Effect of Re on W Grain Boundary Cohesion
EMSL Project ID
45390
Abstract
Due to its excellent mechanical and thermal properties, W receives a considerable attention as materials for divertor applications in advanced fusion reactors. However, its usage is critically limited by the ductile-to-brittle transition at 800 C and the recrystallization embrittlement at 1200 C. In fact, the low temperature cracking is a mixture of transgranular and intergranular failure. The ductility and embrittlement issues need to be solved in order to realize a fusion reactor. We propose to study the effect of Re alloying on the intergranular strength of various W grain boundaries. The study will provide insights into the tendency of transgranular and intergranular cracking. Furthermore, systematic knowledge of this effect on different grain boundaries would guide grain boundary engineering to significantly improve the ductility.
Project Details
Project type
Exploratory Research
Start Date
2011-08-25
End Date
2012-08-26
Status
Closed
Released Data Link
Team
Principal Investigator
Related Publications
Setyawan W, and RJ Kurtz. 2012. "Effects of Transition Metals on the Grain Boundary Cohesion in Tungsten." Scripta Materialia 66(8):558-561. doi:10.1016/j.scriptamat.2012.01.002