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Friction welding is a solid-state joining process which is applied extensively because of its advantages such as low heat input, efficient application, ease in manufacturing, and environmental friendliness. The present study investigates the mechanical and metallurgical properties of UNS S32205 duplex stainless steel friction-welded joints. The process parameters, namely friction pressure, upsetting pressure, and rotational speed are individually varied from low level to high level (within the range of the machine setup) and their effects on the joint properties are analyzed. The partial-deformation zone had higher hardness than the weld and base metal. The toughness of the joints was evaluated at room temperature and at subzero temperature conditions. The impact toughness of the friction-welded joints was found to be superior to fusion-joined duplex stainless steel in room and cryogenic conditions.


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Characterization of microstructure, toughness, and chemical composition of friction-welded joints of UNS S32205 duplex stainless steel

Show Author's information Puthuparambil Madhavan AJITH1Paulraj SATHIYA1( )Sivanandam ARAVINDAN2
Department of Production Engineering, National Institute of Technology Tiruchirappalli-620015, Tamilnadu, India
Department of Mechanical Engineering, Indian Institute of Technology Delhi New Delhi-110016, India

Abstract

Friction welding is a solid-state joining process which is applied extensively because of its advantages such as low heat input, efficient application, ease in manufacturing, and environmental friendliness. The present study investigates the mechanical and metallurgical properties of UNS S32205 duplex stainless steel friction-welded joints. The process parameters, namely friction pressure, upsetting pressure, and rotational speed are individually varied from low level to high level (within the range of the machine setup) and their effects on the joint properties are analyzed. The partial-deformation zone had higher hardness than the weld and base metal. The toughness of the joints was evaluated at room temperature and at subzero temperature conditions. The impact toughness of the friction-welded joints was found to be superior to fusion-joined duplex stainless steel in room and cryogenic conditions.

Keywords: microstructure, hardness, friction welding, duplex stainless steel, toughness

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Publication history

Received: 13 December 2013
Revised: 23 January 2014
Accepted: 14 February 2014
Published: 11 March 2014
Issue date: March 2014

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