因瓦效应及因瓦合金的研究现状

Development of invar effect and invar alloy

因瓦效应的研究从其发现至今一直方兴未艾，但对其反常的热膨胀机理仍未完全清楚。回顾了百余年来因瓦效应的研究进程，并对其反常的热膨胀机理研究理论及新型因瓦合金的研究进展进行了简要阐述。

Even though the study of the ＇invar effect＇ has a long history, the origins of the thermal expansion anomaly and of some exotic behaviors of invar alloy have not yet been fully understood. In this paper some theoretical studies on the invar effect and discoveries of new invar-type alloys over the past few years have been explained.