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利用选区激光熔化(SLM)技术制备了AlCoCrFeNi2.1高熵合金，研究了激光功率和扫描速度对其组织及摩擦磨损性能的影响。利用X射线衍射(XRD)、扫描电镜(SEM)、能谱仪(EDS)、显微维氏硬度计和摩擦磨损试验机等研究了合金的物相、微观组织、硬度及摩擦磨损性能。结果表明：AlCoCrFeNi2.1高熵合金由BCC相与FCC相双相固溶体构成；合金的显微硬度及耐磨损性能在激光功率为350 W、扫描速度为500 mm/s时达到最佳，显微硬度值达510.7 HV0.1,平均摩擦系数、磨损量和磨损率分别为0.4015、0.0048 g和0.3604×10-5 g·N-1·m-1。
Abstract：The AlCoCrFeNi2.1 high-entropy alloy was prepared using selective laser melting(SLM) technology, and the effects of laser power and scanning speed on its microstructure and tribological properties were investigated. The phase, microstructure, hardness, and friction-wear properties of the alloy were studied by means of X-ray diffraction(XRD), scanning electron microscopy(SEM), energy dispersive spectrometer(EDS) analysis, micro-Vickers hardness tester, and friction and wear tester. The results show that the AlCoCrFeNi2.1 high-entropy alloy consists of a dual-phase BCC and FCC solution. The microhardness and wear resistance of the alloy reach the best when the laser power is 350 W and the scanning speed is 500 mm/s, yielding a peak microhardness of 510.7 HV0.1 with concurrent tribological metrics of friction coefficient(0.4015), wear loss(0.0048 g), and wear rate(0.3604×10-5 g·N-1·m-1).
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基本信息:
DOI：10.13289/j.issn.1009-6264.2025-0139
中图分类号:TG139;TG665
引用信息:
[1]李凡可,徐峰,景然,等.SLM技术制备AlCoCrFeNi_(2.1)高熵合金的组织及摩擦磨损性能[J].材料热处理学报,2025,46(10):70-79.DOI:10.13289/j.issn.1009-6264.2025-0139.
基金信息:
陕西省教育厅产业化(24JC022); 陕西省教育厅青年创新团队(24JP036)