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热力耦合作用下镍基合金生长取向的微观相场研究
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石油管工程技术研究院,石油管工程技术研究院,中国航天科技集团公司第九研究院第七七一研究所,石油管工程技术研究院,石油管工程技术研究院,西北工业大学

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国家自然科学基金资助(项目号51404294)中国博士后科学基金(项目号2014M562449)陕西省自然科学基础研究计划资助项目(项目批准号2011JQ6017)


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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    摘要:

    基于耦合外应力及交变温度场的微观相场动力学模型,以镍基合金为对象,研究了在沉淀过程中结构相的生长取向及合金元素分配。结果表明:交变温度场不能改变合金的生长取向及结构相的析出顺序。交变温度场条件下,合金Al含量较高时,L12相先析出;V含量较高时,DO22相先析出;拉应力作用时,L12及DO22结构相垂直于应力方向生长。[001]方向拉应力下、L12相先析出时,DO22相在[100]取向上的生长受到促进;当在[100]方向拉应力下、DO22相先析出时,L12相在[001]取向上的生长受到促进。随着交变高温温度的降低,L12相体积分数随温度的波动幅度显著降低而DO22相的变化则相对较小。

    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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杨坤,吉楠,沙婷,杨放,王海涛,陈铮.热力耦合作用下镍基合金生长取向的微观相场研究[J].稀有金属材料与工程,2017,46(7):1869~1874.[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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  • 收稿日期:2015-03-20
  • 最后修改日期:2015-05-11
  • 录用日期:2015-06-11
  • 在线发布日期: 2017-11-14
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