TY  - JOUR
AU  - Shen, Jiajia
AU  - Kim, Rae Eon
AU  - He, Jingjing
AU  - Lopes, Joao
AU  - Yang, Jin
AU  - Zeng, Zhi
AU  - Schell, N.
AU  - Kim, Hyoung Seop
AU  - Oliveira, Joao Pedro
TI  - Gas tungsten arc welding of CoCrFeMnNi high entropy alloy to 316 stainless steel
JO  - Materials science & engineering / A
VL  - 922
IS  - 147664
SN  - 0921-5093
CY  - Amsterdam
PB  - Elsevier
M1  - PUBDB-2024-07675
SP  - 147664 
PY  - 2025
AB  - In this study, an as-annealed CoCrFeMnNi high entropy alloy (HEA) was successfully gas tungsten arc-welded(GTA-welded) to 316 stainless steel, resulting in a fully penetrated joint and free of visible macroscopic de-fects. In the heat-affected zone (HAZ) on the 316 stainless steel side, a phase transformation from δ-BCC to σphase was detected. On the CoCrFeMnNi side, the base material (BM) primarily exhibited an FCC matrix phase,with a slight increase in Cr-Mn oxide content upon entering the HAZ. The formation of the BCC phase in thefusion zone (FZ) was mainly attributed to the mixing of Fe from the 316 stainless steel. This region exhibited thehighest hardness, resulting from a combination of factors, including the BCC precipitates and minor incorpo-ration of carbon introduced within the FZ, further aided by solid solution strengthening due to BMs mixing, butsolid solution strengthening is the key factor. The BMs and the adjacent HAZs displayed highly similar equiaxedgrain structure and size, and the hardness distributions, making it difficult to distinguish each region. However,the evolution of interplanar spacing obtained through synchrotron X-ray radiation effectively differentiated thevarious regions of the joint. Tensile testing revealed that the strength and hardness of this dissimilar joint werelower than those of both BMs, yet it still shows potential for structural applications. The fracture site of the jointoccurred in the HAZ on the 316 stainless steel side, primarily due to the combined effects of localized largeplastic deformation in the soft region and stress concentration caused by the presence of σ phase
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001388775500001
DO  - DOI:10.1016/j.msea.2024.147664
UR  - https://bib-pubdb1.desy.de/record/619482
ER  -