Research on Fracture Failure of the Underwater Welding Joint

1st International Conference on Frontiers of Materials Synthesis and Processing

材料科学;化学

Kong, Xiangfeng^1,2 ; Qiu, Feng^3 ; Zhang, Jing^1 ; Zou, Yan^1 ; Chu, Dongzhi^1

Institute of Oceanographic Instrumentation, Shandong Academy of Sciences, Qingdao

266000, China^1

College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao

266000, China^2

Nansha Branch Center, Guangdong Entry-Exit Inspection and Quarantine Technology Center, Guangzhou

510623, China^3

关键词: Fracture failure;    Major factors;    Metal structures;    Micro-fracture;    Microstructure characteristics;    Welding joints;    Welding line;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/274/1/012134/pdf
DOI  :  10.1088/1757-899X/274/1/012134

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, by testing welding joints of their metallography and hardness, we analyze the metal structure. And then, the microstructure characteristics, macro and micro fracture morphology of underwater welding joint were investigated by means of metallographical examination and SEM. The fracture failure of the underwater welding joint is discussed here. The cracks are the major factors to fracture failure. The cracks spread along with the crack of the welding line, and this expand process generates dimple. The crack continues to expand under the action of tensile and the fracture fails eventually.