蠕变对316LN奥氏体钢晶界宽化与位错变化的影响  

The Effects of Creep on Grain Boundary Broadening and Dislocation of 316LN Austenitic Steel

作　　者：刘状[1] 陈亮维[1] 惠均 裴海祥[2] LIU Zhuang;CHEN Liangwei;HUI Jun;PEI Haixiang(Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;School of Materials Science and Engineering, North University of China, Taiyuan 030051, China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]中北大学材料科学与工程学院,山西太原030051

出　　处：《昆明理工大学学报（自然科学版）》2018年第2期28-31,共4页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51604246)

摘　　要：对316LN不锈钢进行预蠕变试验.在593 K和873 K的温度下,分别在30至120 MPa的应力范围内蠕变2 000 h.蠕变后的样品通过光学显微镜(OM),扫描电子显微镜(SEM)和透射电子显微镜(TEM)观测.结果表明在预蠕变温度由593 K到873 K的变化过程中层错逐渐消失,扩展位错逐渐变窄,氮化物在晶界处聚集,部分晶界发生宽化.Pre-creep tests were carried out on 316 LN stainless steel samples. They were aged for 2 000 h at 593 K and 873 K with a stress ranging from 30 to 120 MPa. The microstructures of the samples after pre-creep were investigated by optical microscope（ OM）,scanning electron microscope（ SEM） and transmission electron microscope（ TEM）. The results show that in the process of the pre-creep temperature changing from 593 K to 873 K,the stacking faults gradually disappeared,the extended dislocations gradually narrowed and some grain boundaries widened.

关 键 词：316LN奥氏体不锈钢 位错 层错能 蠕变 

分 类 号：TG142.7[一般工业技术—材料科学与工程]