Shape Memory Effect,Thermal Expansion and Damping Property of Friction Stir Processed NiTip/Al Composite  

作　　者：D.R.Ni J.J.Wang Z.Y.Ma 

机构地区：[1]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang I10016,China [2]College of Material Science and Engineering ShenyangAerospace University,Shenyang 110136,China

出　　处：《Journal of Materials Science & Technology》2016年第2期162-166,共5页材料科学技术（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51101155 and 51331008);the National Basic Research Program of China(No.2012CB619600)

摘　　要：NiTi particles reinforced aluminum （NiTip/Al） composite was prepared via friction stir processing, elimi- nating interfacial reaction and/or elemental diffusion. The NiTip in the composite maintained the intrinsic characteristic of a reversible thermoelastic phase transformation even after heat-treatment. The shape memory characteristic of the NiTip decreased the coefficient of thermal expansion of the Al matrix, and an apparent two-way shape memory effect was observed in the composite. The composite owned a good combination of adjustable damping and thermal physical properties.NiTi particles reinforced aluminum （NiTip/Al） composite was prepared via friction stir processing, elimi- nating interfacial reaction and/or elemental diffusion. The NiTip in the composite maintained the intrinsic characteristic of a reversible thermoelastic phase transformation even after heat-treatment. The shape memory characteristic of the NiTip decreased the coefficient of thermal expansion of the Al matrix, and an apparent two-way shape memory effect was observed in the composite. The composite owned a good combination of adjustable damping and thermal physical properties.

关 键 词：Metal matrix composite Shape memory alloy Interface Differential scanning calorimetry （DSC）Damping 

分 类 号：TB33[一般工业技术—材料科学与工程] TG139.6[金属学及工艺—合金]