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Title: Microstructure Evolution and Charpy Toughness Relationship of A-TIG Weld Fusion Zone for Varying Tempering Time
Authors: Vidyarthy R.S.
Dwivedi D.K.
Published in: Transactions of the Indian Institute of Metals
Abstract: In the present research work, activating flux tungsten inert gas (A-TIG) weld joints of AISI 409 ferritic stainless steel was subjected to post weld heat treatment at 750 °C followed by the air cooling. To study the effect of tempering time on the microstructural and mechanical properties of the weld fusion zone, tempering time was varied from 2 to 10 h. The current study also demonstrated the comprehensive microstructure–mechanical property relationships using the collective techniques of optical and electron microscopy, electron dispersive X-ray analysis techniques, and X-ray diffraction analysis. The results indicated that the Charpy toughness of the fusion zone improved after 2 and 4 h of tempering, but the further stretch in tempering time resulted in a drastic drop in Charpy toughness. The shape of the sulphide inclusions was found to be an important factor in deciding the Charpy toughness of the A-TIG weld fusion zone. Maximum impact energy of 116 ± 9 J was observed by the sample tempered for 4 h. © 2018, The Indian Institute of Metals - IIM.
Citation: Transactions of the Indian Institute of Metals (2018), 71(5): 1287-1300
Issue Date: 2018
Publisher: Springer
Keywords: 409 FSS
Charpy toughness
ISSN: 9722815
Author Scopus IDs: 57188881635
Author Affiliations: Vidyarthy, R.S., School of Mechanical Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, India
Dwivedi, D.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttrakhand 247667, India
Funding Details: Acknowledgements The authors gratefully acknowledge the financial support provided to this study by the Board of Research in Nuclear Sciences (BRNS) under the Grant No. 36(2)/14/70/2014-BRNS/10416, India.
Corresponding Author: Vidyarthy, R.S.; School of Mechanical Engineering, Kalinga Institute of Industrial TechnologyIndia; email:
Appears in Collections:Journal Publications [ME]

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