Affiliation:
1. KIMM (Korea Institute of Machinery & Materials)
2. Korea Institute of Materials Science
3. Pukyong National University
4. Dongeui University
5. Korea Institute of Machinery and Materials
Abstract
The effect of post weld heat treatment on mechanical properties of friction welded Alloy
718 and SNCRW was investigated. Friction welding tests were carried out at a constant rotation speed
and pressure. Optimum friction condition was found to be the friction pressure of 25kg/cm2, friction
time of 40sec, upset pressure of 80 kg/cm2, and dwell time of 5sec. After friction welding tests, post
weld heat treatments were performed in the temperature range of 500-900°C for 8hrs in order to
investigate the microstructure and mechanical properties of weld joint. Specimens with the post weld
heat treatment at 720°C for 8hrs show optimal mechanical properties. Residual stress of post weld
heat treated specimens was measured to weld joint in the same temperature range. After friction
welding tests on samples with a diameter of 80mm, tensile properties of post-weld-heat-treated and
non-heat-treated samples were compared.
Publisher
Trans Tech Publications, Ltd.
Cited by
8 articles.
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