应变速率对304奥氏体不锈钢应变硬化行为的影响

摘要

304 stainless steel is non -steady -state austenitic stainless.In the process of strain hardening , strain temperature,strain rate,strain amount,etc.can change the amount of strain -induced martensite transformation and conversion rate .Also,the internal organization of the slip lines ,deformation twins,dis-locations and stacking fault density can change in volume and in the rate ,which shows a different strain hardening behavior.For 304 austenitic stainless steel,we mainly study its strain hardening behavior on normal atmospheric temperature from the strain rate sensitivity index ,strain hardening exponent two as-pects.%　　304不锈钢属于非稳态奥氏体不锈钢，在应变强化过程中，应变温度、应变速率、应变量等均可改变应变诱发马氏体的转变量和转变速率及内部组织滑移线、形变孪晶、位错和层错密度的转变量和转变速率，从而表现出不同的应变硬化行为。针对304奥氏体不锈钢，主要从应变速率敏感指数、应变硬化指数两方面，研究了应变速率对其室温应变硬化行为的影响。