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Vol.42, No.3, 259 ~ 267, 2004
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| Title |
| Computational Model for Mechanically Induced Martensite Transformation of Metastable Austenite |
| 한흥남 Han Heung Nam , 이창길 Lee Chang Gil , 김성준 Kim Seong Jun , 오창석 O Chang Seog , 이태호 Lee Tae Ho |
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| Abstract |
| A computational model, which can describe the mechanically-induced martensite transformation of metastable austenite, is suggested. The strain originated from the transformation of metastable austenite into martensite is evaluated by assessing the difference of the nucleation rate of variants, which was determined from the interaction energy between externally applied stress state and lattice deformation based on the K-S relationship. A self-consistent model with the Eshelby`s solution is employed to predict the deformation behavior. A simple iterative calculation was carried out to predict the stress-strain behaviors under the uniaxial stress state. The calculated results are compared with the experimental data for various strain rates. Good agreement is found between the calculated and experimental values of transformation kinetics and stress-strain behavior. |
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| Key Words |
| Mechanically-induced martensite transformation, Metastable austenite, Self-consistent model, K-S relationship |
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