| 王海涛,何美凤.Ga对NiCoVCu合金的组织与性能的影响[J].有色金属材料与工程,2024,45(5):85-91. |
| Ga对NiCoVCu合金的组织与性能的影响 |
| Effect of Ga on the microstructure and properties of NiCoVCu alloy |
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| DOI：10.13258/j.cnki.nmme.20230313001 |
| 中文关键词: 高熵合金 析出强化 金属间化合物 微观组织 性能 |
| 英文关键词:high-entropy alloy precipitation strengthening intermetallic compound microstructure property |
| 基金项目:国家自然科学基金资助项目(52371070） |
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| 中文摘要: |
| 以高强度、高韧性的NiCoV中熵合金为基体制备了(NiCoV)99-xCuGax(x=0，1，2，3)合金，对得到的合金进行冷轧和退火处理，研究Ga含量对未退火和退火温度为900、950、1 000 ℃时的合金的微观组织、力学性能、耐腐蚀性能的影响。研究结果表明：适量的Ga可以促进析出相形成，产生析出强化；随着Ga含量的增加，会出现金属间化合物，导致合金的力学性能下降；随着退火温度的升高，合金的伸长率上升；过量的Ga，在退火温度过高时，合金的伸长率下降；(NiCoV)96CuGa3合金在退火温度为950 ℃时的综合力学性能较好，抗拉强度为（992±10）MPa，伸长率为48.70%。 |
| 英文摘要: |
| NiCoV medium entropy alloy is an alloy with high strength and high toughness，in this paper, NiCoV is used as the matrix, the (NiCoV)99-xCuGax (x=0, 1, 2, 3) series alloys were prepared, cold rolling and annealing of the obtained samples, the effect of different content of Ga elements on the organization, mechanical properties and corrosion resistance of this alloy at annealing temperatures of 0, 900, 950, 1 000 °C was investigated. The study results show that: the addition of suitable amount of Ga elements can promote the formation of precipitation phase, produces precipitation strengthening. However, with the increasing content of Ga elements, intermetallic compounds will appear, the result is a degradation of the alloy's properties. As well, as the annealing temperature increases, the elongation of the alloy increases due to the elimination of residual stresses within the alloy. The best overall mechanical properties of (NiCoV)96CuGa3 alloy were obtained experimentally at an annealing temperature of 950 ℃, when the tensile strength of the alloy was (992±10) MPa and the elongation was 48.70%. |
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