Dissimilar Metal Joining of 304 Stainless Steel to SMA490BW Steel Using the Filler Metal Powders with a High-Entropy Design

Dejia Liu; Rui Guo; Yong Hu; Mingxue Shen; Yanchuan Tang; Longzhi Zhao; Deying Li; Xiangjie Wang

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자료유형: 학술저널

저자정보: Dejia Liu (East China Jiaotong University) Rui Guo (East China Jiaotong University) Yong Hu (East China Jiaotong University) Mingxue Shen (East China Jiaotong University) Yanchuan Tang (East China Jiaotong University) Longzhi Zhao (East China Jiaotong University) Deying Li (East China Jiaotong University) Xiangjie Wang (Hubei Polytechnic University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.26 No.6

발행연도: 2020.1

수록면: 854 - 866 (13page)

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High-entropy alloys having excellent properties are particularly suitable for the application as the filler metals in welding. In the present study, multi-component mixed powders of FeCoCrNiMn and CrFeNi2.4Al0.6,based on a high-entropy design,as well as the comparative 316L stainless steel powders, were used as the filler metals, to achieve the dissimilar weldingbetween 304 stainless steel and SMA490BW steel by laser deposition welding. By comparative analysis of the microstructureand mechanical properties of three types of joints, the feasibility and weld-ability of the filler metal powders based on ahigh-entropy design were studied. It was found that the melting of base metal (BM) and weld metal dilution had an impacton the set high-entropy component in the weld zone. And high-entropy structures were achieved in the weld zone by usingthe powders of CrFeNi2.4Al0.6. Compared to the BM of SMA490BW steel, three types of joints presented a higher notchedtensile strength and had a better corrosion resistance. The joint welded using the powders of CrFeNi2.4Al0.6had the lowesthardness value in the weld zone, in which the joint was fractured during the notched tensile tests. The other two jointsfractured near the notch in the SMA490BW steel side. Transgranular fracture and a typical dimple fracture were observedin the fractured joints.

#High-entropy filler metals · Laser deposition welding · Microstructure · Hardness · Notched tensile tests

참고문헌 (44)

참고문헌 신청

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