Measurement of local material properties and failure analysis of resistance spot welds of advanced high-strength steel sheets
Safety evaluation of resistance spot welds necessitates the accurate measurement of local constitutive properties. This study employed miniature mechanical tests to investigate the deformation and failure behaviors of nugget, heat affected zone (HAZ), and corona bond of resistance spot welded JSC980...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-03-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521000587 |
| _version_ | 1819297879068508160 |
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| author | Yunwu Ma Akira Takikawa Jun Nakanishi Kazuyoshi Doira Tetsuo Shimizu Yongxin Lu Ninshu Ma |
| author_facet | Yunwu Ma Akira Takikawa Jun Nakanishi Kazuyoshi Doira Tetsuo Shimizu Yongxin Lu Ninshu Ma |
| author_sort | Yunwu Ma |
| collection | DOAJ |
| description | Safety evaluation of resistance spot welds necessitates the accurate measurement of local constitutive properties. This study employed miniature mechanical tests to investigate the deformation and failure behaviors of nugget, heat affected zone (HAZ), and corona bond of resistance spot welded JSC980YL steel. A novel mini-peel test was developed to enable local fracture in HAZ for numerical inverse calibration of constitutive parameters. The fracture constants of weld zones calibrated using Cockcroft-Latham ductile failure criterion were incorporated in finite element models to predict the failure modes of spot welds in tensile-shear and cross-tension coupon tests. The result indicates that the ultimate tensile strengths of the nugget and the corona bond were 37.6% higher and 5.8% lower, respectively, than that of the base material. The nugget and HAZ exhibited ductile fracture, whereas the corona bond was brittle fracture with only 1.2% elongation. In the coupon tests, the increase of nugget diameter slowed down the damage accumulation rate in the nugget and accelerated that in the HAZ, resulting in the transition of failure mode from interfacial to pullout. The failure load of corona bond in coupon tests increased with the increase of nugget diameter while its contribution to the peak load decreased. |
| first_indexed | 2024-12-24T05:21:01Z |
| format | Article |
| id | doaj.art-fcefd744ab8e4cad84a98fbbb80f678b |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-24T05:21:01Z |
| publishDate | 2021-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-fcefd744ab8e4cad84a98fbbb80f678b2022-12-21T17:13:27ZengElsevierMaterials & Design0264-12752021-03-01201109505Measurement of local material properties and failure analysis of resistance spot welds of advanced high-strength steel sheetsYunwu Ma0Akira Takikawa1Jun Nakanishi2Kazuyoshi Doira3Tetsuo Shimizu4Yongxin Lu5Ninshu Ma6Joining and Welding Research Institute, Osaka University, Osaka 567-0047, Japan; Corresponding authors.Materials Technology Development Division, Honda R&D Co. Ltd., Tochigi 321-3393, JapanMaterials Technology Development Division, Honda R&D Co. Ltd., Tochigi 321-3393, JapanMaterials Technology Development Division, Honda R&D Co. Ltd., Tochigi 321-3393, JapanJFE Techno-Research Corporation, 1 Kawasaki-cho Chuo-ku, Chiba 260-0835, JapanSchool of Material Science and Engineering, Xi'an Shiyou University, Xi'an 710065, P.R. ChinaJoining and Welding Research Institute, Osaka University, Osaka 567-0047, Japan; Corresponding authors.Safety evaluation of resistance spot welds necessitates the accurate measurement of local constitutive properties. This study employed miniature mechanical tests to investigate the deformation and failure behaviors of nugget, heat affected zone (HAZ), and corona bond of resistance spot welded JSC980YL steel. A novel mini-peel test was developed to enable local fracture in HAZ for numerical inverse calibration of constitutive parameters. The fracture constants of weld zones calibrated using Cockcroft-Latham ductile failure criterion were incorporated in finite element models to predict the failure modes of spot welds in tensile-shear and cross-tension coupon tests. The result indicates that the ultimate tensile strengths of the nugget and the corona bond were 37.6% higher and 5.8% lower, respectively, than that of the base material. The nugget and HAZ exhibited ductile fracture, whereas the corona bond was brittle fracture with only 1.2% elongation. In the coupon tests, the increase of nugget diameter slowed down the damage accumulation rate in the nugget and accelerated that in the HAZ, resulting in the transition of failure mode from interfacial to pullout. The failure load of corona bond in coupon tests increased with the increase of nugget diameter while its contribution to the peak load decreased.http://www.sciencedirect.com/science/article/pii/S0264127521000587Resistance spot weldingCorona bondMiniature tensile testMini-peel testFailure mode prediction |
| spellingShingle | Yunwu Ma Akira Takikawa Jun Nakanishi Kazuyoshi Doira Tetsuo Shimizu Yongxin Lu Ninshu Ma Measurement of local material properties and failure analysis of resistance spot welds of advanced high-strength steel sheets Materials & Design Resistance spot welding Corona bond Miniature tensile test Mini-peel test Failure mode prediction |
| title | Measurement of local material properties and failure analysis of resistance spot welds of advanced high-strength steel sheets |
| title_full | Measurement of local material properties and failure analysis of resistance spot welds of advanced high-strength steel sheets |
| title_fullStr | Measurement of local material properties and failure analysis of resistance spot welds of advanced high-strength steel sheets |
| title_full_unstemmed | Measurement of local material properties and failure analysis of resistance spot welds of advanced high-strength steel sheets |
| title_short | Measurement of local material properties and failure analysis of resistance spot welds of advanced high-strength steel sheets |
| title_sort | measurement of local material properties and failure analysis of resistance spot welds of advanced high strength steel sheets |
| topic | Resistance spot welding Corona bond Miniature tensile test Mini-peel test Failure mode prediction |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521000587 |
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