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Susanto, Alexander Eka
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Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Evaluation of stress–relieving heat treatment on mechanical properties and microstructure of friction-welded JIS S45C steel Susanto, Alexander Eka; Haryadi, Gunawan Dwi; Haryanto, Ismoyo; Sulardjaka, Sulardjaka; Nugroho, Sri; Ekaputra, I Made Wicaksana
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6522

Abstract

This research evaluates the effect of stress-relieving post-weld heat treatment (PWHT) on the mechanical properties and microstructure of friction-welded JIS S45C steel joints. The PWHT was conducted at 500 °C for 1 hour. Tensile and Vickers microhardness tests were performed on both as-welded and heat-treated specimens. The tensile tests showed that fracture consistently occurred in the base metal, confirming good weld quality. Stress-relieved specimens showed a 3% increase in elongation compared to the as-welded condition, indicating improved plasticity. The Vickers microhardness tests revealed around 10% decrease in hardness at the weld center zone (from 293 HV to 267 HV) and heat-affected zone (from 245 HV to 224 HV) after treatment. Metallographic observation indicated coarsening of the pearlite phase due to thermal exposure.
Co-Authors Gunawan Dwi Haryadi I Made Wicaksana Ekaputra Ismoyo Haryanto Sri Nugroho Sulardjaka Sulardjaka