Invariant line strain theory and its application to the crystallography of solid-state phase transformations |
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| Authors: | LUO Chengping XIAO Xiaoling LIU Jiangwen WU Dongxiao |
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| Institution: | Department of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China,Department of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China,Department of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China,Department of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China |
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| Abstract: | The formation mechanisms of the crystallographic features of phase transformation, including orientation relationship, habit plane, growth direction and transformation strain, are described; the early theoretical studies on the invariant line strain model are summarized; and the details of a "three-dimensional invariant line strain model proposed by one of the authors and his colleague abroad are presented. The experimental results on the crystallographic features of needle-, rod- or lath-shaped precipitates formed in the FCC <=>BCC and HCP <=>BCC precipitation transformations were in excellent agreement with the predictions from the model, thus suggesting that the model could well serve as a phenomenological theory of crystallography for diffusion-controlled phase transformations. |
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| Keywords: | solid-state phase transformation crystallographic feature invariant line strain model phenomenological theory |
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