Preparation of high-tensile-ductility and high-conductivity alumina dispersion-strengthened copper via a cold spray additive manufacturing-friction stir processing composite process

被引:7
作者
Cui, Lang [1 ,2 ]
Yang, Wenjing [2 ]
Zhang, Long [1 ,2 ]
Hao, Jianjie [1 ,2 ]
Zou, Jie [1 ,2 ]
Zhang, Wei [1 ,3 ]
Jia, Li [1 ,2 ]
Hao, Enkang [2 ]
Zhu, Jihong [1 ]
Liu, Guang [2 ]
机构
[1] Northwestern Polytech Univ, State IJR Ctr Aerosp Design & Addit Mfg, Xian 710072, Peoples R China
[2] Inner Mongolia Met Mat Res Inst, Ningbo 315103, Zhejiang Provin, Peoples R China
[3] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
关键词
Cold spray additive manufacturing; Friction stir processing; Alumina dispersion-strengthened copper; Mechanical properties; Electrical conductivity; MECHANICAL-PROPERTIES; MICROSTRUCTURE; DEFORMATION; CU; PROPERTY; ALLOYS;
D O I
10.1016/j.jallcom.2024.176467
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The solid-state forming capabilities of cold spray additive manufacturing (CSAM) offer a new method for creating nano-reinforced materials. However, the interface of the deposits often fails to form strong metallurgical bonds, leading to mechanical defects that weaken the material. This study investigates the preparation of highly plastic nano-alumina dispersion-strengthened copper by combining CSAM with friction stir processing (FSP), both solidstate techniques. The results show that FSP treatment fuses the interfaces of the deposited particles, transforming the microstructure from multi-scale, elongated grains to a uniform ultrafine-grained (UFG) structure. The average grain size reduces from 3.1 mu m to 0.86 mu m, and the proportion of high-angle grain boundaries increases from 42.5 % to 85.2 %. This treatment significantly enhances both mechanical and electrical properties. The ultimate tensile strength increases from 210 MPa to 450 MPa, elongation at break improves from 1 % to 35 %, and electrical conductivity rises from 70 % IACS to 81 % IACS. These findings demonstrate the potential of the combined CSAM-FSP approach for producing high-performance nano-alumina dispersion-strengthened copper with superior mechanical and electrical properties.
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页数:11
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