研究了不同氮含量的0Cr21Ni6Mn9N奥氏体不锈钢的塑性流变行为.结果表明,其形变强化特性可用Ludwigson模型来表示.钢在不同的应变下表现出不同的塑性流变行为,存在一个瞬变应变.当应变量低于它时,流变行为与Ludwik方程存在一个正偏差;而应变量高于它时,则符合Ludwik模型.造成这一差异的主要原因是位错滑移模式发生了改变,低于瞬变应变时为单系滑移,高于瞬变应变时为多系滑移.氮对位错滑移模式的影响主要表现为对瞬变应变的影响.随氮含量的增加,瞬变应变被推向更高的水平,这意味着氮原子使位错在更大的应变下才产生多系滑移和交滑移.
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