Abstract
This study investigates the influence of the welding parameters on the temperature evolution and the mechanical properties of friction stir butt welded multilayered steel consisting of 15 alternating layers of SUS301 austenitic stainless steel and SUS420J2 martensitic stainless steel with a total thickness of 1.2mm. Large temperature asymmetries between the advancing and retreating side were noticed and a temperature increase was observed as the revolution pitch decreased and the down force increased. With optimized welding parameters defect free welds with an ultimate tensile strength (UTS) of 1240MPa (90% joint efficiency) and a fracture elongation of 13% could be produced. In this case, fracture occurred in the heat affected zone as a result of a very pronounced hardness drop in the martensitic layers. By applying a post-weld heat treatment, the mechanical properties could be enhanced to 1310MPa UTS and a fracture elongation of 22%. This corresponds to a joint efficiency of 95%.
| Original language | English |
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| Title of host publication | Trends in Welding Research - Proceedings of the 9th International Conference |
| Pages | 823-828 |
| Number of pages | 6 |
| Publication status | Published - 31 Jul 2013 |
| Event | 9th International Conference on Trends in Welding Research - Chicago, Illinois, United States Duration: 4 Jun 2012 → 8 Jun 2012 |
Conference
| Conference | 9th International Conference on Trends in Welding Research |
|---|---|
| Country/Territory | United States |
| City | Chicago, Illinois |
| Period | 4/06/12 → 8/06/12 |
ASJC Scopus subject areas
- Mechanical Engineering
- General Materials Science
Fields of Expertise
- Advanced Materials Science