Characterization of friction stir welded multilayered steel

J. Taendl, N. Enzinger, S. Nambu, J. Inoue, T. Koseki

    Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

    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 languageEnglish
    Title of host publicationTrends in Welding Research - Proceedings of the 9th International Conference
    Pages823-828
    Number of pages6
    Publication statusPublished - 31 Jul 2013
    Event9th International Conference on Trends in Welding Research - Chicago, Illinois, United States
    Duration: 4 Jun 20128 Jun 2012

    Conference

    Conference9th International Conference on Trends in Welding Research
    CountryUnited States
    CityChicago, Illinois
    Period4/06/128/06/12

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Materials Science(all)

    Fields of Expertise

    • Advanced Materials Science

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  • Cite this

    Taendl, J., Enzinger, N., Nambu, S., Inoue, J., & Koseki, T. (2013). Characterization of friction stir welded multilayered steel. In Trends in Welding Research - Proceedings of the 9th International Conference (pp. 823-828)