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Effect of Strain Rates on Adiabatic Shear Sensitivity of Al0.4CoCrFeNi High-Entropy Alloy
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Xiaogang LIU, Lihong JIANG, Zheng LIU, Liang YANG, Zhenghua GUO
Mining and Metallurgical Engineering | 2023, 43(1) : 133 - 136
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Mining and Metallurgical Engineering | 2023, 43(1): 133-136
• MATERIALS •
Effect of Strain Rates on Adiabatic Shear Sensitivity of Al0.4CoCrFeNi High-Entropy Alloy
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Xiaogang LIU, Lihong JIANG, Zheng LIU, Liang YANG, Zhenghua GUO
Affiliations
  • School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China
Published: 2023-02-01 doi: 10.3969/j.issn.0253-6099.2023.01.029
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The cap specimens of Al0.4 CoCrFeNi high-entropy alloy were dynamically loaded with a split Hopkinson pressure bar at room temperature, for studying the adiabatic shear sensitivity of Al0.4CoCrFeNi high-entropy alloy at different strain rates. The results show that the grain size of Al0.4CoCrFeNi high entropy alloy before and after dynamic loading is about 100 μm and 100 nm, respectively, with about three orders of magnitude difference. The Al0.4CoCrFeNi high entropy alloy, with a finer grain size after dynamic loading, has lower adiabatic shear sensitivity, which will increase with the increase of strain rate. Within the range in the experiment, the adiabatic shear sensitivity reaches the highest when the strain rate is 3 360 s-1, forming an adiabatic shear band that is about 2 μm wide and has an angle of 45° with the dynamic loading direction. At this moment, both the critical strain value and the formation energy per unit volume of adiabatic shear are the smallest. The Al0.4CoCrFeNi high-entropy alloy undergoes significant grain refinement during high strain rate deformation. And the adiabatic shear of Al0.4CoCrFeNi high-entropy alloy under dynamic loading is attributed to the thermal-viscoplastic constitutive instability of the material.

adiabatic shear sensitivity  /  strain rate  /  high-entropy alloy  /  adiabatic shear band (ASB)
Xiaogang LIU, Lihong JIANG, Zheng LIU, Liang YANG, Zhenghua GUO. Effect of Strain Rates on Adiabatic Shear Sensitivity of Al0.4CoCrFeNi High-Entropy Alloy[J]. Mining and Metallurgical Engineering, 2023 , 43 (1) : 133 -136 . DOI: 10.3969/j.issn.0253-6099.2023.01.029
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doi: 10.3969/j.issn.0253-6099.2023.01.029
  • Receive Date：2022-08-26
  • Online Date：2026-03-05
  • Published：2023-02-01
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  • Received：2022-08-26
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    School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
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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