期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2020.139926
关键词
Mg alloy; Mechanical property; Bimodal microstructure; Dynamic recrystallization
类别
资金
- Fundamental Research Funds for the Central Universities [2020CDJDPT001, 2019CDCGCL316]
Mg-0.4Al-xMn (x = 0, 0.3 and 1.5, in wt.%) have been produced by conventional one-step extrusion process. Mg-0.4Al-0.3Mn exhibits a simultaneously high tensile yield strength of 239 MPa and high fracture elongation (FE) of 30.1%. Besides, Mg-0.4Al-1.5Mn exhibits an extraordinary FE of 52.5% with a reasonable yield stress of 170 MPa. The Mn-containing alloys show a bimodal microstructure where the un-dynamically recrystallized (unDRXed) regions remain extruded fiber texture while the grains in the dynamically recrystallized (DRXed) regions exhibit fine grain size (similar to 1 mu m) and random orientation, instead of essentially DRXed grains in Mg-0.4Al with relatively coarse grain size (4.75 mu m) and strong texture. Alloying Mn is expected to result in precipitates of alpha-Mn and Al8Mn5 in the alloys, which alters the behaviors of recrystallization nucleation and grain growth during extrusion and therefore the different microstructure formed in the Mg alloys with various Mn addition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据