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A micro- and nano-indentation test was performed for CoCrFeNiMn high entropy alloy. The relationship between the geometrically necessary dislocation (GND) density of CoCrFeNiMn and reciprocal value of real indentation depth (1/h) was obtained under different working conditions, and the influence of elastic factor (Δe) on GND density was also explored. The results show that GND density with the consideration of elastic deformation (ρGe) presents a nonlinear relationship with 1/h, while GND density without the consideration of influence of elastic deformation (ρG) has a linear relation with 1/h. Based on the comparison of variation of ρG/ρGe with the indentation depth, it is found that the ratio of ρG/ρGe is 3-4 when the indentation depth is less than 500 nm, indicating that elastic factor can have an obvious impact on the GND density at shallow indentation. And, the ratio of ρG/ρGe is approaching 1 when the indentation depth is up to 3 000 nm. It is shown that as indentation depth increases, dislocation slip gradually dominates deformation.

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通过微纳米压入法对CoCrFeNiMn高熵合金进行压入测试,得到不同工况下几何必须位错密度与实时压入深度倒数1/h的关系,并探究了弹性因子(Δe)对几何必须位错密度的影响。结果表明,考虑弹性变形影响的几何必须位错密度(ρGe)与1/h呈现出非线性关系;忽略弹性变形影响的几何必须位错密度(ρG)与1/h呈现出线性关系;对比ρG/ρGe随压入深度的变化,发现存在尺度效应:压入深度小于500 nm时,ρG/ρGe比值为3~4,说明弹性因子在浅压痕处对几何必须位错密度影响明显;压入深度达3 000 nm时,ρG/ρGe比值接近1;随着压入深度增加,位错滑移逐渐占据主导地位。

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周建军(1974—),女,河北唐山人,副教授,主要从事机械制造工艺与设备研究。

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周建军(1974—),女,河北唐山人,副教授,主要从事机械制造工艺与设备研究。

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周建军(1974—),女,河北唐山人,副教授,主要从事机械制造工艺与设备研究。

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微纳米压入测试过程中高熵合金弹性变形对几何必须位错密度的影响
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周建军 1 , 陈杰 2 , 王艺 3
矿冶工程杂志 | 材料 2023,43(4): 139-143
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矿冶工程杂志 | 材料 2023, 43(4): 139-143
微纳米压入测试过程中高熵合金弹性变形对几何必须位错密度的影响
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周建军1, 陈杰2, 王艺3
作者信息
  • 1.唐山市古冶区职业技术教育中心学校,河北 唐山 063100
  • 2.安阳职业技术学院,河南 安阳 455000
  • 3.中国民用航空飞行学院,四川 广汉 618300
  • 周建军(1974—),女,河北唐山人,副教授,主要从事机械制造工艺与设备研究。

Effect of Elastic Deformation of High-Entropy Alloy on Geometrically Necessary Dislocation Density in Micro- and Nano-indentation Test
Jianjun ZHOU1, Jie CHEN2, Yi WANG3
Affiliations
  • 1.Tangshan Guye District Vocational and Technical Education Center School, Tangshan 063100, Hebei, China
  • 2.Anyang Vocational and Technical College, Anyang 455000, Henan, China
  • 3.Civil Aviation Flight University of China, Guanghan 618300, Sichuan, China
出版时间: 2023-08-01 doi: 10.3969/j.issn.0253-6099.2023.04.030
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通过微纳米压入法对CoCrFeNiMn高熵合金进行压入测试,得到不同工况下几何必须位错密度与实时压入深度倒数1/h的关系,并探究了弹性因子(Δe)对几何必须位错密度的影响。结果表明,考虑弹性变形影响的几何必须位错密度(ρGe)与1/h呈现出非线性关系;忽略弹性变形影响的几何必须位错密度(ρG)与1/h呈现出线性关系;对比ρG/ρGe随压入深度的变化,发现存在尺度效应:压入深度小于500 nm时,ρG/ρGe比值为3~4,说明弹性因子在浅压痕处对几何必须位错密度影响明显;压入深度达3 000 nm时,ρG/ρGe比值接近1;随着压入深度增加,位错滑移逐渐占据主导地位。

高熵合金  /  微纳米压入  /  几何必须位错  /  弹性因子  /  弹性变形  /  位错密度

A micro- and nano-indentation test was performed for CoCrFeNiMn high entropy alloy. The relationship between the geometrically necessary dislocation (GND) density of CoCrFeNiMn and reciprocal value of real indentation depth (1/h) was obtained under different working conditions, and the influence of elastic factor (Δe) on GND density was also explored. The results show that GND density with the consideration of elastic deformation (ρGe) presents a nonlinear relationship with 1/h, while GND density without the consideration of influence of elastic deformation (ρG) has a linear relation with 1/h. Based on the comparison of variation of ρG/ρGe with the indentation depth, it is found that the ratio of ρG/ρGe is 3-4 when the indentation depth is less than 500 nm, indicating that elastic factor can have an obvious impact on the GND density at shallow indentation. And, the ratio of ρG/ρGe is approaching 1 when the indentation depth is up to 3 000 nm. It is shown that as indentation depth increases, dislocation slip gradually dominates deformation.

high entropy alloy  /  micro- and nano-indentation  /  geometrically necessary dislocation (GND)  /  elastic factor  /  elastic deformation  /  dislocation density
周建军, 陈杰, 王艺. 微纳米压入测试过程中高熵合金弹性变形对几何必须位错密度的影响. 矿冶工程杂志, 2023 , 43 (4) : 139 -143 . DOI: 10.3969/j.issn.0253-6099.2023.04.030
Jianjun ZHOU, Jie CHEN, Yi WANG. Effect of Elastic Deformation of High-Entropy Alloy on Geometrically Necessary Dislocation Density in Micro- and Nano-indentation Test[J]. Mining and Metallurgical Engineering, 2023 , 43 (4) : 139 -143 . DOI: 10.3969/j.issn.0253-6099.2023.04.030
  • 国家自然科学基金青年基金(12104502)
2023年第43卷第4期
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doi: 10.3969/j.issn.0253-6099.2023.04.030
  • 接收时间:2023-02-27
  • 首发时间:2026-03-05
  • 出版时间:2023-08-01
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  • 收稿日期:2023-02-27
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国家自然科学基金青年基金(12104502)
作者信息
    1.唐山市古冶区职业技术教育中心学校,河北 唐山 063100
    2.安阳职业技术学院,河南 安阳 455000
    3.中国民用航空飞行学院,四川 广汉 618300
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
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Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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