Effect of Cyclic Heating on the Properties of PEO Coatings on an UFG Ti–18Zr–15Nb Alloy

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发表日期：

2024年8月1日

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L. I. Zaynullina,
I. Z. Sharipov,
D. V. Gunderov,
R. G. Farrakhov,
E. V. Parfenov

摘要

Abstract—The temperature dependence of the Ti–18Zr–15Nb alloy dilation in an ultrafine-grained (UFG) state formed by equal-channel angular pressing (ECAP), which is coated using plasma-electrolytic oxidation (PEO), is investigated. The stability of the formed PEO coatings to heating and cooling has also been determined. The results demonstrate that a sharp increase in the thermal expansion coefficient (TEC) at 350°C indicates the presence of a phase transformation. During tests, a porous coating on the Ti–18Zr–15Nb alloy is retained, but cracks become larger and longer.