Low-cycle fatigue behavior of K416B Ni-based superalloy at 650 ℃

作     者：XIE Jun SHU De-long HOU Gui-chen YU Jin-jiang ZHOU Yi-zhou SUN Xiao-feng 谢君;舒德龙;侯桂臣;于金江;周亦胄;孙晓峰

作者机构：Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2021年第28卷第9期

页      面：2628-2635页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Projects(51701212,51771191,51971214)supported by the National Natural Science Foundation of China Project(2019-MS-336)supported by the Liaoning Provincial Natural Science Foundation,China 

主　　题：K416B alloy low cycle fatigue deformation characteristics fatigue cracks 

摘      要：A study on the low-cycle fatigue(LCF)behavior of K 416 B alloy was conducted at 650℃.According to the results,the LCF behavior of K 416 B alloy at 650℃ is mainly manifested as elastic deformation and the fatigue life of the alloy is determined by the level of material *** tension-compression fatigue occurs,the deformation mechanism of the alloy is reflected in the form of dislocation slip,and the deformation dislocations are bowed out in the matrix by Orowan mechanism,which leads to a dislocation configuration similar to the Frawk-Reed *** the late stage of low-cycle fatigue,the fatigue-induced cracks develop from the alloy *** fatigue test proceeds,it is possible for the cracks to continue development along the regions of eutectic and the bulk M 6 C carbide due to stress concentration,thus causing the alloy to show cleavage fracture.