Microstructure and mechanical properties of micro/nano B4C particle reinforced 6061Al matrix composites

被引：0
|
作者：
Liu R. [1 ]
Wang W. [2 ]
Zhao W. [2 ]
机构：
[1] College of Aeronautics and Astronautics, Taiyuan University of Technology, Taiyuan
[2] College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 10期
关键词：
Composites; Fracture mechanism; Friction-wear; Interface; Micro/nano B[!sub]4[!/sub]C;
D O I：
10.13801/j.cnki.fhclxb.20201209.002
中图分类号：
学科分类号：
摘要：
Micro/nano B4C particle reinforced 6061Al composites with three volume fractions (3vol%, 5vol%, 7vol%) were prepared by advanced powder metallurgy technology (spark plasma sintering +hot extrusion). The microstructure evolution at different stages was observed by SEM, TEM and EBSD. The nano-indentation behavior, tensile properties and friction and wear properties were also tested. Results show that B4C particles distribute in a network structure after sintering, and the B4C particles are dispersed uniformly after extrusion. The nano-B4C particles are distributed in the grains and grain boundaries. The pinning effect of nano-B4C on the dislocation accumulates a large number of dislocations in the matrix, which provides driving force and overrides the dynamic recovery. Finally, the recrystallization ratio reaches 74%. When the volume fraction of B4C is 3vol%, the tensile strength, yield strength and elongation of as-extruded B4C/6061Al composites are 219 MPa, 88 MPa and 22.5%, and a large number of dimples appear in the fracture morphology. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：3394 / 3401
页数：7
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