Material Removal Rate Enhancement Induced by Electrochemical Discharge Machining for Refractory High-Entropy Alloys Compared with EDM.

IF 2 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Entropy Pub Date : 2025-08-29 DOI:10.3390/e27090912

Bolin Dong, Zirui Yao, Chen Qi, Xiaokang Yue, Zufang Zhang, Shunhua Chen

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引用次数: 0

Abstract

Refractory high-entropy alloys (RHEAs) are categorized as difficult-to-machine materials due to their excellent mechanical properties. Electrical discharge machining (EDM) is a special processing method for RHEAs, which faces challenges such as low machining efficiency. In this work, electrochemical discharge machining (ECDM) was proposed for (TiVZrTaW)_99.5N_0.5 and (TiVZrTa)W₅ (at. %, denoted as W20N0.5 and W5, respectively) RHEAs, and their machining performances were investigated and compared with EDM. At a peak current of 25 A, the material removal rate (MRR) using ECDM is more than twice that of EDM for W20N0.5 (reaching to 1.24 mm³/min) and 1.5 times higher than that for W5. Both W20N0.5 and W5 RHEAs exhibited higher MRR in ECDM based on the analyses of the influence of top diameter, bottom diameter, machining depth, and surface roughness (Ra). The process and mechanisms of material removal were examined through the microstructural morphology and elemental distribution analyses. This work proposed a more effective route for machining RHEAs by ECDM compared to the conventional EDM.

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电化学放电加工对难熔高熵合金材料去除率的提高与电火花加工的比较

难熔高熵合金（RHEAs）因其优异的机械性能而被归类为难加工材料。电火花加工（EDM）是一种特殊的加工方法，它面临着加工效率低的挑战。在这项工作中，提出了（TiVZrTaW）99.5N0.5和（TiVZrTa）W5 （at）的电化学放电加工（ECDM）。%，分别为W20N0.5和W5)，研究了它们的加工性能，并与电火花加工进行了比较。在峰值电流为25 a时，ECDM对W20N0.5的材料去除率（MRR）是EDM的2倍以上（达到1.24 mm3/min），是W5的1.5倍。基于顶径、底径、加工深度和表面粗糙度（Ra）的影响分析，W20N0.5和W5 RHEAs在ECDM中的MRR均较高。通过显微组织形貌和元素分布分析，研究了材料去除的过程和机理。与传统电火花加工相比，本文提出了一种更有效的切削加工途径。

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来源期刊

Entropy PHYSICS, MULTIDISCIPLINARY-

CiteScore

4.90

自引率

11.10%

发文量

1580

审稿时长

21.05 days

期刊介绍： Entropy (ISSN 1099-4300), an international and interdisciplinary journal of entropy and information studies, publishes reviews, regular research papers and short notes. Our aim is to encourage scientists to publish as much as possible their theoretical and experimental details. There is no restriction on the length of the papers. If there are computation and the experiment, the details must be provided so that the results can be reproduced.