Ti-Fe-O 合金における応力-ひずみ曲線のひずみ速度依存性

概要

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The effect of strain rate on stress-strain curves of an α-type Ti-Fe-O alloy was investigated at the strain rate between 2.8×10^<-5> to 2.7×10^<-2> S^<-1> at 293K. Zero strain rate curve, "Base Curve" was estimated by multiple interrupted crosshead displacement dwell test every 0.02 strain in case of the strain rates of 2.8×10^<-4> and 2.8×10^<-5>. The relaxation saturated stress-strain points made a single stress-strain curve, "Base Curve". Base Curve and stress-strain curves at various strain rates were parallel. This means the stress-strain curves can be separated into strain dependent component and strain-rate dependent component. When Base Curve is fitted with Swift's equation, the stress-strain curves are interpreted as follows, σ=875.5(0.021+ε)^<0.176>+313.3ε^<0.046>, where σ : Stress (MPa), ε : strain and ε : strain rate.
社団法人日本鉄鋼協会の論文
1996-10-01