Effect of Annealing Temperature on the Shape Memory Properties of Cold-Rolled Dual-Phase Ni-Mn-Ga-Gd Alloy
来源期刊：Acta Metallurgica Sinica2015年第11期
论文作者：Xin Zhang Qing-Suo Liu Xian-Shun Zeng Jie-He Sui Wei Cai Ai-Lian Liu
文章页码：1403 - 1406
摘 要：The influence of annealing temperature on the shape memory effect（SME） and recovery ratio of cold-rolled dual-phase Ni58Mn25Ga16.9Gd0.1 high-temperature shape memory alloy were investigated.The results showed that the SME can be improved by appropriate annealing.SME of 6.0%and recovery ratio of 98%were observed in the rolled alloy at 550 ℃ annealing,which were larger than that of the samples annealed at other temperatures.The annealing temperature was in between the recrystallization temperatures of the martensite and γ phase,which leads to the work-hardening state ofγ phase kept unchanged during annealing process,and therefore,the critical slip stress of γ phase increased.Thus,the plastic deformation of γ phase reduced during the compression process,and the SME increased.
Xin Zhang1，Qing-Suo Liu1，Xian-Shun Zeng1，Jie-He Sui2，Wei Cai2，Ai-Lian Liu3
1. School of Materials Science and Engineering,Tianjin University of Technology2. National Key Laboratory Precision Hot Processing of Metals,Harbin Institute of Technology3. College of Material Science and Engineering,Heilongjiang University of Science and Technology
摘 要：The influence of annealing temperature on the shape memory effect（SME） and recovery ratio of cold-rolled dual-phase Ni58Mn25Ga16.9Gd0.1 high-temperature shape memory alloy were investigated.The results showed that the SME can be improved by appropriate annealing.SME of 6.0%and recovery ratio of 98%were observed in the rolled alloy at 550 ℃ annealing,which were larger than that of the samples annealed at other temperatures.The annealing temperature was in between the recrystallization temperatures of the martensite and γ phase,which leads to the work-hardening state ofγ phase kept unchanged during annealing process,and therefore,the critical slip stress of γ phase increased.Thus,the plastic deformation of γ phase reduced during the compression process,and the SME increased.
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