CAJ | 학술논문

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.
유우변형과정중산생응변유발마씨체상변, 아은오씨체불수강저온하경화곡선정S형. 재매격1.5%적공정응변소구간이용Hollomon공식구득경화지수n, 발현n치불시상수. 이차n치화경화솔수응변적증가정포물선형변화, n치수착응변솔적증고상응적감소.
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.