A STUDY OF PHASE TRANSFORMATION IN SHAPE MEMORY ALLOY CuAl9Fe4

Author(s): 

Nguyen Duong Nam1, Vu Anh Tuan1,2, Nguyen Hai Yen1, Dao Van Lap1, and Pham Mai Khanh2, *

Affiliation(s): 

1Viet Nam Maritime University, Hai Phong City, Viet Nam.

2School of Material Science and Engineering, Ha Noi University of Science and Technology, Ha Noi City, Viet Nam.

*Corresponding author email: khanh.phammai@hust.edu

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Microstructure and phase transformation in shape memory alloy Cu-Al (Fe addition: 9% Al, 4 % Fe) were investigated in this study. It is a material capable of restoring its original shape when impacted by a reasonable temperature or cyclic stress and production cost is not too expensive. In many years, shape memory alloys (SMA) based on Cu – Fe is considered to be very attractive to industrial and biomedical applications such as cardiovascular, orthopedic, surgery and production of spare parts and jigs. Original alloy exists β martensite and only exists 〖α^’〗_1 (3R)+ 〖β’〗_1(9R) + 〖γ^’〗_(1 ) (2H) which is finely dispersed homogenously in microstructure after finishing shape memory transformation. Shape memory rate obtained 6%-24% corresponding to each deformation angle before the experiment. Phase transformation between these two phases during deformation as well as the heating-cooling process which create the basis for the unique properties of the alloy.