331 高 Mn 鉄系合金のγ→εマルテンサイト変態に伴う内部応力とひずみエネルギーの数理解析

概要

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The stress distribution and strain energy have been calculated for two shapes of inclusions, i.e., an oblate spheroid and a hexagonal plate bearing identical uniform transformation strains associated with γ (fcc) ⇾ε (hcp) martensitic transformation in a high Mn ferrous alloy. The stress distribution within the inclusion is constant for the spheroid but shows a maximum near the interface and decreases gradually with a distance from the interface for the hexagonal plate. The stress concentration behavior at the tip of the inclusion is different from each other for these two shapes. The influences of the plate thickness on the stress distribution and strain energy are computed and the results suggest that the hexagonal plate is more realistic in order to discuss the improvement of shape memory effect by alloying or training treatment.
2002-10-10