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α→β Transformation characteristics revealed by pulsed laser-induced non-equilibrium microstructures in duplex-phase Zr alloy

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Abstract

Microstructures of a duplex-phase Zr-2.5Nb alloy treated by pulsed laser were characterized by electron backscatter diffraction (EBSD) and electron channeling contrast (ECC) imaging techniques. Major attention has been paid to non-equilibrium hybrid microstructure consisting of both prior α and β phases, and α plates transformed from new β phases to probe α→β transformation characteristics in the alloy. The origin of the hybrid microstructure is attributed to the specific thermodynamic conditions induced by the pulsed laser treatment. ECC observation shows that newly formed β phases during laser heating prefer to nucleate and grow at the expense of edges of prior α grains rather than their interiors. EBSD analyses further reveal that orientations of the new β phases are not determined by the prior α grains according to the Burgers relationship but maintain those of the prior β phases in an epitaxial growth way.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University of Technology, Chongqing, 400054, China

    LinJiang Chai, ShuYan Wang & Hao Wu

  2. Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China

    Ning Guo & Bo Song

  3. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Northeastern University, Shenyang, 110819, China

    HuCheng Pan

  4. School of Mathematics and Science, Jiangsu University of Science and Technology, Jiangsu, 212003, China

    LiangYu Chen

  5. Department of Nuclear Engineering, North Carolina State University, Raleigh, NC, 27695-7909, USA

    K. L. Murty

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  1. LinJiang Chai
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  2. ShuYan Wang
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  3. Hao Wu
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  4. Ning Guo
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  5. HuCheng Pan
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  6. LiangYu Chen
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  7. K. L. Murty
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  8. Bo Song
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Correspondence to LinJiang Chai or Bo Song.

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Chai, L., Wang, S., Wu, H. et al. α→β Transformation characteristics revealed by pulsed laser-induced non-equilibrium microstructures in duplex-phase Zr alloy. Sci. China Technol. Sci. 60, 1255–1262 (2017). https://doi.org/10.1007/s11431-016-9038-y

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  • DOI: https://doi.org/10.1007/s11431-016-9038-y

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