Effect of a small amount of additional carbon on the ductility of recrystallized sintered-molybdenum sheet

The ductility of sintered-molybdenum sheet, which had relatively fine recrystallized grains, was examined by means of bend tests at low temperature and observations made by optical microscopy, scanning electron microscopy and transmission electron microscopy. In conclusion, it was shown that a small amount of additional carbon remarkably improved the ductility of molybdenum and also changed the brittle fracture mode. Carbon content and strain-rate dependence of ductile-brittle transition behavior were also reasonably interpreted. (Auth.)