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Superplasticity Enhanced by Two-stage Deformation in a Hot-extruded AZ61 Magnesium Alloy 被引量:1
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作者 yinongwang J.C.Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第1期71-74,共4页
A two-stage strain rate deformation method is proposed to enhance the superplasticity in a hot extruded AZ61 alloy. In the stage-one of deformation, a relatively high strain rate was applied in order to obtain fine gr... A two-stage strain rate deformation method is proposed to enhance the superplasticity in a hot extruded AZ61 alloy. In the stage-one of deformation, a relatively high strain rate was applied in order to obtain fine grains through dynamic recrystallization. The optimum strain rate for DRX at 300℃ was identified as -5×10-3s-1. Stage-two is conducted at relatively low strain rate in order to utilize the fine grains refined by DRX during stage-one to make the grain boundary sliding operate more smoothly, which resulting in enhanced superplastic elongation from 350% to 440%. 展开更多
关键词 AZ61 magnesium alloy SUPERPLASTICITY Dynamic recrystallization Grain boundary sliding
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