多晶Ni-Mn-Ga磁性记忆合金中间马氏体相变研究

金属功能材料, 2004, 11(1): 9-13. doi: 10.3969/j.issn.1005-8192.2004.01.003

多晶Ni-Mn-Ga磁性记忆合金中间马氏体相变研究

赵增祺 ^1, , 熊玮 ^2, , 吴双霞 ^3, , 王新林 ^4,

1.包头稀土研究院,包头,014010;钢铁研究总院,北京,100081

2.包头稀土研究院,包头,014010

3.包头稀土研究院,包头,014010

4.钢铁研究总院,北京,100081

关键词：中间马氏体相变 , 磁性记忆合金 , 内耗

Study on Intermartensitic Transformation in Polycrystalline Ni-Mn-Ga Magnetic Shape Memory Alloys

用内耗分析方法研究了Ni-Mn-Ga磁性记忆合金的相变行为.发现多晶材料也存在着由温度诱发的完整的热弹性中间马氏体相变.在发生中间马氏体相变过程中,内耗明显增高,同时,弹性模量发生突变,表明相变前和相变后材料的模量有较大的差异.在相变过程中没有观察到软模现象.

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