挤压
材料科学
合金
极限抗拉强度
微观结构
冶金
制作
产量(工程)
纳米尺度
硬化(计算)
纹理(宇宙学)
复合材料
纳米技术
人工智能
病理
替代医学
图像(数学)
图层(电子)
医学
计算机科学
作者
Dongdong Zhang,Hucheng Pan,Jingren Li,Dongsheng Xie,Deping Zhang,Chaojie Che,Jian Meng,Gaowu Qin
标识
DOI:10.1016/j.msea.2021.142565
摘要
Ultrahigh strength is achieved in low-cost Mg-4Sm-0.6Zn-0.4Zr alloy by a traditional extrusion process, with tensile yield strength over 450 MPa, which exceeds the majority of heavy rare-earth (RE) alloyed Mg-RE extrusion alloys. The alloy showed a typical bimodal microstructure, consisting of fine recrystallized grains with random orientations and coarse hot-worked grains with strong basal texture. And profuse Mg3Sm particles were dynamically precipitated in recrystallized grains boundary as well as hot-worked grains interior during extrusion. The ultrahigh yield strength of the alloy is closely related to the combined effect of fine recrystallized grains, highly textural hot-worked grains, and numerous nanoscale particles, independent of the accepted age-hardening in those heavy RE containing Mg alloys. Low cost, high strength, and simple extrusion process make the present alloy gets more fantastic potential in industrial applications than other Mg-RE extrusion alloys.
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