文献类型：期刊文献

英文题名：Fracture mechanism of 316L/BNi-2 brazed joints using experiment and microstructure-based model

作者：Duan, Peng-yang[1];Zhou, Guo-Yan[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety MOE, Shanghai 200237, Peoples R China

年份：2023

卷号：101

起止页码：1167

外文期刊名：JOURNAL OF MANUFACTURING PROCESSES

收录：;EI(收录号：20232914400010);WOS:【SCI-EXPANDED(收录号:WOS:001045162600001)】；

基金：The work was supported by National Natural Science Foundation of China (Grant Nos. 51675181 and 52130511) .

语种：英文

外文关键词：Brazed joint; Fracture mechanism; Representative volume element; Instrumented indentation

摘要：Compact components are prone to failure at brazed joints. To ensure the reliability of brazed joints, it is vital to have a comprehensive understanding of the fracture mechanism of brazed joints which can be attributed to highly inhomogeneous microstructures and individual phase mechanical properties. This study measured the stress-strain curve of brazed joint micro-zone of 316L austenitic stainless steel with the BNi-2 filler alloy by a tensile testing machine equipped with a CCD camera. The instrumented indentation technique was used to determine the flow properties of individual phases in joints considering the size effect. Representative volume element (RVE) technology was applied to simulate the mechanical behavior of brazed joints, which was in good agreement with the tested. The fracture of brazed joints can be divided into ductile fracture and brittle fracture which includes the decohesion of the interface between the boride and the austenite matrix and the fragmentation of the boride in terms of the analysis of the morphology of cross-section and fracture surface in brazed joints. According to the stress and strain distribution in the brazing micro-zone, the plastic strain localization cause decohesion, and the stress concentration along the loading direction cause boride fragmentation.