Stress-Induced Martensitic Transformation of Zr_(50)Cu_(25)Ni_(10)Co_(15) Nanocrystals Embedded in an Amorphous Matrix  

作　　者：W.H.Gao X.Y.Yi X.L.Meng G.Song W.Cai L.C.Zhao 

机构地区：[1]School of Materials Science and Engineering, Harbin Institute of Technology [2]Department of Mechanical Engineering, University of Houston

出　　处：《Journal of Materials Science & Technology》2017年第3期276-280,共5页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 51171052 and 51322102);National Basic Research Program of China (973 Projects) (Nos. 2011CB012904 and 2012CB619400);Doctoral Program Foundation of Institutions of Higher Education of China (No. 20112302130006);the Fundamental Research Funds for the Central Universities (HIT. BRET Ⅲ 20120the1);the State Key Lab of Advanced Metals and Materials (2015-Z01)

摘　　要：The stress induced martensitic phase transformation of spherical ZrCu nanocrystals embedded in an amorphous matrix was studied in this paper. Microstructural observations revealed that the martensitic transformation of the nanocrystal was hindered by the surrounding amorphous coating. The existence of two-step transformation from the austenite phase（B2） to the base structure martensite（B19＇） and finally to the most stable superstructure martensite（Cm） was also demonstrated. The Cm martensite with（021） type I twinning symmetrically accommodation was surrounded by the B19＇ martensite with dislocation morphologies.The stress induced martensitic phase transformation of spherical ZrCu nanocrystals embedded in an amorphous matrix was studied in this paper. Microstructural observations revealed that the martensitic transformation of the nanocrystal was hindered by the surrounding amorphous coating. The existence of two-step transformation from the austenite phase（B2） to the base structure martensite（B19＇） and finally to the most stable superstructure martensite（Cm） was also demonstrated. The Cm martensite with（021） type I twinning symmetrically accommodation was surrounded by the B19＇ martensite with dislocation morphologies.

关 键 词：Nanocrystals ZrCu Martensitic phase transformation Shape memory Transmission electron microscopy 

分 类 号：TG139.6[一般工业技术—材料科学与工程]