摘要
利用动态拉伸台和SEM对两种高氮奥氏体不锈钢进行了动态拉伸的微观形貌原位观察 实验表明滑移和孪生在高氮奥氏体中同时存在;随着形变量的增加,晶粒内部的滑移线加宽,逐步成为微裂纹;而晶界的结合力较强,没有观察到沿晶断裂;氮的加入会产生固溶强化和间隙强化,增大点阵滑移的阻力,从而降低奥氏体不锈钢的塑性 随着氮含量的增加。
By using the equipment of dynamic tensile and SEM, the microstructures of two kinds of high nitrogen austenitic stainless steels are observed. Results show that both the glide and twinning exist during the dynamic tensile experiment. The glide lines stretch to the whole crystal and are broadened with the dynamic tensile going on and finally become microfracture. The adhesion of crystal boundary is strong and no intergranular fracture is observed. Solution and intermetallic enforcement are induced by adding nitrogen, which will also make the crystal gliding harder and reduce the plasticity of austenitic stainless steel.
出处
《江苏大学学报（自然科学版）》
EI
CAS
2003年第3期62-65,共4页
Journal of Jiangsu University：Natural Science Edition
基金
江苏省"青蓝"工程人才基金资助项目
