Liquid metal induced embrittlement (LMIE) is the reduction of the fracture resistance of a solid material during exposure to a liquid metal. This article discusses the mechanisms and occurrence condition of LMIE and describes the effects of metallurgical factors, such as grain size, temperature and strain rate, stress, inert carriers, and fatigue, on LMIE. It provides a detailed discussion on LMIE in ferrous and nonferrous metals and their alloys. In addition, the article highlights the ways of preventing embrittlement in metals and alloys.
Embrittlement that occurs below the melting point of the embrittling species is known as solid metal induced embrittlement (SMIE) of metals. This article provides a discussion on the characteristics and investigations of SMIE, liquid metal induced embrittlement, and delayed failure. It also describes the mechanism of SMIE.