研究了不同含量Sr对AM50合金微观组织和力学性能的影响.结果表明,添加Sr后,AM50合金铸体组织β-Mg17Al12变得细小,晶粒明显细化;Sr基本上与Al结合生成高熔点、高稳定的Al4Sr相,能够强化晶界并阻碍位错滑移,从而强化合金.适量的Sr明显提高了室温下合金的屈服强度和抗拉强度,而且不影响合金的延伸率,而过量的Sr会导致AM50延伸率和轻度的降低.含0.5%Sr的铸态合金可得到最高抗拉强度233MPa,屈服强度90MPa,延伸率16.3%的性能.
参考文献
| [1] | 黄晓锋,梁艳,谢锐,王韬,曹喜娟,朱凯,田载友.新型镁合金研究进展[J].热处理技术与装备,2009(03):3-8. |
| [2] | 翟春泉,曾小勤,丁文江,王渠东,吕宜振,徐小平.镁合金的开发与应用[J].机械工程材料,2001(01):6-10. |
| [3] | Avedusian M M;Baker H.Mangnesium and magnesium alloys,ASM specialty handbook[M].Materials Park,OH:ASM International,1999 |
| [4] | Kubota K et al.Review processing and mechanical properties of fine-grained magnesium alloys[J].Materials Science,1999,34:2255. |
| [5] | Wang R M;Eliezer A .Gutman E M An investigation on the microstructure of an AM50 magnesium alloy[J].Materials Science and Engineering,2003,355(1-2):201. |
| [6] | Pekguleryuz Mihriban O;Baril Eric.Development of creep resistant Mg-Al-Sr alloys[A].TMS,2001:119. |
| [7] | Baril Eric;Labelle Pierre;Pekguleryuz Mihriban O .Elevated temperature Mg-Al-Sr:Creep resistance,mechanical properties,and microstructure minerals[J].Metals Mater Soc,2003,55(17):34. |
| [8] | Mihriban O. Pekguleryuz;Eric Baril;Pierre Labelle;Donald Argo .Creep Resistant Mg-Al-Sr Alloys[J].Journal of advanced materials,2003(3):32-38. |
| [9] | Pekguleryuz M;Labelle P;Argo D.Magnesium diecasting alloy AJ62x with superior creep resistance,ductility and diecastability[A].TMS,2003:201. |
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%