Microstructures and mechanical properties of dissimilar joints between cobalt-based superalloy FSX-414 and additively manufactured 316L stainless steel

The joining of superalloy and stainless-steel dissimilar metals is crucial for the fabrication of high-performance gas turbine blades. In this paper, dissimilar welded joints of FSX-414 superalloy/additively manufactured (AM) 316L stainless steel with outstanding strength and toughness were prepared...

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Bibliographic Details
Published in:Materials today communications 2025-01, Vol.42, p.111087, Article 111087
Main Authors: Chen, Yiwen, Jiang, Meiling, He, Chen, Huang, Guoliang, Zhao, Shizhi, Nie, Fuheng, Xiong, Yuanjian, Peng, Xiaoqiang, Huang, Ke
Format: Article
Language:English
Subjects:
AM 316L stainless steel
Dissimilar metals
FSX 414 superalloy alloy
Mechanical properties
TIG welding
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Summary:The joining of superalloy and stainless-steel dissimilar metals is crucial for the fabrication of high-performance gas turbine blades. In this paper, dissimilar welded joints of FSX-414 superalloy/additively manufactured (AM) 316L stainless steel with outstanding strength and toughness were prepared by argon protected tungsten inert gas (TIG) welding. The mechanical properties of the welded joints were exceptional, exhibiting an ultimate tensile strength of 626.2 MPa, a yield strength of 457.7 MPa, and an elongation of 34.9 %. Compared to the AM 316L base material (BM), the strength of the FSX-414/316L dissimilar metals after welding increased by 6.87 %, and compared to the FSX-414 BM, the elongation increased by 2584.61 %. The study provides a valuable reference for preparing high-performance weldments using AM stainless steel and cobalt-based superalloy BMs. [Display omitted]
ISSN:2352-4928
2352-4928
DOI:10.1016/j.mtcomm.2024.111087