208 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(O.S.2-2 非弾性変形)(O.S.2 : 材料・構造物の高温強度と非弾性解析)

概要

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The effect of the level of plastic deformation on the ductile-brittle transition temperature (DBTT: T_c) of sintered molybdenum was examined by the tensile testing. Specimens with four levels of 0, 10, 25 and 50% in thickness reduction (R) were prepared by a rolling at 873 K and tensile tests for smooth and notched specimens were carried out at any desired temperatures between 163 K and 473 K and at a strain rate of 5.5×10^<-3> s^<-1>. The results obtained in this work are summarized as follows: In both the smooth and notched specimens, the transition temperatures were monotonously lowered with increasing the thickness reduction. The presence of an edge notch causes the transition temperature to increase by about 120 K to 160 K over the thickness reduction range of 0% to 50%.
一般社団法人日本機械学会の論文
2001-10-12