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Mei T.♦, Wang H.♦, Politis D. J.♦, Kowalewski Z. L., Liu X.♦, Zhang Q.♦, Investigation of the interactive friction coefficient of Titanium alloy in hot stamping processes: An experimental and modelling study,
TRIBOLOGY INTERNATIONAL, ISSN: 0301-679X, DOI: 10.1016/j.triboint.2026.112308, Vol.224, No.112308, pp.1-20, 2026 Abstract:
This study investigatesd the hot stamping friction behaviour of TC4 aolly sheet using a self-developed high-temperature sheet tensile tribometer. The effects of contact pressure, lubrication (dry vs. Y₂O₃ powder), sheet temperature, and sliding speed on the coefficient of friction (COF) and wear mechanisms were evaluated. Increasing contact pressure induced a transition from ploughing to adhesion-dominated wear, raising the COF. Y₂O₃ powder lubricant formed a protective film that reduced the COF, though its effectiveness degrades under high pressure or low temperature. Elevating the sheet temperature decreased surface hardness and promoted adhesive wear, resulting in a more than 54% reduction in COF. Furthermore, an interactive multi-physics-based COF prediction model was developed, which captures friction evolutions under different conditions with high accuracy (prediction errors <6.8%). These findings provide insights for friction control in the hot stamping of titanium alloys. Keywords:
TC4, Hot stamping process, Friction, Wear, Modelling Affiliations:
| Mei T. | - | other affiliation | | Wang H. | - | other affiliation | | Politis D. J. | - | Imperial College London (GB) | | Kowalewski Z. L. | - | IPPT PAN | | Liu X. | - | Imperial College London (GB) | | Zhang Q. | - | other affiliation |
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