Ti-6Al-4V alloy has been widely used in industrial fields. Electrical discharge machining (EDM) is a commonly used technology for machining Ti-6Al-4V alloy. During EDM of Ti-6Al-4V alloy, the thermal and physical characteristics of tool electrode have an important influence on processing characteristics. In order to study the influence of different electrode materials on the processing characteristics of Ti-6Al-4V alloy, brass electrode, copper tungsten electrode, and tungsten electrode were used to perform EDM of Ti-6Al-4V alloy. In this paper, electrodes with V-groove array structures were designed to carry out powder mixed electrical discharge machining (PMEDM) of Ti-6Al-4V alloy, and the machining results were evaluated based on four indicators: microstructures morphology, tool electrode wear (TEW), material removal rate (MRR), and recast layer thickness (RLT). The processing results show that copper tungsten electrode is recommended to machine Ti-6Al-4V alloy because it has the highest reproduction rate (75.2%), a smaller TEW (139 μm), the highest MRR (255.39 mm³/min), and a thinner RLT (3.35 μm).

Ti-6Al-4V合金已广泛应用于工业领域。电火花加工 (EDM) 是加工 Ti-6Al-4V 合金的常用技术。在 Ti-6Al-4V 合金电火花加工过程中，工具电极的热物理特性对加工特性有重要影响。为了研究不同电极材料对Ti-6Al-4V合金加工特性的影响，采用黄铜电极、铜钨电极和钨电极对Ti-6Al-4V合金进行电火花加工。本文设计了V型槽阵列结构电极对Ti-6Al-4V合金进行粉末混合放电加工(PMEDM),并根据显微组织形貌、刀具电极磨损( TEW), 材料去除率 (MRR), 和重铸层厚度 (RLT)。加工结果表明，铜钨电极被推荐用于加工Ti-6Al-4V合金，因为它具有最高的再生率（75.2%）、较小的TEW（139 μm）、最高的MRR（255.39 mm）³ /min)，和更薄的 RLT (3.35 μm)。