75Al14Cr11合金;原子間相互作用勢(shì)"/> 75Al14Cr11合金第一個(gè)近鄰到第四個(gè)近鄰Ni-Al原子間相互作用勢(shì)對(duì)L10預(yù)析出相沉淀過程的影響。結(jié)果表明,當(dāng)?shù)谌廚i-Al原子間相互作用勢(shì)增大或第四種近鄰Ni-Al原子間相互作用勢(shì)減少時(shí),L10預(yù)析出相和L12平衡相均提前沉淀,且L10預(yù)析出相體積分?jǐn)?shù)減少而L12相的最終體積分?jǐn)?shù)幾乎不變;當(dāng)?shù)谌廚i-Al原子間相互作用勢(shì)減少或第四近鄰Ni-Al原子間相互作用勢(shì)的增大時(shí),L10預(yù)析出相和L12最終相都會(huì)推遲沉淀,且L10預(yù)析出相和L12相體積分?jǐn)?shù)均增大;與上述兩種情況相比,改變第一近鄰Ni-Al原子間相互作用勢(shì)對(duì)L10預(yù)析出相沉淀過程的影響較小,而改變第二近鄰Ni-Al原子間相互作用勢(shì)對(duì)沉淀過程幾乎沒有影響。進(jìn)一步研究表明,Ni-Al原子間相互作用勢(shì)改變不影響合金的沉淀機(jī)制,將影響L10預(yù)析出相、L12平衡相的析出時(shí)間、速度和兩種相的體積分?jǐn)?shù),沉淀形貌等,從而影響Ni75Al14Cr11高溫合金的結(jié)構(gòu)和性能,對(duì)合金優(yōu)化設(shè)計(jì)有指導(dǎo)意義。"/>

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相場(chǎng)法研究Ni-Al間作用勢(shì)對(duì)Ni75Al14Cr11合金L10預(yù)析出相的影響
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1.浙江師范大學(xué)工學(xué)院;2.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)51501165);浙江省自然科學(xué)基金一般項(xiàng)目(LY18E010002和Y18E050011);浙江省基礎(chǔ)公益研究計(jì)劃項(xiàng)目(LGG18E050010)資助


Phase-field simulation for influence of Ni-Al interatomic potential on L10 pre-precipitation phase of Ni75Al14Cr11 alloy
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    摘要:

    采用微觀相場(chǎng)法研究了Ni75Al14Cr11合金第一個(gè)近鄰到第四個(gè)近鄰Ni-Al原子間相互作用勢(shì)對(duì)L10預(yù)析出相沉淀過程的影響。結(jié)果表明,當(dāng)?shù)谌廚i-Al原子間相互作用勢(shì)增大或第四種近鄰Ni-Al原子間相互作用勢(shì)減少時(shí),L10預(yù)析出相和L12平衡相均提前沉淀,且L10預(yù)析出相體積分?jǐn)?shù)減少而L12相的最終體積分?jǐn)?shù)幾乎不變;當(dāng)?shù)谌廚i-Al原子間相互作用勢(shì)減少或第四近鄰Ni-Al原子間相互作用勢(shì)的增大時(shí),L10預(yù)析出相和L12最終相都會(huì)推遲沉淀,且L10預(yù)析出相和L12相體積分?jǐn)?shù)均增大;與上述兩種情況相比,改變第一近鄰Ni-Al原子間相互作用勢(shì)對(duì)L10預(yù)析出相沉淀過程的影響較小,而改變第二近鄰Ni-Al原子間相互作用勢(shì)對(duì)沉淀過程幾乎沒有影響。進(jìn)一步研究表明,Ni-Al原子間相互作用勢(shì)改變不影響合金的沉淀機(jī)制,將影響L10預(yù)析出相、L12平衡相的析出時(shí)間、速度和兩種相的體積分?jǐn)?shù),沉淀形貌等,從而影響Ni75Al14Cr11高溫合金的結(jié)構(gòu)和性能,對(duì)合金優(yōu)化設(shè)計(jì)有指導(dǎo)意義。

    Abstract:

    The influence of Ni-Al interatomic potential from the first-nearest neighbor to the fourth-nearest neighbor on the precipitation process of L10 pre-precipitation phase in Ni75Al14Cr11 alloy was investigated by the Microscopic Phase-Field method. As the third-nearest Ni-Al interatomic potential increases or the fourth-nearest interatomic potential decreases, L10 pre-precipitation phase and L12 phase appears in advance; besides, the volume fraction of L10 pre-precipitated phase decreases while the final volume fraction of L12 phase almost remains unchanged. Whereas the opposite, L10 pre-precipitation phase and L12 phase appears later; besides, the volume fraction of both phases increases. Compared with the above two, the first-nearest interatomic potential has the less impact and the second-nearest Ni-Al interatomic potential has the least impact on the precipitation process of L10 pre-precipitation phase and L12 phase. Further research shows that Ni-Al interatomic potential does not affect the precipitation mechanism of the alloy and will affect the precipitation time, speed, volume fraction and precipitation morphology of L10 pre-precipitation phase and L12 equilibrium phase, thus affecting the structure and properties of Ni75Al14Cr11 superalloy, which has guiding significance for alloy optimization design.

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董衛(wèi)平,汪彬,宮寧寧,陳錚.相場(chǎng)法研究Ni-Al間作用勢(shì)對(duì)Ni75Al14Cr11合金L10預(yù)析出相的影響[J].稀有金屬材料與工程,2020,49(1):169~176.[dongweiping, Wang Bin, Gong Ningning, Chen Zheng. Phase-field simulation for influence of Ni-Al interatomic potential on L10 pre-precipitation phase of Ni75Al14Cr11 alloy[J]. Rare Metal Materials and Engineering,2020,49(1):169~176.]
DOI:10.12442/j. issn.1002-185X.20181177

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  • 收稿日期:2018-11-23
  • 最后修改日期:2018-12-24
  • 錄用日期:2019-01-10
  • 在線發(fā)布日期: 2020-02-16
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