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采用真空电弧炉熔炼并制备等原子比的HfNbZrTiTa高熵合金。通过XRD、SEM、EDS、电子万能试验机和霍普金森压杆对合金的显微组织、室温准静态压缩性能及室温(298 K)、低温(77 K)下的动态压缩性能进行研究。结果表明：该合金显微组织主要为BCC固溶体结构，晶间存在少量共晶组织；具有良好的塑性，室温下压缩塑性超50%且未发生断裂；HfNbZrTiTa合金在动态压缩试验条件下(应变速率为2 000～4 000 s-1),材料应变敏感性较低；当温度从298 K降到77 K,流变应力变化不明显。
Abstract：HfNbZrTiTa high entropy alloy with equal atomic ratio was prepared by vacuum arc furnace melting.The microstructure, quasi-static compression properties at room temperature and dynamic compression properties at room temperature(298 K)and low temperature(77 K)were studied by XRD,SEM,EDS,electronic universal testing machine and Hopkinson pressure bar tester.The results show that the microstructure of the alloy is mainly BCC solid solution structure, there is a small amount of eutectic structure between the grains, and it has good plasticity.The compression plasticity at room temperature exceeds 50% without fracture.In the dynamic compression test, the strain rate is controlled in the range of 2 000 to 4 000 s-1.When the temperature drops from 298 K to 77 K,the flow stress change is not obvious.
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基本信息:
中图分类号:TG139
引用信息:
[1]魏韬,张伟强,张丽,等.HfNbZrTiTa高熵合金的组织与压缩性能[J].沈阳理工大学学报,2025,44(02):73-78+85.
基金信息:
辽宁省教育厅高等学校基本科研项目(LJKMZ20220592)
2025-02-26
2025-02-26