Characterization of Solidification Cracking in 304HCu Austenitic Stainless Steel Welds

Alloy 304HCu is an austenitic stainless, developed from TP304H with the addition of copper and niobium for power plant applications. Solidification cracking is major issue in welding of austenitic stainless steels. In this paper, solidification cracking behaviour of alloy 304HCu with three different...

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Bibliographic Details
Published in:Transactions of the Indian Institute of Metals 2020-09, Vol.73 (9), p.2345-2353
Main Authors: Ravibharath, R., Muthupandi, V., Bala Srinivasan, P., Devakumaran, K.
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Chemistry and Materials Science
Corrosion and Coatings
Electric power generation
Fillers
High temperature
Materials Science
Mechanical properties
Metallic Materials
Niobium
Original Article
Solidification
Tribology
Welded joints
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Summary:Alloy 304HCu is an austenitic stainless, developed from TP304H with the addition of copper and niobium for power plant applications. Solidification cracking is major issue in welding of austenitic stainless steels. In this paper, solidification cracking behaviour of alloy 304HCu with three different fillers viz., nickel fortified near-matching alloy 304HCu, ER NiCrCoMo-1 and ER NiCrMo-3 using Varestraint weldability testing. The solidification cracking behaviour of the parent material and different welds were assessed under different strain rates and the mechanisms were discussed, addressing the microstructural evolution and compositional changes. The weld materials were characterized for their mechanical properties both at ambient conditions and at elevated temperature, highlighting their usefulness in the power sector.
ISSN:0972-2815
0975-1645
DOI:10.1007/s12666-020-02028-1