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

doi:10.4028/www.scientific.net/MSF.879.2306

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^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-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 language	English
Title of host publication	THERMEC 2016
Publisher	Trans Tech Publications Ltd.
Pages	2306-2311
Number of pages	6
ISBN (Print)	9783035711295
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.879.2306
Publication status	Published - 1 Jan 2017
Externally published	Yes
Event	9th International Conference on Processing and Manufacturing of Advanced Materials: Thermec 2016 - Stadthalle Graz, Graz, Austria Duration: 29 May 2016 → 3 Jun 2016 https://www.tugraz.at/events/thermec-2016/home/

Publication series

Name	Materials Science Forum
Volume	879
ISSN (Print)	0255-5476

Conference

Conference	9th International Conference on Processing and Manufacturing of Advanced Materials
Abbreviated title	THERMEC 2016
Country/Territory	Austria
City	Graz
Period	29/05/16 → 3/06/16
Internet address	https://www.tugraz.at/events/thermec-2016/home/

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

Access to Document

10.4028/www.scientific.net/MSF.879.2306

Cite this

Buzolin, RH, Francisco, BR, Da Silva, EP, Pereira, VF, Londono, AJR, Maluf, O & Pinto, HC 2017, Dissimilar friction stir welding of HSLA steel to austenitic high-Mn TRIP steel. in THERMEC 2016. Materials Science Forum, vol. 879, Trans Tech Publications Ltd., pp. 2306-2311, 9th International Conference on Processing and Manufacturing of Advanced Materials, Graz, Austria, 29/05/16. https://doi.org/10.4028/www.scientific.net/MSF.879.2306

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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.",

keywords = "Dissimilar welding, Friction stir welding, High Mn steel, HSLA steel, TRIP steel",

author = "Buzolin, {Ricardo Henrique} and Francisco, {Brianda Rangel} and {Da Silva}, {Erenilton Pereira} and Pereira, {Victor Ferrinho} and Londono, {Antonio Jose Ramirez} and Omar Maluf and Pinto, {Haroldo Cavalcanti}",

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AU - Londono, Antonio Jose Ramirez

AU - Maluf, Omar

AU - Pinto, Haroldo Cavalcanti

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N2 - 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.

AB - 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.

KW - Dissimilar welding

KW - Friction stir welding

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KW - TRIP steel

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

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Access to Document

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