焼結モリブデンの延性-脆性遷移温度に及ぼす圧延圧下率の影響

概要

論文の詳細を見る
Sintered molybdenum plate was rolled in one pass at 873 K to specimens with four degrees of 0, 10, 25 and 50% in thickness reduction. Tensile tests for the smooth and notched specimens were carried out to examine the effects of the level of plastic deformation and the edge notch on the change of ductile-brittle transition temperature (DBTT). The specimens were pulled at various temperatures between 163 K and 473 K and at a strain rate of 5.5×10^<-3>s^<-1>. Consequently, molybdenum could be deformed without any detectable defect up to 50% reduction in thickness by the rolling. For both of the smooth and notched specimens, the ductile-brittle transition temperatures were monotonously lowered with increasing the thickness reduction. The presence of an edge notch caused an increase of transition temperature by about 120 K to 160 K in a thickness reduction range of 0% to 50%.
一般社団法人日本機械学会の論文
2003-07-25