Behavior of tungsten, molybdenum and alloys under unusual heating conditions

The first part summarizes that state of the art of fabricability of tungsten by powder metallurgical methods for relevant configurations in relation to final properties desired. Effects of anisotropy through metal forming and its relevance to design are discussed. For tungsten-thoria alloys as an example for a refractory ODS alloy mechanical properties such as DBTT for low temperatures, stresses and strength, ductility and microstructural data at temperatures up to 30000K are presented and discussed in context with application considerations. As an alternative tungsten-rhenium alloys containing up to 26% Re are discussed in comparison with tungsten-thoria emphasizing advantages of ductility at low temperatures. A simple model of interaction of heat-dissipation and buildup of thermal stresses in a plate configuration of tungsten is shortly discussed. 10 refs., 14 figs. (Author)