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雙孔洞排布位置對(duì)C軸壓縮鎂單晶的影響研究
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太原科技大學(xué) 重型機(jī)械教育部工程研究中心

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國(guó)家重點(diǎn)研發(fā)計(jì)劃（2018YFB1307902）；國(guó)家自然科學(xué)基金（U1710113）；山西省研究生聯(lián)合培養(yǎng)基地人才培養(yǎng)項(xiàng)目（2018JD33）；山西省青年拔尖人才；山西省優(yōu)秀青年基金（201901D211312）；山西省高等學(xué)校創(chuàng)新人才優(yōu)秀青年學(xué)術(shù)帶頭人；山西省高等學(xué)?？萍汲晒D(zhuǎn)化培育項(xiàng)目（2019KJ028）；山西省新興產(chǎn)業(yè)領(lǐng)軍人才；山西省研究生教育創(chuàng)新計(jì)劃 (2019SY482)）


The influence of the arrangement of double voids on the c-axis compressed magnesium single crystal
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Heavy Machinery Eng Research Center,Taiyuan University of Science and Technology Taiyuan

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    摘要:

    為探究雙孔洞位置排布對(duì)于鎂及鎂合金塑性變形的影響,應(yīng)用分子動(dòng)力學(xué)方法模擬在300k下含不同排布位置的雙孔洞鎂單晶c軸壓縮模型,結(jié)合三種模型的應(yīng)力-應(yīng)變曲線、勢(shì)能曲線、徑向分布函數(shù)和位錯(cuò)密度曲線,分析不同排布位置雙孔洞鎂單晶的壓縮力學(xué)性能和結(jié)構(gòu)演化過(guò)程。結(jié)果表明：雙孔洞鎂單晶在與加載方向平行時(shí)可承受的壓應(yīng)力峰值和勢(shì)能峰值以及對(duì)應(yīng)的應(yīng)變程度最大；與加載方向垂直時(shí)次之,當(dāng)與加載方向呈45°排布時(shí)最小,且與c軸呈90°排布的雙孔洞鎂單晶模型孔洞閉合速率最快。

    Abstract:

    In this paper, the molecular dynamics method is used to simulate the c-axis compression model of two voids single crystal magnesium with different arrangement positions at 300K. Combined with the stress-strain curve, potential energy curve, radial distribution function and dislocation density curve of the three models, the compression mechanical properties and structural evolution process are analyzed. The results show that the maximum compressive stress, peak potential energy and corresponding strain can be tolerated when the single crystal is parallel to the loading direction, the second is perpendicular to the loading direction, and the smallest is 45 ° arrangement with the loading direction.The results show that the double void model with 90 ° arrangement with c axis has the fastest viods closure rate.

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王環(huán)珠,薛春,楊千華,桂海蓮,李玉貴,楚志兵.雙孔洞排布位置對(duì)C軸壓縮鎂單晶的影響研究[J].稀有金屬材料與工程,2021,50(4):1391~1397.[Wang Huanzhu, Xue Chun, Yang Qianhua, Gui Hailian, Li Yugui, Chu Zhibing. The influence of the arrangement of double voids on the c-axis compressed magnesium single crystal[J]. Rare Metal Materials and Engineering,2021,50(4):1391~1397.]
DOI：10.12442/j. issn.1002-185X.20200371

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  • 收稿日期:2020-05-30
  • 最后修改日期:2020-07-06
  • 錄用日期:2020-07-21
  • 在線發(fā)布日期: 2021-05-08
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