Yang Mingbo, Yang Hui, Tang Liwen, et al. Microstructure and Compression Deformation Behaviour of AZ91D Magnesium Alloy following Semi-solid Isothermal Heat Treatment[J]. Special Casting & Nonferrous Alloys, 2008,(S1):375-377.
Yang Mingbo, Yang Hui, Tang Liwen, et al. Microstructure and Compression Deformation Behaviour of AZ91D Magnesium Alloy following Semi-solid Isothermal Heat Treatment[J]. Special Casting & Nonferrous Alloys, 2008,(S1):375-377.DOI：
半固态等温热处理AZ91D镁合金的显微组织及压缩变形行为
摘要
研究了AZ91D镁合金半固态等温热处理后的组织及其压缩变形行为。结果表明
AZ91D镁合金经570℃×60min半固态等温热处理后
枝晶组织特征已不明显。此外
AZ91D镁合金经570℃×60min半固态等温热处理后
半固态压缩应力在压缩应变近似为0.025时达到最大值
然后随着压缩应变的增加而逐渐减小
最后几乎保持不变;进一步
其半固态压缩变形应力还随着变形温度降低或变形速率增加而增加。
Abstract
Semi-solid isothermal heat treatment is thought to be a potential method for the manufacturing of magnesium alloys slurry with nondendritic structure. The present work investigates the microstructure and the compression deformation behaviour of AZ91D magnesium alloy following semi-solid isothermal heat treatment. The research results indicate that
after treated at 570 ℃ for 60 min
the dendritic structure of AZ91D alloy becomes unobvious. In addition
with the compression strain increasing the semi-solid compression stress of AZ91D alloy treated at 570 ℃ for 60 min rapidly reaches a maximium value when the compression strain is about 0.025
then the compression stress gradually decreases and finally kept a constant stress level. Furthermore
with the deformation temperature or rate increasing
the semi-solid compression stress of AZ91D alloy treated at 57 0℃ for 60 min decreases and increases
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