Microstructure and properties of in situ A356/TiB2 composite
(1.上海市上海交通大学金属基复合材料国家重点实验室
2.江苏省苏州市苏州有色金属研究院
3.State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University,Shanghai 200030, China
4.Suzhou Institute for Nonferrous Metal Research, Suzhou 215026, China)
2.江苏省苏州市苏州有色金属研究院
3.State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University,Shanghai 200030, China
4.Suzhou Institute for Nonferrous Metal Research, Suzhou 215026, China)
Abstract: In situ A356/TiB2 composites were successfully fabricated via in-melt reaction among aluminium alloy, K2TiF6 and KBF4 compounds. The composite was examined by using XRD, SEM and EDX techniques. The experimental results reveal that TiB2 are dispersed homogeneously into the aluminium alloy matrix. The mechanical properties of the composites increase significantly with the addition of reinforcement, and the tensile fractography of the composite exhibits to be ductile though the elongation of the composites decreases compared with the unreinforced matrix alloy.
Key words: aluminium matrix composites; in situ; A356 alloy; TiB2; tensile properties