Abstract
The authors study a new solid-state spot joining process, friction bit joining (FBJ), which relies on the use of a consumable joining bit. It has been reported that FBJ is feasible for the joining of steel/steel and aluminum/steel, but the metallurgical characteristics of the joint for enhancement of the properties and reliability remain unclear. Therefore, this study produced friction bit joints in DP980 steel and then examined the microstructures in the joint precisely. In this article, the microstructure distribution associated with hardness in the friction-bit-joined DP980 steel and the microstructural evolution during FBJ are reported.
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Acknowledgments
The authors are grateful to Messrs. M. Mosley and A. Honda for technical assistance. They also thank Mr. M. Matsunaga for helpful discussions. Financial support from the Japanese Ministry of Education, Science, Sports and Culture with a Grant-in-Aid from the Global COE program of the Materials Integration International Center for Education and Research at Tohoku University is gratefully acknowledged. Two of the authors (MPM and KK) acknowledge support from NSF Grant No. CMMI-0834729.
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Manuscript submitted March 31, 2008.
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Huang, T., Sato, Y., Kokawa, H. et al. Microstructural Evolution of DP980 Steel during Friction Bit Joining. Metall Mater Trans A 40, 2994–3000 (2009). https://doi.org/10.1007/s11661-009-0016-x
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DOI: https://doi.org/10.1007/s11661-009-0016-x