Assessing welding residual stress in A335 P12 steel welds before and after stress-relaxation annealing through instrumented indentation technique |
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| Affiliation: | 1. Frontics Inc., Research Institute of Advanced Materials, Seoul National University, Seoul 151-742, South Korea;2. School of Materials Science and Engineering, Seoul National University, Seoul 151-742, South Korea;1. Key Laboratory of Automobile Materials, Jilin University, Ministry of Education, School of Materials Science and Engineering, Changchun 130022, China;2. College of Mechanical and Electrical Engineering, Changchun Institute of Technology, Changchun 130012, China;1. School of Materials Science and Engineering, University of Science & Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, PR China;2. Qingzhou Construction Quality and Safety Supervision Station, Shandong 262500, PR China;1. Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK;2. National Engineering Research Centre for High-Speed EMU, CRRC Qingdao Sifang Co., Ltd, Qingdao 266111, China |
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| Abstract: | Conventional nondestructive techniques for welding residual stress measurement have many disadvantages in the field because of poor repeatability, large scatter in data, complex procedures, inaccurate results, etc. To overcome these difficulties, an instrumented indentation technique was applied to evaluate the welding residual stress in A335 P12 steel welds in electric power-plant facilities before and after stress-relaxation annealing. Comparison of our results with stress values obtained from a destructive saw-cutting test showed that the instrumented indentation technique is very useful for quantitative/nondestructive evaluation of welding residual stresses in industrial facilities such as power-plants. |
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