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雙磨粒微切削單晶γ-TiAl合金的材料去除機制研究
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長春理工大學

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國家自然科學基金項目（面上項目，重點項目，重大項目）、吉林省科技發(fā)展項目、吉林省教育廳項目、長春市科技發(fā)展項目


Study on material removal mechanism of single crystal γ- TiAl Alloy by double abrasive micro cutting
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Changchun University of Science and Technology

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national?natural?science?foundation of?china?、Jilin?province?science?and?technology?development?program?of Jilin?province?、Project?of?education?department?of?jilin?province、Changchun?science?and?technology?program?of?changchun?city

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    摘要:

    為了分析磨削過程中單晶γ-TiAl合金的材料去除機制，建立了雙磨粒磨削Ti-Al合金的分子動力學模型。揭示了金剛石磨粒的橫向間距和縱向間距對單晶γ-TiAl合金材料去除機制的影響。研究結(jié)果表明：單晶γ-TiAl合金的微切削過程中伴隨有溫度、勢能、位錯的變化以及晶格結(jié)構(gòu)的轉(zhuǎn)變；切削力、切削溫度、勢能以及去除效率隨著橫向間距的增加而增大，但受縱向間距的影響較??；晶格轉(zhuǎn)變的原子數(shù)隨橫向間距的增加而增大，隨縱向間距的增加而減小；隨著橫向間距和縱向間距的增加，位錯數(shù)量、位錯總長度以及位錯密度會相應增大。

    Abstract:

    In order to analyze the material removal mechanism of single crystal γ-TiAl alloy in grinding, the molecular dynamics model of Ti-Al alloy ground by two abrasive grains was established. The influence of lateral and longitudinal spacing of the diamond abrasive on the material removal mechanism of the single crystal γ-TiAl alloy was revealed. The results showed that the microcutting process of single crystal γ-TiAl alloy is accompanied by the change of temperature, potential energy and dislocation, as well as lattice phase transition. Cutting force, cutting temperature, potential energy and removal efficiency increase with the increase of lateral spacing, but are less affected by longitudinal spacing. The number of lattice phase transition atoms increases with the increase of lateral spacing and decreases with the increase of longitudinal spacing. With the increase of laterial and longitudinal spacing, the number of dislocations, total length of dislocations, and density of dislocations will increase accordingly.

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李俊燁,解鴻偲,張心明,趙偉宏,石廣豐,徐成宇.雙磨粒微切削單晶γ-TiAl合金的材料去除機制研究[J].稀有金屬材料與工程,2021,50(2):396~407.[Li Junye, Xie Hongcai, Zhang Xinming, Zhao Weihong, Shi Guangfeng, Xu Chengyu. Study on material removal mechanism of single crystal γ- TiAl Alloy by double abrasive micro cutting[J]. Rare Metal Materials and Engineering,2021,50(2):396~407.]
DOI：10.12442/j. issn.1002-185X. E20200003

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  • 收稿日期:2020-02-10
  • 最后修改日期:2020-06-29
  • 錄用日期:2020-07-03
  • 在線發(fā)布日期: 2021-03-09
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