摘要
采用金相法、XRD和热膨胀法研究了经1 150℃固溶10min后的空冷态Fe_(43.6)Mn_(34.7)Al_(13.4)Ni_(8.3)合金的逆向记忆效应。结果表明:空冷态Fe_(43.6)Mn_(34.7)Al_(13.4)Ni_(8.3)合金在400℃至700℃之间呈现显著的逆向记忆效应,其源于α→γ相变。在α→γ相变时,依附于γ′马氏体形成的板条状γ相以及与γ′马氏体成一定角度的针状γ相对逆向记忆效应的贡献显著大于蠕虫状γ相。
The reverse shape memory effect in an air cooled Fe43.6 Mn34.7 Al13.4 Ni8.3 alloy after solution treatment at 1150 ℃ for 10 min was investigated by optical metallography, XRD and thermal dilatometer. Results showed that the air cooled Fe43.6 Mn34.7 Al13.4 Ni8.3 alloy presented an obvious reverse shape memory effect when the heating temperatures were between 400 ℃ and 700℃. The reverse shape memory effect derives from the α→γ transforma- tion. During this phase transformation, the lath γ＇ phase precipitated along the γ＇ martensite and the needle γ phase precipitated along a certain angle with the γ＇ martensite were much more beneficial for the reverse shape memory effect than the vermiculate γ phase.
出处
《金属功能材料》
CAS
2016年第3期31-36,共6页
Metallic Functional Materials
基金
四川省应用基础研究计划资助(2016JY0061)
