A comprehensive review on non-conventional machining of Nickel-Titanium alloys: Techniques and surface integrity

IF 7.9 Q1 ENGINEERING, MULTIDISCIPLINARY

Results in Engineering Pub Date : 2025-07-10 DOI:10.1016/j.rineng.2025.106231

Nitish Kumar , Gaurav Nandan , Subhash Chand , Ashwini Kumar , Jayant Giri , Eman Ramadan Elsharkawy

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Abstract

Nickel-Titanium (NiTi) shape memory alloys (SMAs) are widely used in biomedical implants, aerospace structures, and precision robotics due to their unique properties such as pseudo-elasticity, shape memory effect (SME), and corrosion resistance. However, their poor machinability limits the use of conventional techniques. This review critically evaluates major non-conventional machining (NCM) processes, including WEDM, EDM, ECM, laser-based, and hybrid techniques, with a focus on their influence on surface integrity, material removal rate (MRR), and electrode-tool interaction. The analysis reveals that while WEDM and EDM are popular, they often compromise SME due to thermal effects, whereas ECM and ECAM offer superior surface finish with minimal thermal damage. Notably, molybdenum electrodes reduce surface contamination, enhancing suitability for biomedical applications. The study provides actionable insights for selecting and optimizing NCM processes tailored for high-performance NiTi SMA components in medical, aerospace, and micro-mechanical systems.

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镍钛合金的非常规加工技术与表面完整性综述

镍钛（NiTi）形状记忆合金（sma）由于其独特的性能，如伪弹性、形状记忆效应（SME）和耐腐蚀性，被广泛应用于生物医学植入物、航空航天结构和精密机器人。然而，它们较差的可加工性限制了传统技术的使用。这篇综述批判性地评估了主要的非常规加工（NCM）工艺，包括线切割、电火花加工、电解加工、激光加工和混合技术，重点关注了它们对表面完整性、材料去除率（MRR）和电极-工具相互作用的影响。分析表明，虽然电火花加工和电火花加工很受欢迎，但由于热效应，它们往往会影响SME，而ECM和ECAM可以在最小热损伤的情况下提供卓越的表面光洁度。值得注意的是，钼电极减少了表面污染，增强了生物医学应用的适用性。该研究为医疗、航空航天和微机械系统中高性能NiTi SMA组件的NCM工艺选择和优化提供了可行的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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