0.5CoCrFeNi合金拉伸和抗輻照性能的影響。通過位錯分析及點缺陷分析闡明了相關(guān)影響機(jī)理。結(jié)果表明,錯配度越高的晶界其晶界處的元素偏聚越明顯?；瘜W(xué)短程有序能夠提升雙晶的拉伸性能及抗輻照能力,特別是對于含錯配度較大晶界的雙晶,晶界能夠有效吸收輻照產(chǎn)生間隙原子。"/>

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化學(xué)短程有序在晶界處的作用及其對Al0.5CoCrFeNi合金拉伸和抗輻照性能影響的分子模擬
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西南交通大學(xué)材料先進(jìn)技術(shù)教育部重點實驗室

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四川省重大科技專項(項目號2021ZDZX0001)


Molecular Simulation of Chemical Short-range Ordering at Grain Boundaries and Its Effect on Tensile and Radiation Resistance of Al0.5CoCrFeNi Alloy
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Key Laboratory of Advanced Technologies of Materials Ministry of Education,Southwest Jiaotong University

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    摘要:

    多主元合金中的化學(xué)短程有序結(jié)構(gòu)已被視作有效的合金強化手段,而化學(xué)短程有序也會對晶界處元素分布產(chǎn)生影響。為研究其對合金性能的影響,本文采用分子動力學(xué)方法研究了幾種典型晶界處的化學(xué)短程有序?qū)l0.5CoCrFeNi合金拉伸和抗輻照性能的影響。通過位錯分析及點缺陷分析闡明了相關(guān)影響機(jī)理。結(jié)果表明,錯配度越高的晶界其晶界處的元素偏聚越明顯。化學(xué)短程有序能夠提升雙晶的拉伸性能及抗輻照能力,特別是對于含錯配度較大晶界的雙晶,晶界能夠有效吸收輻照產(chǎn)生間隙原子。

    Abstract:

    The chemical short-range ordered structure in multi-principal element alloys has been regarded as an effective strengthening method. It also can affect the distribution of elements at grain boundaries. In order to study the effect on the properties of Al0.5CoCrFeNi alloy, the effects of chemical short-range order at several typical grain boundaries on the tensile and radiation resistance of Al0.5CocrfenI alloy were studied by molecular dynamics method. The relevant influence mechanism is explained by dislocation analysis and point defect analysis. The results show that the segregation of elements at grain boundaries is more obvious with higher mismatch degree. Chemical short-range ordering can improve the tensile properties and radiation resistance of bicrystals, especially for bicrystals with large mismatched grain boundaries, which can effectively absorb radiation and produce interstitial atoms.

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柴小松,袁力軍,李光磊,李婧,李達(dá).化學(xué)短程有序在晶界處的作用及其對Al0.5CoCrFeNi合金拉伸和抗輻照性能影響的分子模擬[J].稀有金屬材料與工程,2024,53(8):2267~2274.[Chai Xiaosong, Yuan Lijun, Li Jing, Li Guanglei, Li Da. Molecular Simulation of Chemical Short-range Ordering at Grain Boundaries and Its Effect on Tensile and Radiation Resistance of Al0.5CoCrFeNi Alloy[J]. Rare Metal Materials and Engineering,2024,53(8):2267~2274.]
DOI：10.12442/j. issn.1002-185X.20230412

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  • 收稿日期:2023-06-30
  • 最后修改日期:2023-09-25
  • 錄用日期:2023-10-07
  • 在線發(fā)布日期: 2024-08-20
  • 出版日期: 2024-08-08