期刊论文

Effect of annealing temperature on microstructure and mechanical properties of rolled Mg-1Li-3Al-1Zn-0.3(Al5Ti1B) alloy

Gao, Z.

中文

金属热处理

Heat Treatment of Metals

0254-6051

2017

42

9

71-75

10.13251/j.issn.0254-6051.2017.09.016

内蒙古自治区自然科学基金(2015BS0512)； 内蒙古科技大学创新基金(2014QDL016)；

本校为其他机构

利用光学显微镜(OM)、扫描电镜(SEM)和电子万能试验机研究了热轧及退火态Mg-1Li-3Al-1Zn-0.3(Al5Ti1B)合金板材的显微组织及力学性能.结果表明:合金板材经150℃退火30 min后的组织与热轧态类似,存在大量的孪晶与剪切带,在室温下拉伸时其抗拉强度可达314 MPa,屈服强度为269 MPa,伸长率为24.4%;而经300℃退火30 min后,组织变为细小的再结晶组织,各向异性现象较小,塑性较150℃退火时有所提高,断口呈现韧性断裂特征.

Microstructure and mechanical properties of rolled and annealed Mg-1Li-3Al-1Zn-0.3(Al5Ti1B) alloy were analyzed by using optical microscopy (OM), scanning electron microscope (SEM) and tensile tester. The results show that when annealed at 150℃ for 30 min, the microstructure of the Mg-1Li-3Al-1Zn-0.3(Al5Ti1B) alloy sheet is similar to the rolled state which has a lot of twins, and shear band, and the tensile strength, yield stress and elongation of alloy are 314 MPa, 269 MPa and 24.4% respectively. When annealed at 300℃ for 30 min, the rolled...