采用金相、透射电镜、高温拉伸等检测手段研究了双级时效对1420铝锂合金组织及超塑性的影响,结果表明:与单级时效相比,双级时效处理得到分布更均匀、体积分数更大的析出相粒子.双级时效经过轧制和再结晶退火后,得到的晶粒尺寸为8～12μm;500℃条件下8×10-4s-1超塑性伸长率达到860%.第一级低温时效先在基体形成较均匀的细小粒子,这些粒子不仅在晶界,也在晶内大量析出.在高温时效时,这些粒子长大形成分布均匀,体积分数大的析出相粒子.
参考文献
| [1] | Rinker J G;Marek M;Sanders T H .New light alloys of aluminum-lithium-magnesium[J].Materials Science and Engineering A,1984,64:203-207. |
| [2] | Dejong H F .A survey of the development and application of aliminum-lithium alloys[J].Aliminum,1984,9:673-679. |
| [3] | Sheppard T;Parson N C .Corrosion resistance of Al-Li alloys[J].Materials Science and Technology A,1987,30:341-352. |
| [4] | 张蕾,祝铭亮,黄正.双级时效对1420合金模锻材料组织和性能的影响[J].轻合金加工技术,2003(06):36-39. |
| [5] | 王大勇,冯吉才,刘会杰.Al-Li-Cu合金搅拌摩擦焊与TIG 焊接头组织及力学性能分析[J].焊接,2004(11):12-14. |
| [6] | B. Zhang;D.J. Mynors;A. Mugarra .Representing the superplasticity of Inconel 718[J].Journal of Materials Processing Technology,2004(0):694-698. |
| [7] | 黄光杰,汪凌云,杨文敏,蒋作文,刘诚.1420Al-Li合金模锻件热处理新工艺及机理[J].重庆大学学报(自然科学版),2002(12):42-45. |
| [8] | 马勤.温轧态稀土铝锂合金高应变速率超塑性[J].甘肃科技纵横,2002(03):31-32. |
| [9] | Genki Sakai;Zenji Horita;Terence G. Langdon .Grain refinement and superplasticity in an aluminum alloy processed by high-pressure torsion[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):344-351. |
| [10] | Zubear A K;U Chakkingal;P Venugopal .Analysis of forming loads,microstructure development and mechanical property evolution during equal channel angular extrusion of a commercial grade aluminium alloy[J].Journal of Materials Processing Technology,2003,135:59-67. |
| [11] | Genki Sakai;Zenji Horita;Terence G. Langdon .Grain refinement and superplasticity in an aluminum alloy processed by high-pressure torsion[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):344-351. |
| [12] | Smolej A;Gnamus M;Slacek E .The influence of the thermomechanical processing and forming parameters on superplastic behavieur of the 7475 aluminium alloy[J].Journal of Materials Processing Technology,2001,118:397-402. |
| [13] | 张晓博;崔建忠;张彩培.Al-Mg-Li-Zr合金超塑性能的研究[J].轻金属,1997(05):50-52. |
| [14] | HUMPHREYS F J;HATHERLY M.Recrystallization and Related Annealing Phenomena[A].,1995:236-258. |
| [15] | 李海,雷毅,刘志义.2091铝锂合金动态再结晶诱发超塑变形中的空洞行为[J].中国有色金属学报,2001(z1):17-22. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%