Dissimilar friction stir welding of HSLA steel to austenitic high-Mn TRIP steel

Ricardo Henrique Buzolin, Brianda Rangel Francisco, Erenilton Pereira Da Silva, Victor Ferrinho Pereira, Antonio Jose Ramirez Londono, Omar Maluf, Haroldo Cavalcanti Pinto

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

Abstract

The microstructure and mechanical properties of dissimilar butt-joints between a highstrength low alloyed (HSLA) grade and an austenitic high Mn TRIP steel were investigated. The tool rotation and the tool offset toward the TRIP steel were varied between 300-500 rpm and 1-2 mm, respectively. Tool advancing speed amounted to 100 mm/min. Maximum tension stress was observed for the butt-joint welded with 300 rpm and 2 mm offset. The lowest increase in hardness within the stirred zone also occurred for this FSW condition, indicating that this tool rotation is more promising for welding dissimilar joints of commercial HSLA and high Mn TRIP steels. The weld microstructure consisted mainly of a stirred zone, and neither significant HAZ nor TMAZ are observed. However, two main lobular regions are observed, one at the bottom and another one at the top side of the welds. Besides, the HSLA develops a multiphase microstructure consisting of bainite, martensite and retained austenite phases, whereas no ε/α martensite is found in the stirred zone of the austenitic high-Mn TRIP steel.

Original languageEnglish
Title of host publicationTHERMEC 2016
PublisherTrans Tech Publications Ltd.
Pages2306-2311
Number of pages6
ISBN (Print)9783035711295
DOIs
Publication statusPublished - 1 Jan 2017
Externally publishedYes
Event9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria
Duration: 29 May 20163 Jun 2016

Publication series

NameMaterials Science Forum
Volume879
ISSN (Print)0255-5476

Conference

Conference9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
CountryAustria
CityGraz
Period29/05/163/06/16

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Keywords

  • Dissimilar welding
  • Friction stir welding
  • High Mn steel
  • HSLA steel
  • TRIP steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Buzolin, R. H., Francisco, B. R., Da Silva, E. P., Pereira, V. F., Londono, A. J. R., Maluf, O., & Pinto, H. C. (2017). Dissimilar friction stir welding of HSLA steel to austenitic high-Mn TRIP steel. In THERMEC 2016 (pp. 2306-2311). (Materials Science Forum; Vol. 879). Trans Tech Publications Ltd.. https://doi.org/10.4028/www.scientific.net/MSF.879.2306