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 Effects of void and inclusion sizes on mechanical response and failure mechanism of AlCrCuFeNi2 high-entropy alloy
Tác giả hoặc Nhóm tác giả: Dinh-Quan Doan, Te-Hua Fang, Tao-Hsing Chen, Thi-Xuyen Bui
Nơi đăng: Engineering Fracture Mechanics (Elsevier); Số: 252;Từ->đến trang: 107848;Năm: 2021
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
The effects of various void sizes, inclusion sizes, and strain rates on the mechanical response, deformation behavior, and failure mechanism of AlCrCuFeNi2 high-entropy alloy samples with a pre-void/inclusion under the tension are investigated via the molecular dynamics. The results reveal that there exists a critical value of mechanical parameters such as the tensile strength and Young’s modulus in the tension of sample with an inclusion size of 15 Å, where the mechanistic parameters are changed. Meanwhile, the mechanical parameters decrease under increasing the void size and reducing the strain rate. The deformation behavior discloses that the void and inclusion are the principal cause of initial strain, and the shear bands are propagated inside the workpiece along the direction of an angle of 45° related to the tensile axis.
ABSTRACT
The effects of various void sizes, inclusion sizes, and strain rates on the mechanical response, deformation behavior, and failure mechanism of AlCrCuFeNi2 high-entropy alloy samples with a pre-void/inclusion under the tension are investigated via the molecular dynamics. The results reveal that there exists a critical value of mechanical parameters such as the tensile strength and Young’s modulus in the tension of sample with an inclusion size of 15 Å, where the mechanistic parameters are changed. Meanwhile, the mechanical parameters decrease under increasing the void size and reducing the strain rate. The deformation behavior discloses that the void and inclusion are the principal cause of initial strain, and the shear bands are propagated inside the workpiece along the direction of an angle of 45° related to the tensile axis.
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