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首页> 外文会议>Riso international symposium on materials science >Enhanced mechanical properties in fully recrystallized ultrafine grained ZKX600 Mg alloy
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Enhanced mechanical properties in fully recrystallized ultrafine grained ZKX600 Mg alloy

机译：完全重结晶的超细晶粒ZKX600 Mg合金的增强的机械性能

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Mg-Zn-Zr-Ca (ZKX600) alloy specimens with various fully recrystallized grain sizes ranging from 0.77 um to 23.3 um were fabricated by high pressure torsion (HPT) followed by subsequent annealing. Tensile tests carried out at room temperature revealed that ultrafine grained (UFG) specimens exhibited enhanced combinations of strength and ductility compared to their coarse-grained counterparts. Observation of deformation microstructures suggested that basal slip and {10-12} extension twinning were the dominant mechanisms during deformation of coarse grained specimens, while deformation twinning was significantly inhibited in the UFG specimens. Based on the observations it is proposed that non-basal slip activity is responsible for the enhanced mechanical properties, and should be the focus of further investigations.
机译：Mg-Zn-Zr-Ca（ZKX600）合金试样通过高压扭转（HPT）进行了随后的退火处理，这些试样具有从0.77 um到23.3 um的各种完全重结晶晶粒尺寸。在室温下进行的拉伸试验表明，与粗粒试样相比，超细粒（UFG）试样显示出强度和延展性的增强组合。变形微观结构的观察表明，基底滑移和{10-12}延伸孪生是粗粒试样变形过程中的主要机制，而UFG试样则明显抑制了变形孪生。根据观察结果，提出非基层滑移活动是增强机械性能的原因，应成为进一步研究的重点。

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