Dependence of strength and fracture behaviour on chemical compositions in spot-welded L-type joints
| Autor: | Miyazaki Yasunobu, Yoshiaki Akiniwa, Hideki Hamatani, Seiji Furusako |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering technology industry and agriculture Metals and Alloys chemistry.chemical_element High strength steel 02 engineering and technology Welding C content 020501 mining & metallurgy law.invention 020901 industrial engineering & automation 0205 materials engineering chemistry Mechanics of Materials law Fracture (geology) Composite material Carbon Joint (geology) Spot welding Weld metal |
| Zdroj: | Welding International. 31:591-603 |
| ISSN: | 1754-2138 0950-7116 |
| DOI: | 10.1080/09507116.2016.1223223 |
| Popis: | In order to achieve lighter and stronger car bodies by applying high strength steel sheets, one of the key technologies is enhancement of joint strength. In this study, we investigated dependence of strength and fracture behaviour on chemical compositions of steels in spot-welded L-type joints in detail. Consequently, the following experimental results were obtained. (1) Maximum load of the joint decreased with increase of carbon (C) and phosphorous (P). The maximum load was decreased by 0.4–0.7 kN with increase of 0.1% in C, with C content ranging from 0.03 to 0.5%, and 0.5 kN with increase of 0.01% in P, with P content ranging from 0 to 0.03%. (2) Fracture portion changed from the outside to the inside of weld metal with increase of C and P. (3) The fracture path was estimated to accord with the solidification segregation site in the weld metal in the case of a steel of 0.2% C, 0.03% P. (4) By implementation of an appropriate post heat during spot welding process for the steel of 0.2% C, 0.03% P... |
| Databáze: | OpenAIRE |
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