Abstract
In this paper, the contact condition between Ti–6Al–4V specimens and heated tool steel is studied with the purpose of calculating the heat transfer coefficient (HTC) and coefficient of friction (COF) at the interface of the specimens and the tools. Three types of surfaces that are, Ti–6Al–4V specimens with no coating, 40 and 80 µm of glass coating have been analyzed in this study. The paper first presents the experimental results of HTC tests and ring compression tests and then, two Finite Element (FE) numerical models are developed and applied for calculation of the HTC and COF value under three aforementioned surface conditions. The final results are the identification of both coefficients and the identification of the most promising surface condition, when forging Ti–6Al–4V specimens at temperatures about 940 °C.
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