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Development of Lightweight Titanium-aluminide Piston Pin

Article of Honda R&D Technical Review F1 Special (The third Era Activities)

Summary

An intermetallic titanium aluminide material displaying increased fracture toughness and fatigue strength, and a process enabling the formation of the material into components, have been developed. Exploiting the material’s low specific gravity and high modulus of elasticity, it was employed to manufacture a piston pin, enabling the achievement of a 17% reduction in weight and a 28% increase in rigidity against a conventional nitriding steel piston pin. The developed piston pin has contributed to increased speed, power and long-distance reliability in V10 engines, which have been required to complete two race distances since 2005.

Reference

(1) Clemens, H., Kestler, H., Eberhardt, N., Knabl, W.: PROCESSING OF TiAl BASED ALLOYS ON AN INDUSTRIAL SCALE, The Minerals, Metals & Materials Society, Gamma Titanium Aluminides 1999, p. 209-223 (1999)
(2) http://www.thermocalc.se/, 2009/04/02
(3) JP, Patent Application No. 2000-24748

Author (organization or company)

Sadami MINATO(Automobile R&D Center)、Yasunori ONAHA(Automobile R&D Center)

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