電子ビーム溶解した純タンタルの力学的特性

概要

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Tensile mechanical properties of electron beam melted pure tantalum plate were investigated. Principal results obtained from the present investigation were as follows; (1) Marked yielding behaviors followed by localized flow that leads to a falling of stress and lower fracture strength were observed. (2) Strain rate dependences of electron beam melted pure tantalum were more evident than those of pure tantalum by powder metallurgy. (3) Activation energy of tensile flow showed slightly lower value than those of powder metallurgy pure tantalum. (4) Activation volume of dislocation motion showed slightly a plastic strain dependence and almost the same level value with those of powder metallurgy pure tantalum. (5) Frequency factor of the dislocation motion showed relatively higher value of 10^<10> to 10^<11> s^<-1> and a little effect of the plastic strain.
一般社団法人日本機械学会の論文
1994-12-25