Synergistic Enhancement of the Strength-Ductility for Stir Casting SiCp/2024Al Composites by Two-Step Deformation

Fu‑xiang Cao; Kun‑kun Deng; Cui‑ju Wang; Kai‑bo Nie; Wei Liang; Jian‑feng Fan

doi:10.1007/s12540-020-00928-x

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자료유형: 학술저널

저자정보: Fu‑xiang Cao (Taiyuan University of Technology) Kun‑kun Deng (Taiyuan University of Technology) Cui‑ju Wang (Taiyuan University of Technology) Kai‑bo Nie (Taiyuan University of Technology) Wei Liang (Taiyuan University of Technology) Jian‑feng Fan (Taiyuan University of Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.12

발행연도: 2021.12

수록면: 5,450 - 5,461 (12page)

DOI: 10.1007/s12540-020-00928-x

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The 10 μm 10 vol% SiCp/2024Al composites sheet was successfully fabricated by semi-solid stir casting followed withtwo-step deformation (extrusion and rolling). The two-step thermal deformation solves the sheet rolling formability of theSiCp/2024Al composites produced by stir casting. Compared with the SiCp/2024Al composites prepared by traditional powdermetallurgy, this paper innovatively studied the synergistic enhancement between CuAl2phase and SiCpon the mechanicalproperties. The result shows that the two-step deformation can significantly improve the uniformity of the distribution of SiCpand CuAl2phases. At the same time, the average size of the SiCpand CuAl2phase decreases after the two-step deformation. During the hot extrusion, SiCphas an obvious hindrance to the refinement of the CuAl2phase. Moreover, the SiCp/2024Alcomposites sheet exhibits excellent yield strength (295 MPa), ultimate tensile strength (489 MPa), and elongation (10.42%). The performance improvement of SiCp/2024Al after two-step thermal deformation is mainly attributed to the improvedinterface bonding strength of SiCp-2024 Al matrix, the refined SiCpand the more uniform distribution of SiCp.

#Metal-matrix composites #Stir-casting #Aluminum alloy #Deformation #Al2Cu particles #Mechanical properties

참고문헌 (40)

참고문헌 신청

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