SuperplaSticity and superplastic instability of AZ31B magnesium alloy sheet

来源 :中国有色金属学会会刊:英文版 | 被引量 : 0次 | 上传用户:qingxu007
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AZ31B 镁合金表的 Superplastic 变丑机制被调查。216% 的最大的延伸和 0.36 的紧张率敏感是获得的 at723 K 和 1 X l0~ 的紧张率(-3)s~(-1) 。动态再结晶发生在早变丑阶段,这被发现,并且滑动的那条谷物边界是主导的变丑模式 ofsuperplastic AZ31B 表,其破裂由于洞的生长和通匝,在谷物边界起核心作用。一个洞生长模型象损坏变量的临界数值一样被证实,并且损坏典型参数被识别以便提供镁合金表的塑料形成技术能在上被优化的理论地面。
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