The corrosion resistance of a heat-treated Ti–6Al–4 V alloy fabricated using the additive manufacturing (AM) method was investigated through a series of electrochemical techniques, including potentiodynamic polarization, electrochemical impedance spectroscopy, and critical pitting temperature measurements, in an effort to improve the corrosion resistance of AM Ti–6Al–4 V subject to different stages of heat treatment. During this process, we reported that the corrosion resistance of the AM Ti–6Al–4 V alloy significantly reduced, which we attributed to both preexisting α ′ phases and newly emerging precipitates. After heat treatment at 650 °C and 750 °C, the corrosion resistance of AM Ti–6Al–4 V worsened further after cooling compared to the original as-received sample because of the existence of the α ′ phase (without decomposition) and precipitates. However, at 850 °C and 1000 °C, the heat-treated samples demonstrated much better corrosion resistance compared to the ...

中文翻译：

---

热处理参数对增材制造的Ti-6Al-4V合金耐蚀性的影响

通过一系列电化学技术，包括电势极化，电化学阻抗谱和临界点蚀温度测量，研究了采用增材制造（AM）方法制造的热处理Ti-6Al-4 V合金的耐腐蚀性。以提高经受不同热处理阶段的AM Ti–6Al–4 V的耐腐蚀性。在此过程中，我们报告了AM Ti–6Al–4 V合金的耐蚀性显着降低，这归因于既存的α′相和新出现的析出物。在650°C和750°C热处理后，与原始样品相比，冷却后AM Ti–6Al–4 V的耐腐蚀性进一步恶化，这是因为存在α'相（无分解）和沉淀。但是，在850°C和1000°C的温度下，热处理后的样品与不锈钢相比，具有更好的耐腐蚀性。