Excellent strength-ductility synergy in as-cast Al0.6CoCrFeNi2Mo0.08V0.04 high-entropy alloy at room and cryogenic temperatures

Excellent strength-ductility synergy in as-cast Al0.6CoCrFeNi2Mo0.08V0.04 high-entropy alloy at room and cryogenic temperatures
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铸态 Al0.6CoCrFeNi2Mo0.08V0.04 高熵合金在室温和低温下具有出色的强度-延展性协同作用

DOI:
10.1016/j.matlet.2021.129778
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发表时间:
2021-03
期刊:
影响因子:
3
通讯作者:
Zhang Zhengrong
Zhang Zhengrong
中科院分区:
材料科学3区
文献类型:
--
作者:
Dong Yong;Duan Shougang;Huang Xuan;Li Chuanqiang;Zhang Zhengrong

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采用真空感应熔炼法制备了Al 0. 6CoCrFeNi 2 Mo 0. 08 V0. 04高熵合金。该合金具有枝晶和枝晶间组织,在室温和低温下表现出优异的强度-塑性协同效应。室温屈服强度达400 MPa,延伸率超过39%.随着温度的降低,屈服强度、断裂强度和延伸率都有所提高。最大屈服强度在-196 °C时达到560 MPa,延伸率超过42%。断裂机制主要为韧窝型韧性断裂。
The Al0.6CoCrFeNi2Mo0.08V0.04high-entropy alloy was prepared by vacuum induction melting. The alloy presented dendrite and inter-dendrite microstructure and showed excellent strength-ductility synergy at room and cryogenic temperatures. At room temperature, the yield strength reached 400 MPa while the elongation exceeded to 39%. With the decrease of temperatures, the yield strength, fracture strength, and the elongation were all improved. The maximum yield strength reached 560 MPa at −196 °C and the elongation exceeded 42%. The fracture mechanism was mainly a dimple-type ductile fracture.
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