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采用X射线衍射仪(XRD)、扫描电镜(SEM)、显微硬度仪及万能试验机等研究了在950℃再结晶退火不同时间对Fe2CoNiV1.3高熵合金微观组织及力学性能的影响。结果表明：退火后合金基体仍保持面心立方(FCC)晶体结构，但晶界处析出了少量σ相；随着退火时间的延长，合金的晶粒尺寸逐渐增大，孪晶数量增加，完全再结晶的晶粒比例显著提高；虽然再结晶退火后合金的硬度均低于轧制态合金，但退火后合金的综合力学性能较为优秀，尤其是在950℃退火60 min后，其极限抗拉强度与伸长率发分别为857 MPa和54%,再结晶退火有效改善了合金的强度和塑性平衡。
Abstract：Effect of recrystallization annealing at 950 ℃ for different time on microstructure and mechanical properties of Fe2CoNiV1.3 high-entropy alloy was studied using X-ray diffraction(XRD), scanning electron microscopy(SEM), microhardness tester, and universal testing machine. The results show that the alloy matrix still maintains a face centered cubic(FCC) crystal structure after annealing, but a small amount of σ phase precipitates at the grain boundaries. With the increase of annealing time, the grain size of the alloy gradually increases, the number of twins increases, and the proportion of completely recrystallized grains significantly increases. Although the hardness of the alloy after recrystallization annealing is lower than that of the rolled alloy, the comprehensive mechanical properties of the annealed alloy are relatively excellent. Especially after annealing at 950 ℃ for 60 min, its ultimate tensile strength and elongation are 857 MPa and 54%, respectively. Recrystallization annealing effectively improves the strength and plasticity balance of the alloy.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2025-zt08
中图分类号:TG139;TG156.2
引用信息:
[1]李阔,刘亮,刘柏宇等.再结晶退火对Fe_2CoNiV_(1.3)高熵合金微观组织及力学性能的影响[J].材料热处理学报,2025,46(07):73-80.DOI:10.13289/j.issn.1009-6264.2025-zt08.
基金信息:
辽宁省兴辽英才项目(XLYC2203060)