Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8048160 | Journal of Manufacturing Processes | 2016 | 5 Pages |
Abstract
In the present work, the effects of post weld heat treatment (PWHT) on friction welded UNS S31803 duplex stainless steel samples at three different temperatures namely 1080 °C, 1150 °C and 1200 °C followed by water quenching were studied. Microstructural evaluations such as volume fraction of austenite/ferrite, grain size measurements, SEM-EDS, TEM and microhardness aspects were carried out. The volume fraction of ferrite to austenite ratio was balanced at 1080 °C. Ni element is more effective in controlling the dual phase balance. Finer grains were obtained at 1080 °C due to recrystallization effect. Microhardness was affected by reduction of ferrite percentage. Dual phase presence and absence of precipitates were conformed through XRD and TEM which follow Kurdjumov-Sachs relationship. Under the following: heating pressure: 40 heating time: 4 upsetting pressure: 80 upsetting time: 2 (Experiment no. 5) on PWHT at 1080 °C, the balance of dual phase ratio, finer grains and increased microhardness were obtained.
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Authors
Mohammed Asif. M, Kulkarni Anup Shrikrishna, P. Sathiya,