is characterized in that, has following molecular formula composition: Ti-25Nb-1B (at%).
4. Ti-Nb-xB system high damping alloy according to claim 1, is characterized in that, has following molecular formula composition: Ti-25Nb-1.5B (at%).
5. Ti-Nb-xB system high damping alloy according to claim 1, is characterized in that, has following molecular formula composition: Ti-25Nb-2B (at%).
6. a preparation method for Ti-Nb-xB system high damping alloy as claimed in claim 1, comprises the following steps:
Step 1, get titanium metal piece and niobium metal silk section, and it is for subsequent use that boron powder is pressed into disk;
Step 2, removal titanium and niobium metal surface oil stain: soak titanium metal piece with the acetone of 50% concentration respectively and more than niobium metal silk section 8h, in Ultrasonic Cleaners, clean, then cleaning up with alcohol;
Step 3, remove titanium and niobium metal surface scale: with part by weight be HF:HNO
3: H
2the scavenging solution of O=1:2:47 carries out pickling 2min to titanium metal piece and niobium metal silk section respectively, then carries out ultrasonic cleaning with alcohol;
Step 4, be Ti-25Nb-xB according to atomic percent, wherein the proportioning of x=0.5～2 weighs titanium metal piece, niobium metal silk section and boron powder;
Step 5, above-mentioned load weighted each component is put into cold-crucible carry out arc melting, melt back 5 times, obtaining molecular formula is the high damping alloy ingot of Ti-25Nb-xB, wherein, x=0.5～2.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH059630A (en) * | 1990-11-09 | 1993-01-19 | Toyota Central Res & Dev Lab Inc | Sintered titanium alloy and production thereof |
| JPH0776745A (en) * | 1993-07-14 | 1995-03-20 | Honda Motor Co Ltd | High strength and high ductility ti-al intermetallic compound |
| JP2007016313A (en) * | 2005-06-10 | 2007-01-25 | Charmant Inc | Structural member for eyeglass, eyeglass frame comprising the structural member, and processes for production of the structural member and the eyeglass frame |
| CN102719700A (en) * | 2012-06-04 | 2012-10-10 | 天津大学 | Ti-Nb-O high damping titanium alloy and powder metallurgy preparation method thereof |
| CN103643066A (en) * | 2013-12-03 | 2014-03-19 | 天津大学 | Preparation method of high-damping titanium alloy |
-
2014
- 2014-06-10 CN CN201410255055.7A patent/CN103993199A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH059630A (en) * | 1990-11-09 | 1993-01-19 | Toyota Central Res & Dev Lab Inc | Sintered titanium alloy and production thereof |
| JPH0776745A (en) * | 1993-07-14 | 1995-03-20 | Honda Motor Co Ltd | High strength and high ductility ti-al intermetallic compound |
| JP2007016313A (en) * | 2005-06-10 | 2007-01-25 | Charmant Inc | Structural member for eyeglass, eyeglass frame comprising the structural member, and processes for production of the structural member and the eyeglass frame |
| CN102719700A (en) * | 2012-06-04 | 2012-10-10 | 天津大学 | Ti-Nb-O high damping titanium alloy and powder metallurgy preparation method thereof |
| CN103643066A (en) * | 2013-12-03 | 2014-03-19 | 天津大学 | Preparation method of high-damping titanium alloy |
Non-Patent Citations (1)
| Title |
|---|
| 王志威: ""β 相稳定化元素对 Ti-25.0Nb-1.5O(at.%)合金阻尼特性的影响研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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Application publication date: 20140820 |