Microstructure and mechanical characterization of friction stir welded high strength low alloy steels

R. Ramesh, I. Dinaharan, Ravi Kumar, E. T. Akinlabi

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

Friction stir welding (FSW) is a promising technique to join HSLA steels without the problems encountered during fusion based welding processes. In the present work, 3 mm thick HSLA plates were successfully welded using FSW. A tool made of tungsten-rhenium alloy was used in this work. The relationship between microstructure and tensile strength was studied under various welding conditions i.e. change in traverse speed (57–97 mm/min). The microstructure of the weld nugget revealed the presence of upper bainite and fine ferrite phases. The amount of upper bainite reduced with increase in traverse speed. EBSD images showed a reducing trend for grain size. The details of hardness, tensile strength and bending test were reported.

Original languageEnglish
Pages (from-to)39-46
Number of pages8
JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume687
DOIs
Publication statusPublished - 27 Feb 2017

Keywords

  • Friction stir welding
  • High strength low alloy steel
  • Microstructure
  • Tensile strength

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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