Effect of Friction Stir Welding on Microstructure and Properties of Micro-TiO_2 doped HSLA Steel

Rasoul Pouriamanesh; Kamran Dehghani; Andreas Hütter; Rudolf Vallant; Norbert Enzinger; Christof Sommitsch

Effect of Friction Stir Welding on Microstructure and Properties of Micro-TiO_2 doped HSLA Steel

Rasoul Pouriamanesh, Kamran Dehghani, Andreas Hütter, Rudolf Vallant, Norbert Enzinger, Christof Sommitsch

Institute of Materials Science, Joining and Forming (3030)

Research output: Chapter in Book/Report/Conference proceeding › Conference paper

Abstract

In this study Friction Stir Welding (FSW) was applied to incorporate TiO2 particles of different volume fractions into HSLA X70 steel to form a composite structure in the nugget zone. The process was performed with and without powders at rotational speeds of 400 to 1000 rpm and traverse speed of 30 mm/min. Microhardness was measured to evaluate the mechanical properties
of the stir zone. The microstructure of the different zones (weld nugget - thermo-mechanically affected zone and head affected zone) was studied by optical and scanning electron microscopy. Different ferrite phases with variable grain sizes were generated in the nugget zone when performing FSW without TiO2 powder. In case of using the powders, the resulting microstructure
was a combination of fine ferrite grains and acicular ferrite which has better mechanical properties. The enhanced properties are attributed to a uniform dispersion of the TiO2 particles in a matrix of ultra-fine grains of ferrite and acicular ferrite.

Original language	English
Title of host publication	41th CWS International conference Welding 2016
Place of Publication	Opatija
Pages	46-55
ISBN (Electronic)	978-953-7518-04-2, Croatien Welding Society
Publication status	Published - 2016
Event	41th CWS International Conference 2016: CWS 2016 - Opatija, Croatia Duration: 8 Jun 2016 → 11 Jun 2016

Conference

Conference	41th CWS International Conference 2016
Country/Territory	Croatia
City	Opatija
Period	8/06/16 → 11/06/16

Fields of Expertise

Advanced Materials Science
Mobility & Production

Treatment code (Nähere Zuordnung)

Basic - Fundamental (Grundlagenforschung)

Cite this

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title = "Effect of Friction Stir Welding on Microstructure and Properties of Micro-TiO_2 doped HSLA Steel",

abstract = "In this study Friction Stir Welding (FSW) was applied to incorporate TiO2 particles of different volume fractions into HSLA X70 steel to form a composite structure in the nugget zone. The process was performed with and without powders at rotational speeds of 400 to 1000 rpm and traverse speed of 30 mm/min. Microhardness was measured to evaluate the mechanical propertiesof the stir zone. The microstructure of the different zones (weld nugget - thermo-mechanically affected zone and head affected zone) was studied by optical and scanning electron microscopy. Different ferrite phases with variable grain sizes were generated in the nugget zone when performing FSW without TiO2 powder. In case of using the powders, the resulting microstructurewas a combination of fine ferrite grains and acicular ferrite which has better mechanical properties. The enhanced properties are attributed to a uniform dispersion of the TiO2 particles in a matrix of ultra-fine grains of ferrite and acicular ferrite. ",

author = "Rasoul Pouriamanesh and Kamran Dehghani and Andreas H{\"u}tter and Rudolf Vallant and Norbert Enzinger and Christof Sommitsch",

year = "2016",

language = "English",

pages = "46--55",

booktitle = "41th CWS International conference Welding 2016",

note = "41th CWS International Conference 2016 : CWS 2016 ; Conference date: 08-06-2016 Through 11-06-2016",

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TY - GEN

T1 - Effect of Friction Stir Welding on Microstructure and Properties of Micro-TiO_2 doped HSLA Steel

AU - Pouriamanesh, Rasoul

AU - Dehghani, Kamran

AU - Hütter, Andreas

AU - Vallant, Rudolf

AU - Enzinger, Norbert

AU - Sommitsch, Christof

PY - 2016

Y1 - 2016

N2 - In this study Friction Stir Welding (FSW) was applied to incorporate TiO2 particles of different volume fractions into HSLA X70 steel to form a composite structure in the nugget zone. The process was performed with and without powders at rotational speeds of 400 to 1000 rpm and traverse speed of 30 mm/min. Microhardness was measured to evaluate the mechanical propertiesof the stir zone. The microstructure of the different zones (weld nugget - thermo-mechanically affected zone and head affected zone) was studied by optical and scanning electron microscopy. Different ferrite phases with variable grain sizes were generated in the nugget zone when performing FSW without TiO2 powder. In case of using the powders, the resulting microstructurewas a combination of fine ferrite grains and acicular ferrite which has better mechanical properties. The enhanced properties are attributed to a uniform dispersion of the TiO2 particles in a matrix of ultra-fine grains of ferrite and acicular ferrite.

AB - In this study Friction Stir Welding (FSW) was applied to incorporate TiO2 particles of different volume fractions into HSLA X70 steel to form a composite structure in the nugget zone. The process was performed with and without powders at rotational speeds of 400 to 1000 rpm and traverse speed of 30 mm/min. Microhardness was measured to evaluate the mechanical propertiesof the stir zone. The microstructure of the different zones (weld nugget - thermo-mechanically affected zone and head affected zone) was studied by optical and scanning electron microscopy. Different ferrite phases with variable grain sizes were generated in the nugget zone when performing FSW without TiO2 powder. In case of using the powders, the resulting microstructurewas a combination of fine ferrite grains and acicular ferrite which has better mechanical properties. The enhanced properties are attributed to a uniform dispersion of the TiO2 particles in a matrix of ultra-fine grains of ferrite and acicular ferrite.

M3 - Conference paper

SP - 46

EP - 55

BT - 41th CWS International conference Welding 2016

CY - Opatija

T2 - 41th CWS International Conference 2016

Y2 - 8 June 2016 through 11 June 2016

ER -