形状记忆合金Ni_(53)Ga_(27)Fe_(17)Co_3的内耗研究  

Study on Internal Friction of Ni_(53)Ga_(27)Fe_(17)Co_3 Shape Memory Alloy

作　　者：程江辉[1] 夏明六[2] 马立群[1] 丁毅[1] 

机构地区：[1]南京工业大学,江苏南京210009 [2]安徽省特种设备检测院铜陵分院,安徽铜陵244000

出　　处：《热加工工艺》2011年第24期76-77,81,共3页Hot Working Technology

摘　　要：采用LMA-1型低频力学谱仪在强迫振动模式下研究了Ni53Ga27Fe17Co3形状记忆合金内耗与温度及变温速率的关系。结果表明,合金在升、降温过程中分别出现逆马氏体相变与马氏体相变内耗峰。由于热弹性马氏体在恒定温度下的共格界面保持稳定,所以内耗峰的峰高与变温速率无关。随变温速率的增大,同一温度下的相转变分数减少,导致马氏体相变内耗峰向低温偏移,逆马氏体相变峰向高温偏移。The effects of temperature and heating/cooling rate on internal friction of the Nis3Ga^Fe^TCo3 alloy were investigated by LMA-1 low frequency mechanical spectrum apparatus inverted torsion pendulum using forced vibration method, respectively. The internal friction peaks were observed in the temperature range where the martensitic and reverse martensitic Wansforrnation took place, and the height of each internal friction peak was independent of heating/cooling rate, because coherent interfaces of thennoelastic martensite kept stable at a constant temperature. As the increase of heating/cooling rate, the quantity of the phase transformation at a certain temperature decreases, leading to the shift of the internal friction peak of martensitic transformation to a lower value, while to a higher value for the internal friction peak of reverse martensitic transformation.

关 键 词：形状记忆合金 内耗 热弹性马氏体 马氏体相变 

分 类 号：TB535.1[理学—物理] TG113.226[理学—声学]