Effect of joint property differences on residual stresses in electron beam welded joints of Zr-Sn-Nb alloys

ZHAO Yanli; ZHANG Anrui; XIN Yong; YUAN Pan; ZHOU Yi; WANG Houqin; LI He

doi:10.12073/j.hjxb.20231014001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2024 > 45(5): 105-112. > DOI: 10.12073/j.hjxb.20231014001

ZHAO Yanli, ZHANG Anrui, XIN Yong, YUAN Pan, ZHOU Yi, WANG Houqin, LI He. Effect of joint property differences on residual stresses in electron beam welded joints of Zr-Sn-Nb alloys[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(5): 105-112. DOI: 10.12073/j.hjxb.20231014001

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Effect of joint property differences on residual stresses in electron beam welded joints of Zr-Sn-Nb alloys

1.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213
2.
National Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001

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Received Date: October 13, 2023
Available Online: May 16, 2024

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Abstract

Abstract

In order to improve residual stress numerical simulation accuracy of Zr-Sn-Nb alloy electron beam, thermophysical parameters and mechanical properties of Zr-Sn-Nb alloys and welded joints were measured. and the influence of the difference in joint properties on the residual stress of electron beam welded joints was investigated. The hybrid heat source model of electron beam welding is established, and the thermoelastic-plastic finite element method is used to numerically simulate the stress of electron beam welded 4.45 mm thick Zr-Sn-Nb alloy. The simulation model was verify by weld morphology. The results show that the peak transverse residual stresses in the weld and heat-affected zone region on the upper surface of the test plate are higher than those simulated when the properties of the two are the same, with peaks of 319 MPa and 296 MPa, respectively. The peak longitudinal stress was 318 MPa when the differences in the properties of heat-affected zone and the base material and weld are considered, which has little effect on the residual stresses in the joint.
- Zr-Sn-Nb alloy,
- difference in joint properties,
- electron beam welding,
- residual stresses

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Effect of joint property differences on residual stresses in electron beam welded joints of Zr-Sn-Nb alloys