【摘要】 由于变形过程中产生应变诱发马氏体相变 ,亚稳奥氏体不锈钢低温下硬化曲线呈 S形。在每隔 1.5 %的工程应变小区间利用 Hollomon公式求得硬化指数 n,发现 n值不是常数。而且 n值和硬化率随应变的增加呈抛物线形变化 ,n值随着应变率的增高相应的减小更多还原

【Abstract】 The hardening curve exhibits sigmoid shape in metastable austenite stainless steel at low temperature due to strain induced martensite transformation during deformation. The hardening exponent n values derived from Hollomon equation in each 1 5% of nominal strain are found not to be constant. Furthermore, both the n values and the hardening rate present parabola with increase of strain, while n values decrease correspondingly with increase of strain rate.更多还原