Journal
MATERIALS SCIENCE AND TECHNOLOGY
Volume 25, Issue 7, Pages 851-861Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/174328408X369384
Keywords
Inconel 718; EN24; Dissimilar metal welds; Friction welding
Funding
- Defence Research and Development Organisation (DRDO)
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Nickel based superalloy Inconel 718 and low alloy steel EN24 are welded by continuous drive friction welding in annealed condition and then post-weld heat treated (PWHT). The welds exhibit low strength and high toughness in the as welded condition. Post-weld heat treatment applicable to either Inconel 718 or EN24, led to reduction in toughness and increase in strength. Toughness degradation after PWHT as per Inconel 718 was predominant. The observed trends in mechanical properties are explained on the basis of observed microstructure, fracture behaviour, electron probe microanalysis and X-ray diffraction.
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