摘要
运用金相显微镜和电子背散射衍射(electron back-scattered diffraction,EBSD)技术,研究316L奥氏体不锈钢的晶界特征,探讨低能重位点阵晶界对316L奥氏体不锈钢晶间腐蚀敏感性的影响.结果表明:随着低能重位点阵晶界比例的提高,316L奥氏体不锈钢的抗晶间腐蚀性能提高.与母材相比,扩散连接接头含有更高比例的低能重位点阵晶界,即其抗晶间腐蚀性能明显优于母材.另一方面,扩散连接接头的晶粒尺寸远大于母材,晶界处络合物的形成需要更长的时间,因此导致其抗晶间腐蚀能力提高.
Grain boundary character of 316L austenitic stainless steel was investigated by using metallographic microscope and electron back-scattered diffraction （EBSD） technique. The effect of low-energy coincident latticed grain boundary on the susceptibility of 316L austenitic stainless steel to intergranular corrosion was explored. The result showed that the resistance of 316L to intergranular corrosion would be greatly improved by means of increasing ratio of low-energy coincident latticed grain boundary. Compared to the base material, the diffusion bonded joint has much bigger grain size, so that more time is needed to form the complex compounds at grain boundary, leading to its better ability to resist intergranular corrosion.
出处
《兰州理工大学学报》
CAS
北大核心
2016年第4期12-15,共4页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51275225)
关键词
扩散连接接头
晶间腐蚀敏感性
低能重位点阵晶界
孪晶
diffusion bonded joint
＂susceptibility to intergranular corrosion
low-energy coincident latticed grain boundary
twin-induced grain
