Novel Method of Evaluating Residual Stress in Vicinal Welds Based on the Magnetostrictive Technique
Wang, X
Department of Engineering Mechanics, Tsinghua University, Beijing, P. R. China

Li, S
Teaching and Research Section of Metal Manufacturing Process, Fundamental Industry Training Center, Tsinghua University, Beijing, P. R. China

Xie, D
Department of Engineering Mechanics, Tsinghua University, Beijing, P. R. China

Tao, S
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China

(Received 20 August 2003; accepted 12 January 2005)

Abstract
Welding is widely used in engineering structural components and residual stress almost always exists in vicinal welds. In most cases, residual stress impairs the reliability and service life of the welded structure. Therefore, the investigation of residual stress is key to determining the quality of the welding technique. In this paper, a novel method of evaluating residual stress based on the magnetostrictive technique is proposed. Investigations with cruciform specimens and by the hole-drilling method were carried out in order to clarify the reliability of this new method. These results show that the magnetostrictive technique provides accuracy matching that of the hole-drilling method without damage. At the same time, it is more economical compared with the ultrasonic, X-ray, and neutron diffraction methods. Therefore, it is suitable for practical engineering applications. Finally, the results of a practical application are given.

Keywords:
hole-drilling method, magnetostrictive technique, residual stress , spherical tank, vicinal welds, welding structure

Paper ID: JTE12195
DOI: 10.1520/JTE12195

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Author Wang, X Affiliation Department of Engineering Mechanics, Tsinghua University, Beijing, P. R. China Author Li, S Affiliation Teaching and Research Section of Metal Manufacturing Process, Fundamental Industry Training Center, Tsinghua University, Beijing, P. R. China Author Xie, D Affiliation Department of Engineering Mechanics, Tsinghua University, Beijing, P. R. China Author Tao, S Affiliation School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China Author Wang X, Li S, Xie D, Tao S Title Novel Method of Evaluating Residual Stress in Vicinal Welds Based on the Magnetostrictive Technique Symposium , Committee on