Effect of filler metals on creep properties of 2.25Cr-1Mo steel weld joints prepared by TIG process

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Ittiphol Phonpud
Prapas Muangjunburee
Thawatchai Plookphol
Buntoeng Srikarun


This research aims at comparing creep properties obtained on welding 2.25Cr-1Mo steel using ER90S-G and ERNiCrMo-3 filler metals by TIG or GTAW process. The samples were preheated at 250 °C for 30 minutes and post-weld heat-treated at 690 °C for 1 hour. The high temperature accelerated creep rupture test of 2.25Cr-1Mo welded samples was investigated over 139 to 315 MPa stress range at temperatures of 550, 600, and 650 °C. The service lifetime of the welded materials can be predicted using the extrapolation of Larson-Miller parameter. Creep surface fracture was investigated using SEM consisted of dimple ruptures and micro-voids coalescence in the fibrous matrix of the intercritical region of HAZ. Similar high-temperature creeps service lives were found in both welded materials.

Article Details

บทความวิจัย (Research Article)
Author Biography

Prapas Muangjunburee, Department of Mining and Materials Engineering, Faculty of Engineering, Prince of Songkla University

2005 Doctor in Philosophy (Engineering) The University of Liverpool, United Kingdom


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