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|1999 ||Zhang, M. X., Kelly, P. M. and Gates, J. D. (1999). Study of stress induced martensitic transformation in Fe-Ni-C alloy. In: , The Japan Institute of Metals Proceedings Volume 12 - Solid-Solid Phase Transformations II, PTM'99. International Conference on Solid-Solid Phase Transformations II, PTM'99, Kyoto, Japan, (1032-1035). 24-28 May 1999.|
A model for the stress induced martensitic transformation in an Fe-Ni-C alloy  was further studied. Because the stress induced transformation occurs preferentially in the grains, which are orientated such that the stress axis is close to < 100 >, a texture in the untransformed austenite was effectively generated when the martensite amount is less than 32%. This texture has been experimentally confirmed by X-ray diffraction. According to the model, the first formed martensite variant in a given grain will be the one with the largest stress assistance. As a result of the additional stress field caused by the formation of this first variant, the variant with the second largest stress assistance will form next to the first, which leads to a formation of coupled growth martensite pair. The model predicts that the stress induced coupled growth martensite does not change the overall strain energy. This agrees with the experimental results.
| Dr Jeff Gates, Associate Professor Mingxing Zhang|
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