K-0737 ステンレス鋼の体積抵抗率のひずみ速度依存性(S10-3 衝撃材料試験における新展開(3))(S10 衝撃材料試験における新展開)

概要

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In order to estimate strain-induced martensite of austenitic stainless steel, it was tried to measure the electric resistivity of the stainless steel after the tension test using the constant current circuit The room or liquid nitrogen temperatures were used in this experiment The high strain rate test was carried out using Split Hopkinson Bar method. Though the resistivity measured after the quasi-static test at liquid nitrogen temperature increased with strain, the resistivity after the high strain rate test at same temperature was almost constant over the strain of 0.2. Both resistivities measured after two strain rate tests at room temperature did not depend on the strain and was almost equal to that before deformation. It was clarified from those results that the resistivity was available as parameter to estimate the phase transformation, since the resistivity was hardly affected on the increase of defect in the grain boundary or dislocation density
一般社団法人日本機械学会の論文
2001-08-22