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Materials science & engineering. properties, microstructure and processing. A, Structural materials v.685, 2017년, pp.327 - 331   SCI SCIE
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Three-dimensional microstructure-based micromechanical modeling for TC6 titanium alloy

Li, Guoju (School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China ); Shi, Ran (School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China ); Fan, Qunbo (School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China ); Xia, Yumeng (School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China ); Zhang, Hongmei (School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China );
  • 초록  

    Abstract A new in-depth evaluation of the micromechanical response of TC6 (Ti–6Al–1.5Cr–2.5Mo–0.5Fe–0.3Si) titanium alloy subjected to uniaxial tensile loading is performed based on micromechanical modeling. This evaluation includes reconstruction of the three-dimensional annealed microstructure (annealing at 800°C for 2h, then air cooled) of the alloy via dual-energy micro-computed tomography. In addition, constitutive relations of the constituent phases were determined via synchrotron-based in-situ high-energy X-ray diffraction and a self-consistent model as well as nanoindentation tests combined with finite element modeling. The results revealed that the stress concentration was translated from the primary α phase to the secondary α phase, then to the β phase. Moreover, the stress generated was re-transferred to the primary α phase when the strain was increased from 0.00 to 0.05. This transfer is indicative of crack initiation in the primary α grains.


  • 주제어

    Titanium alloys .   X-ray tomography .   Nanoindentation .   Micromechanical modeling.  

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