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Surface modification of duplex stainless steel with SiC preplacement using TIG torch cladding

Lailatul, P.H. and Maleque, Md. Abdul (2017) Surface modification of duplex stainless steel with SiC preplacement using TIG torch cladding. In: Advances in Material & Processing Technologies Conference, Chennai, India.

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Abstract

Surface modification of duplex stainless steel is important to make this material suitable for tribological and high temperature applications. The surface modification using fine SiC (20 μm) powder preplacement by TIG torch technique has been performed on the surface of duplex stainless steel. The TIG torch was employed with varying operating welding variables such as welding current of 80 A, 90 A and 100 A and energy input of 648, 768 and 1440 J/mm. The composite surface layer was characterized using Vickers micro-hardness tester and scanning electron microscopy (SEM). Based on the experimental results, it was found that re-solidified composite layer produced maximum hardness of 833.6 Hv0.5kgf from substrate hardness of 250 Hv0.5kgf for TIG processed of 768 J/mm energy input. The microstructure revealed the formation of dendrite phase due to complete melting of SiC in the modified layer. The formation of dendrite contributes to the increase of hardness of this material.

Item Type: Conference or Workshop Item (Plenary Papers)
Additional Information: 6103/56783
Uncontrolled Keywords: Duplex stainless steel; powder preplacement; dendrite; hardness; silicon carbide; tungsten inert gas
Subjects: T Technology > T Technology (General) > T173.2 Technological change
T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
T Technology > TN Mining engineering. Metallurgy > TN600 Metallurgy
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Prof Dr. M A Maleque
Date Deposited: 11 May 2017 09:17
Last Modified: 23 Jun 2017 11:23
URI: http://irep.iium.edu.my/id/eprint/56783

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