Microstructural characterization of high-strength steel lap joint produced by friction spot joining

R. Ohashi, M. Fujimoto, S. Mironov, Y. S. Sato, H. Kokawa

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Friction spot joining (FSJ) was applied to DP590 steel using an uncoated Si3N4 tool without using shielding gases. The microstructural distribution and microstructural evolution of the steel were systematically examined. A defect-free joint exhibited a heterogeneous microstructural distribution, which could be explained mainly by the phase transformation at different peak temperatures during joining. Further, an elliptical region near the pinhole was contaminated by oxygen, silicon, and nitrogen. These contaminants strongly affected the microstructural evolution of the joint.

Original languageEnglish
Pages (from-to)2033-2035
Number of pages3
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume40
Issue number9
DOIs
Publication statusPublished - 2009 Jul 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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