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Microstructure and Properties of SiCp/Al Composite Mater-ials Fabricated via Powder Packed Resistance Additive Manufacturing
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Affiliation:

1.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang330031, China;2.Institute of Special Equipment Inspection and Research, Jiangxi General Institute of Testing and Certification, Nanchang330029, China;3.Jiangxi Sinohexaco Helicopter Co., Ltd, Jingdezhen333032, China;4.Jiangxi Haoyu Heavy Industry Co., Ltd, Ruijin341000, China

Fund Project:

National Natural Science Foundation of China (52205375); Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province (20204BCJ23003); Jiangxi Provincial Natural Science Foundation (20224BAB214010, 20232BAB204049, jxsq2019201118)

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    Abstract:

    SiC particle (SiCp)/Al composite materials were fabricated via powder packed resistance seam welding additive manufacturing. The influence of welding speed on microstructure and mechanical properties of the specimen was investigated, elucidating the formation and fracture mechanism of single-pass multi-layer deposition. The results demonstrate that a dense internal structure of the specimen characterized by uniformly dispersed SiCp embedded within the Al matrix is formed. However, particle agglomeration and porosity defects are observed. The porosity increases with the increase in welding speed, and the microstructure of the RSAM-24 specimen has the highest density, characterized by a density of 2.706 g/cm3 and a porosity of 1.672%. The mechanical properties of the specimens decrease as the welding speed increases. Optimal mechanical properties are obtained when the welding speed is set as 24 cm/min. Specifically, the average hardness, tensile strength and elongation values are 463.736 MPa, 52.16 MPa and 2.2%, respectively. The tensile specimens predominantly exhibit fracture along the interlayer bonding interface and the interface between the Al matrix and SiC particles, and the damage mode is ductile fracture.

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[Wang Wenqin, Chen Jigen, Yan Xiaosong, Han Zhaoxian, Lin Gang, Chen Jie. Microstructure and Properties of SiCp/Al Composite Mater-ials Fabricated via Powder Packed Resistance Additive Manufacturing[J]. Rare Metal Materials and Engineering,2024,53(11):3035~3045.]
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History
  • Received:January 12,2024
  • Revised:October 15,2024
  • Adopted:June 19,2024
  • Online: November 18,2024
  • Published: November 08,2024