Local Mechanical Properties of Welded Joint of Zr/Ti Cladding Plate

被引：0
|
作者：
Li Q. [1 ]
Li Z. [1 ]
He X. [1 ]
机构：
[1] School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing
来源：
Xiyou Jinshu/Chinese Journal of Rare Metals | 2020年 / 44卷 / 12期
关键词：
Digital image correlation method; Mechanical properties; Welded joint; Zi/Ti cladding plate;
D O I：
10.13373/j.cnki.cjrm.XY20060027
中图分类号：
学科分类号：
摘要：
Titanium, zirconium and their alloys have high strength and good corrosion resistance, and their application research has developed rapidly in many industrial fields. Zr/Ti cladding plates were prepared by explosive welding, and butt welded joints were prepared by tungsten inert gas welding. The local mechanical properties of welded joint of Zr/Ti cladding plate were studied by microstructure analysis, microhardness test, tensile test, and digital image correlation (DIC) method. The results showed that the microhardness values of the base titanium side and the cladding zirconium side of the welded joint were the highest, with the average values of HV 188.4 and HV 186.3, respectively. The microhardness values decreased gradually from weld zone to base metal zone, and finally stabilized at HV 155 (titanium side) and HV 145 (zirconium side). The stress-strain curves of welded joints obtained by extensometer and DIC method were in good agreement, which indicated that the measurement results of DIC method were reliable. The local stress-strain curves of each region of welded joint were obtained by DIC method. The results showed that the local elastic modulus and yield strength of the base metal were the lowest, which was the weakest area of the welded joint. During the tensile process, the strain concentration occurred in this area, and the local strain extreme value reached 0.5269, which finally caused fracture failure at this position. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
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页码：1240 / 1248
页数：8
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