摘要
研究了塑性变形对γ─ＦｅＭｎＡｌＣｒ反铁磁合金电学性能的影响．结果表明，随形变量增加，γ─ＦｅＭｎＡｌＣｒ合金的室温电阻率和剩余电阻率先下降，后增加，在形变量４．８９％处存在电阻率的极小．合金在Ｎｅｅｌ温度（ＴＮ）以上的平均电阻温度系数（ＴＣＲ）随形变而增加，在ＴＮ和电阻极小值温度（Ｔｍｉｎ）之间ＴＣＲ变化不大，而在Ｔｍｉｎ～室温之间ＴＣＲ有明显减小．试验还发现塑性变形对γ─ＦｅＭｎＡｌＣｒ合金的应力灵敏系数影响不大．试验结果表明，γ─ＦｅＭｎＡｌＣｒ合金可能存在某种程度的成分偏聚．
The investigation on the cold deformation dependence of the electric properties for γ-FeMnAlCr alloy shows that, the resistivity at ambient temperature and residual resistivity decreases at first, obtains a resistivity minimum at a deformation of 4.89%, and then increases with increasing in cold deformation. As the deformation increases, the average temperature coefficient of resistivity(TCR) above Neel temperature (TN) increases, but it changes lithe between TN and the resistivity minimum temperature (Tmin), and decreases below Tmin. The deformation appears to have little influence on the stress sensitivity coefficient of resistance. The experimental results show that there may by some extent of inhomogenous distribution in composition for the tested ahoy.
出处
《大连铁道学院学报》
1996年第4期71-73,83,共4页
Journal of Dalian Railway Institute
基金
国家自然科学基金
