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The preferred formation and crystallographic analysis of three-variant cluster in Zr-Cr-Fe alloy during martensitic transformation
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College of Materials Science and Engineering,Chongqing University

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    Abstract:

    The martensitic microstructure of Zr-Cr-Fe alloy after β-quenching are investigated by a combination of electron channeling contrast imaging (ECC), transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD) techniques. All of theoretical 12 α variants inherited from one single β phase have been obtained in the current study that revealed strict Burgers orientation relationship (BOR) with respect to β parent phase. The entire martensitic microstructure consisting of these 12 α variants in the as-quenched Zr-Cr-Fe alloy can be divided into four sub-regions or morphological groups. Each sub-region, in turn, is dominated by only one type of three-variant cluster (one crystallographic group composed of three α variants) showing the self-accommodation triangular morphologies. These three variants from individual cluster share a common pole of β parent phase and are related to each other by an angle/axis pair . The preferred formation of such three-variant cluster is ascribed to the elastic interaction between variants to achieve the largest degree of self-accommodation.

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[Wang Jianmin, Liang Yuyang, Qiu Risheng, Luan Baifeng, Murty Korukonda L, Liu Qing. The preferred formation and crystallographic analysis of three-variant cluster in Zr-Cr-Fe alloy during martensitic transformation[J]. Rare Metal Materials and Engineering,2019,48(2):426~432.]
DOI:10.12442/j. issn.1002-185X.20170671

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History
  • Received:July 31,2017
  • Revised:September 04,2017
  • Adopted:September 12,2017
  • Online: March 15,2019
  • Published: