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Mechanisms and Microstructure Characteristics of Dynamic Recrystallization in Metallic Materials
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Chinalco Material Applications Research Institute Co. LTD

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    Abstract:

    <sub></sub><sub>:</sub><sub>Dynamic</sub> <sub>r</sub><sub>ecrystallization</sub><sub> has been considered as an important process for microstructure optimization of metallic materials. In this paper, three different mechanisms of d</sub><sub>ynamic</sub> <sub>r</sub><sub>ecrystallization</sub><sub> (DRX), including </sub><sub>discontinuous DRX (DDRX)</sub><sub>, </sub><sub>continuous DRX</sub><sub> (DDRX) and g</sub><sub>eometric </sub><sub>DRX(</sub><sub>GDRX</sub><sub>), are </sub><sub>summarize</sub><sub>d by illustrating typical metallic materials. Microstructure characteristics, including </sub><sub>m</sub><sub>isorientation</sub><sub>d</sub><sub>istributions</sub><sub>, </sub><sub>misorientation</sub><sub> accumulation patterns</sub><sub>, grain size and its relationship to flow stress, are described </sub><sub>in detail</sub><sub>. Based on the microstructure evolution of </sub><sub>Ti-24Ni-4Zr-8Sn</sub><sub> alloy and Ti-25Nb-3Zr-</sub><sub>3Mo-2Sn</sub><sub> alloy, the author suggest that, besides the </sub><sub>essential</sub><sub> properties having a critical influence on DRX mechanism and </sub><sub>microstructure</sub><sub> evolution, the </sub><sub>special</sub><sub> deformation condition namely a certain matching of temperature, strain rate and strain, also result in </sub><sub>multiple</sub><sub> dynamic </sub><sub>r</sub><sub>ecrystallization</sub><sub>s</sub><sub>. </sub>

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[Tian Yuxing, Liu Cheng. Mechanisms and Microstructure Characteristics of Dynamic Recrystallization in Metallic Materials[J]. Rare Metal Materials and Engineering,2019,48(11):3764~3769.]
DOI:10.12442/j. issn.1002-185X.20180719

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History
  • Received:July 05,2018
  • Revised:August 20,2018
  • Adopted:August 30,2018
  • Online: December 10,2019
  • Published: