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Microscopic phase-field study on growth orientation during the effect of thermal-elastic coupling in nickel based alloy
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Tubular Goods Research Institute of CNPC,Xi’an,Tubular Goods Research Institute of CNPC,Xi’an,The No Institute of Ninth Academy of China Aerospace Science and Technology Corporation,Xi’an,Tubular Goods Research Institute of CNPC,Xi’an,Tubular Goods Research Institute of CNPC,Xi’an,

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    Abstract:

    Based on microscopic phase-field model which is coupling both exterior load and cyclical temperature, growth orientation for phases and distribution of elements during precipitation in nickel based alloy was studied. The result showed that: the effect of cyclical temperature cannot change the growth orientation and the precipitation order of phases. With the effect of cyclical temperature, L12 precipitated first when the content of Al was higher, DO22 precipitated first when the content of V was higher, and both L12 and DO22grew perpendicular to the direction of tensile stress. When tensile stress existed in [001] and L12 precipitated first, DO22 prefer to grow along [100]. When tensile stress existed in [100] and DO22 precipitated first, L122 prefer to grow along [100]. With the reducing of higher temperature of cyclical temperature, the fluctuation range of volume fraction for L12 during cyclical temperature decreased obviously and the fluctuation range of volume fraction for DO22 during cyclical temperature changed a little.

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[Yang Kun, Ji Nan, Sha Ting, Yang fang, Wang Haitao, Chen Zheng. Microscopic phase-field study on growth orientation during the effect of thermal-elastic coupling in nickel based alloy[J]. Rare Metal Materials and Engineering,2017,46(7):1869~1874.]
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History
  • Received:March 20,2015
  • Revised:May 11,2015
  • Adopted:June 11,2015
  • Online: November 14,2017
  • Published: