2相先析出；V含量較高時(shí),DO22相先析出；拉應(yīng)力作用時(shí),L12及DO22結(jié)構(gòu)相垂直于應(yīng)力方向生長(zhǎng)。[001]方向拉應(yīng)力下、L12相先析出時(shí),DO22相在[100]取向上的生長(zhǎng)受到促進(jìn)；當(dāng)在[100]方向拉應(yīng)力下、DO22相先析出時(shí),L12相在[001]取向上的生長(zhǎng)受到促進(jìn)。隨著交變高溫溫度的降低,L12相體積分?jǐn)?shù)隨溫度的波動(dòng)幅度顯著降低而DO22相的變化則相對(duì)較小。"/>

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熱力耦合作用下鎳基合金生長(zhǎng)取向的微觀相場(chǎng)研究
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石油管工程技術(shù)研究院,石油管工程技術(shù)研究院,中國(guó)航天科技集團(tuán)公司第九研究院第七七一研究所,石油管工程技術(shù)研究院,石油管工程技術(shù)研究院,西北工業(yè)大學(xué)

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國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)51404294)中國(guó)博士后科學(xué)基金(項(xiàng)目號(hào)2014M562449)陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃資助項(xiàng)目(項(xiàng)目批準(zhǔn)號(hào)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:

    基于耦合外應(yīng)力及交變溫度場(chǎng)的微觀相場(chǎng)動(dòng)力學(xué)模型,以鎳基合金為對(duì)象,研究了在沉淀過(guò)程中結(jié)構(gòu)相的生長(zhǎng)取向及合金元素分配。結(jié)果表明：交變溫度場(chǎng)不能改變合金的生長(zhǎng)取向及結(jié)構(gòu)相的析出順序。交變溫度場(chǎng)條件下,合金Al含量較高時(shí),L12相先析出；V含量較高時(shí),DO22相先析出；拉應(yīng)力作用時(shí),L12及DO22結(jié)構(gòu)相垂直于應(yīng)力方向生長(zhǎng)。[001]方向拉應(yīng)力下、L12相先析出時(shí),DO22相在[100]取向上的生長(zhǎng)受到促進(jìn)；當(dāng)在[100]方向拉應(yīng)力下、DO22相先析出時(shí),L12相在[001]取向上的生長(zhǎng)受到促進(jìn)。隨著交變高溫溫度的降低,L12相體積分?jǐn)?shù)隨溫度的波動(dòng)幅度顯著降低而DO22相的變化則相對(duì)較小。

    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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楊坤,吉楠,沙婷,楊放,王海濤,陳錚.熱力耦合作用下鎳基合金生長(zhǎng)取向的微觀相場(chǎng)研究[J].稀有金屬材料與工程,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
  • 錄用日期:2015-06-11
  • 在線發(fā)布日期: 2017-11-14
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