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Dissimilar laser welding of a CoCrFeMnNi high entropy alloy to 316 stainless steel
CoCrFeMnNi 고엔트로피 합금과 316 스테인리스강의 이종 레이저 용접
J.P. Oliveira, Jiajia Shen, Z. Zeng, Jeong Min Park, Yeon Taek Choi, N. Schell, E. Maawad , N. Zhou , Hyoung Seop Kim
Laser weldability of cast and rolled high-entropy alloys for cryogenic applications
극저온 응용 분야를 위한 주조 및 압연 고엔트로피 합금의 레이저 용접성
Hyunbin Nam , Chulho Park , Jongun Moon , Youngsang Na , Hyoungseop Kim , Namhyun Kanga,
Figure 3. Cross sections of CoCuFeMnNi plates laser welded in different process conditions.
Figure 6. a) Low-magnification optical micrograph and b) hardness profile of the welded bead and base material (BM).
Fig. 1. Microstructure of the welded joint: a) SEM macrograph of the welded joint and corresponding EBSD IPF maps of the transition from the HAZ to the BM (b) and transition from the FZ to the HAZ (c) and detailed view of the HAZ (d); e) SEM micrograph of the BM; f) EDS maps the along the full extension of the welded joint. Additional detailed view and corresponding EDS maps of: g) NbC precipitates on the Inconel 718 BM and h) Cr-Mn oxides on the Cantor HEA BM.
Fig. 1. BSE image of the base material microstructure.
Table 2 Chemical composition (wt.%) of MnS-inclusions (indicated with arrows in Fig. 1) determined by EDX analysis.
Fig. 2. EBSD analysis of the base material: (a) crystal orientation map
Fig. 8. Microhardness profile of a butt joint laser beam welded at a laser power level of 2 kW with a welding speed of 5 m/min.
Fig. 1. Microstructure of annealed CrMnFeCoNi (a) SEM-EBSD micrograph and (b) X-ray diffractogram.
Fig. 9. (a) EBSD micrograph (IPF map) of the cross-section of the LW specimen showing the FZ and the BM. (b) detailed EBSD micrograph (Phase map) and (c) (IPF map) from the square region marked in white dots in (a).
Fig. 14. Vickers hardness at 400 μm intervals in the weld cross-section of the LW specimen.
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