Enhanced Mechanical Properties of AA5083 Matrix Composite via Introducing Al_(0.5)CoCrFeNi Particles and Cryorolling  

作　　者：Hao Gu Zhide Li Kaiguang Luo Laxman Bhatta Hanqing Xiong Yun Zhang Charlie Kong Hailiang Yu 

机构地区：[1]State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China [2]College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China [3]Mark Wainwright Analytical Center,University of New South Wales,Sydney,NSW 2052,Australia [4]Light Alloys Research Institute,Central South University,Changsha 410083,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2022年第6期879-889,共11页金属学报（英文版）

基　　金：financially supported by the National Key Research and Development Program(Grant No.2019YFB2006500);the Huxiang High-Level Talent Gathering Project of HUNAN Province(Grant No.2018RS3015);Innovation Driven Program of Central South University(Grant No.2019CX006);the Science and Technology Innovation Program of Hunan Province(Grant No.2020RC2002);the Natural Science Foundation of Hunan Province(Grant No.2021JJ40774);the Fundamental Research Funds for the Central Universities of Central South University(Grant No.2021zzts0150);the Research Fund of the Key Laboratory of High Performance Complex Manufacturing at Central South University。

摘　　要：High-entropy alloy particles(HEAPs)can markedly enhance the mechanical properties of metal matrix composites(MMCs).In this study,AA5083/Al_(0.5) CoCrFeNi HEAPs MMCs with diff erent HEAPs contents(0,1,and 3 wt%)were prepared via a stir-casting,and then these MMCs sheets were hot rolled(573 K)and cryorolled(77 K),respectively.The mechanical properties of the MMCs sheets were measured by tensile testing and microhardness test.Additionally,their microstructures were analyzed by scanning electron microscopy and transmission electron microscopy.Results revealed that the ultimate tensile strength(UTS)of the as-cast AA5083/Al_(0.5) CoC rF eN i HEAPs MMCs were improved from 203 to 257 MPa by adding 3 wt%HEAPs.And the mechanical properties of the MMCs sheets were improved after cryorolling.After cryorolling with 50%rolling reduction ratio,the MMCs with 1 wt%HEAPs had an UTS of 382 MPa,which was 1.9 times that of the MMCs before rolling.Finally,the strengthening mechanisms of HEAPs and cryorolling on the AA5083/HEAPs MMCs were discussed.

关 键 词：Metal matrix composite CRYOROLLING Mechanical properties High-entropy alloy particle 

分 类 号：TG335.8[金属学及工艺—金属压力加工]