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Tensile strength prediction of dual-phase Al 0.6 CoCrFeNi high-entropy alloys
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-08-27 , DOI: 10.1007/s12613-020-2084-2
Min Zhang , Jin-xiong Hou , Hui-jun Yang , Ya-qin Tan , Xue-jiao Wang , Xiao-hui Shi , Rui-peng Guo , Jun-wei Qiao

The evolution of the microstructure and tensile properties of dual-phase Al0.6CoCrFeNi high-entropy alloys (HEAs) subjected to cold rolling was investigated. The homogenized Al0.6CoCrFeNi alloys consisted of face-centered-cubic and body-centered-cubic phases, presenting similar mechanical behavior as the as-cast state. The yield and tensile strengths of the alloys could be dramatically enhanced to ∼1205 MPa and ∼1318 MPa after 50% rolling reduction, respectively. A power-law relationship was discovered between the strain-hardening exponent and rolling reduction. The tensile strengths of this dual-phase HEA with different cold rolling treatments were predicted, mainly based on the Hollomon relationship, by the strain-hardening exponent, and showed good agreement with the experimental results.



中文翻译:

Al 0.6 CoCrFeNi双相高熵合金的拉伸强度预测

研究了冷轧双相Al 0.6 CoCrFeNi高熵合金(HEA)的组织和拉伸性能的演变。均质Al 0.6CoCrFeNi合金由面心立方和体心立方相组成,表现出与铸态相似的机械行为。轧制率降低50%后,合金的屈服强度和抗拉强度可以分别显着提高到〜1205 MPa和〜1318 MPa。在应变硬化指数和轧制压下率之间发现了幂律关系。通过应变硬化指数,主要基于Hollomon关系,预测了采用不同冷轧处理的这种双相HEA的拉伸强度,并与实验结果吻合良好。

更新日期:2020-08-28
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