908 鉄基形状記憶合金の逆変態条件におよぼす非比例負荷の影響

概要

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Austenite-start condition is studied experimentally under tension/compression-torsion stress state in an Fe-Mn-Si polycrystalline SMA after non-proportional pre-loading. When the specimen is subjected to a successive axial and shear loads, the martensite variants induced during loading transform back to the parent phase in the subsequent heating process. The austenite-start temperature, determined by monitoring the dilatation curves during heating, can be represented as an austenite-start plane in the axial hold stress-shear hold stress-temperature space. The austenite-start plane rotates around the temperature axis while the shear preload increases. The position of the plane in the stress-temperature space also changes, depending on the amount of shear load.
社団法人日本機械学会の論文
2000-07-31