中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 Special 1 October 2012 |
（1. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China;
2. School of Materials Science and Engineering, Beihang University, Beijing 100191, China）
Abstract:To further enhance shape memory effect (SME) and improve treatment technique in Fe-based shape memory alloys, an Fe17Mn5Si8Cr5Ni0.5NbC alloy was subjected to electropulsing treatment after pre-deformation. The results show that the shape recovery ratio increases with the amount of pre-deformation up to 10%. The maximum shape recovery ratio after electropulsing treatment is 8% greater than that after ageing at 1073 K. The number of NbC particles induced by electropulsing treatment is increased and the size of the particles is decreased with the amount of tensile pre-deformation up to 10%, and NbC carbides are precipitated more quickly through electropulsing treatment than by ageing.
Key words: shape memory alloys; electropulsing treatment; NbC precipitates; ageing; pre-deformation
