材料科学
各向异性
合金
微观结构
晶体孪晶
高熵合金
打滑(空气动力学)
延展性(地球科学)
扫描电子显微镜
复合材料
光学
蠕动
热力学
物理
作者
Wei Zhang,Hui Wang,Bart J. Kooi,Yutao Pei
标识
DOI:10.1016/j.msea.2023.144978
摘要
A non-equiatomic interstitial-strengthened high entropy alloy (iHEA), Fe49.5Mn30Co10Cr10C0.5 (at.%), is manufactured by laser powder-bed fusion (LPBF) with stripe and chessboard scanning strategies. The present study highlights the correlation between the laser scanning strategies with resulting microstructure, textures, and anisotropic mechanical properties in as-built iHEA. The results show that the LPBF processed iHEA exhibits an excellent strength-ductility synergy due to the combined deformation mechanisms of dislocation slip, martensite phase transformation- and nano twinning-induced plasticity. The samples printed by the stripe scanning strategy show more evident mechanical anisotropy than that of the chessboard-scanned samples. The difference in the degree of mechanical anisotropy is mainly attributed to the heterogeneous grain morphology and crystallographic texture resulted from different scanning strategies.
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