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| The Uniaxial Tensile Mechanical Properties of Welded Joints Obtained Based on the DIC Technology |
| Received:May 24, 2021 Revised:June 23, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.01.014 |
| KeyWord:dissimilar metal weld uniaxial tensile stress-strain relationship digital image correlation full-field strain |
| Author | Institution |
| XIANG Wen-xin |
Taishan Nuclear Power Joint Venture Co., Ltd., Jiangmen , China |
| QI Shuang |
Taishan Nuclear Power Joint Venture Co., Ltd., Jiangmen , China;Southwest Jiaotong University, Chengdu , China;Suzhou Nuclear Power Research Institute, Suzhou , China |
| WANG Yong-gang |
Taishan Nuclear Power Joint Venture Co., Ltd., Jiangmen , China |
| NING Fang-mao |
Taishan Nuclear Power Joint Venture Co., Ltd., Jiangmen , China |
| QI Lei |
Taishan Nuclear Power Joint Venture Co., Ltd., Jiangmen , China |
| XUE Fei |
Suzhou Nuclear Power Research Institute, Suzhou , China |
| CAI Li-xun |
Southwest Jiaotong University, Chengdu , China |
| YU Wei-wei |
Suzhou Nuclear Power Research Institute, Suzhou , China |
| MEI Jin-na |
Suzhou Nuclear Power Research Institute, Suzhou , China |
| SHI Jin-hua |
Suzhou Nuclear Power Research Institute, Suzhou , China |
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| Abstract: |
| The purpose of this paper is to obtain the part of tensile mechanical property of dissimilar metal weld joint. For the Taishan III nuclear power plant steam generator nozzle and the safe end to nozzle dissimilar metal weld joint (DMWJ, which nozzle material is 20MND 5 low-alloy steel, the safety end is Z2 CND 18.12 nitrogen-controlled austenitic stainless steel, and the weld material is INCONEL 52 nickel-based alloy), the uniaxial tensile stress-strain relationship of the steam generator nozzle material 20MND 5 was obtained by the isometric round bar tensile test. The DMWJ uniaxial tensile test was obtained by the flat plate tensile test. mechanical properties based on the Digital Image Correlation (DIC) technology. The elastic modulus and yield strength of 20MND 5 are 197 GPa and 498 MPa, respectively. Full-field strain of base metal and weld in DMWJ uniaxial tensile process is consistent with uniaxial tensile properties of DMWJ base metal and local weld positions by comparing with the uniaxial tensile stress-strain relationship of 20MND 5. Therefore, it can be concluded that it is helpful by using the DIC technology to accurately measure the uniaxial stress-strain relationship of the DMWJ, which can be of a great significance for the design, safety assessment and life management of the third-generation pressurized water reactor nuclear power plant. |
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