CN101403060A - High damnification resistant aluminum alloy - Google Patents
High damnification resistant aluminum alloy Download PDFInfo
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- CN101403060A CN101403060A CNA2008101435768A CN200810143576A CN101403060A CN 101403060 A CN101403060 A CN 101403060A CN A2008101435768 A CNA2008101435768 A CN A2008101435768A CN 200810143576 A CN200810143576 A CN 200810143576A CN 101403060 A CN101403060 A CN 101403060A
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Abstract
The invention belongs to the technical field of metal alloys. A high damage-resisting aluminum alloy provided by the invention is characterized in that 0.001-1.0 percent (weight percent) of bismuth is added to a substrate of the aluminum alloy and the optimal content range of the added bismuth is 0.001-0.3 percent. The preparation method of the high damage-resisting aluminum alloy is realized by adding metal bismuth in the melting process of the aluminum alloy. Owing to the addition of minim bismuth, the invention remarkably improves the toughness of the material and particularly promotes the fatigue and damage resisting performances of the material. The high damage-resisting aluminum alloy can be used in the structural members of aviation, automobile and other industries.
Description
Technical field
The present invention relates to the non-ferrous metal alloy technology of field of metallurgy, belong to a kind of advanced aluminium alloy material specifically through microalloying.
Background technology
Aluminium alloy has series of advantages such as density is little, intensity is high, corrosion-resistant, easy processing, aboundresources, obtains using extremely widely in industries such as aviation, communications and transportation, power electronics, building packings.It is not only big, the wide base mateiral of a class amount, and occupies crucial status in national defense construction, is bringing into play irreplaceable effect.How to continually develop new variety, further improve the aluminum performance and become current international Aluminum circle questions of common interest.The research and development target of aluminum current alloy has been changed into the integral body lifting of material over-all properties by the simple pursuit high strength in past, promptly further improve the weather resistance and the damage tolerance of alloy when improving the strong plasticity of aluminium alloy.Aluminium alloy is just strong towards height ratio, height ratio mould, high damage tolerance and heat-resisting, anti-corrosion direction develop, and a small amount of even trace of some element exists the tissue and the performance of meeting remarkably influenced aluminium alloy, microalloying is just becoming the important means of excavating the alloy potentiality, improving alloy property and further development of new aluminium alloy, has caused extensive concern both domestic and external.
Summary of the invention
Problem to be solved by this invention is to seek a kind of element of suitable aluminium alloy microalloying, when aluminium alloy is produced the highly malleablized effect, improves the antifatigue damage performance of alloy, thus the whole over-all properties that promotes material.
High damnification resistant aluminum alloy provided by the present invention is characterized in that having added weight percent in the matrix of aluminium alloy is the bismuth of 0.001%-1.0%.
The optimum content scope of above-described bismuth metal is: 0.001-0.3%.
The present invention has significantly changed the kinetics of separating out of alloy owing to add trace bismuth, has increased separating out density and making its uniform distribution of strengthening phase; Simultaneously, the bismuth atom that is attracted to the recrystallize crystal boundary has reduced the interfacial energy at interface, has hindered moving of crystal boundary, makes growing up of recrystal grain make inhibition, i.e. the existence of trace bismuth not only refinement crystal grain, and strengthened crystal boundary.
Description of drawings
Accompanying drawing 1 is the fatigue crack growth rate test-results of (a) back (b) Al-4.2Cu-1.4Mg-0.08Zr-0.6Mn alloy when R=0.1 before the micro-Bi of interpolation.
Embodiment
Embodiment adopts plumbago crucible and iron mould casting legal system to be equipped with alloy cast ingot, and raw materials used is 99.99% rafifinal, pure magnesium, pure bismuth, and the master alloy of 10.12%Mn, 2.98%Zr.Ingot casting hot rolling after the homogenizing, cold rolling and become the sheet material of 2mm.Two kinds of materials are all through T4 thermal treatment (shrend after 500 ℃ of solution treatment, room temperature natural aging 96h) back test room temperature tensile property and fatigue property.Table 1 has been listed the mechanical property of adding two kinds of alloys before and after the trace bismuth, as can be seen from the table, adds the Al-4Cu-1.5Mg alloy behind the micro-Bi, tensile strength sigma under the T4 attitude
b, yield strength σ
0.2δ is significantly improved simultaneously with unit elongation.Fig. 1 has provided and has added before and after the micro-Bi two kinds of alloys fatigue crack growth rate test-results during at R=0.1 after T4 handles, and as can be seen from the figure, the alloy fatigue crack growth rate da/dn that contains micro-Bi is significantly less than the alloy that does not contain Bi.
Tensile property after table 1 alloy A l-4.2Cu-1.4Mg-0.08Zr-0.6Mn-(0.05Bi) T4 attitude is handled
| Alloy | σ b(Mpa) | σ 0.2(Mpa) | δ(％) |
| Al-4.2Cu-1.4Mg-0.08Zr-0.6Mn | 448.4 | 288.0 | 22.8 |
| Al-4.2Cu-1.4Mg-0.08Zr-0.6Mn- 0.05Bi | 469.6 | 307.5 | 26.0 |
Claims (2)
1. a high damnification resistant aluminum alloy is characterized in that: the bismuth that adds the 0.001%-1.0% weight percent in alloy matrix aluminum.
2. aluminium alloy according to claim 1 is characterized in that: the optimum content scope of bismuth is 0.001-0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101435768A CN101403060B (en) | 2008-11-13 | 2008-11-13 | High damnification resistant aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101435768A CN101403060B (en) | 2008-11-13 | 2008-11-13 | High damnification resistant aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101403060A true CN101403060A (en) | 2009-04-08 |
| CN101403060B CN101403060B (en) | 2010-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101435768A Expired - Fee Related CN101403060B (en) | 2008-11-13 | 2008-11-13 | High damnification resistant aluminum alloy |
Country Status (1)
| Country | Link |
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| CN (1) | CN101403060B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113584351A (en) * | 2021-06-08 | 2021-11-02 | 昆明理工大学 | Rare earth-free aluminum alloy and preparation method and application thereof |
-
2008
- 2008-11-13 CN CN2008101435768A patent/CN101403060B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113584351A (en) * | 2021-06-08 | 2021-11-02 | 昆明理工大学 | Rare earth-free aluminum alloy and preparation method and application thereof |
| CN113584351B (en) * | 2021-06-08 | 2022-06-24 | 昆明理工大学 | Rare earth-free aluminum alloy and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN101403060B (en) | 2010-08-25 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100825 Termination date: 20121113 |