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The development of high temperatures in titanium alloys during fast fracture

: Jagannadham, K.; Wilsdorf, H.G.F.; Kunze, H.-D.; Meyer, L.W.

1988, 6 pp. : Abb.,Tab.,Lit.
International Conference on Strength of Metals and Alloys <1988, Tampere>
Conference Proceedings
Fraunhofer IFAM ()
adiabatic shear; crack propagation; crack tip; ductile; fractography; fracture; high strain rate; microalignment; rupture of; SEM; temperature rise at; titanium alloy

A titanium alloy, Ti-10V-2Fe-3Al, was fractured in tensile loading at strain rates between 70 1/sec und 1000 1/sec. Fracture surfaces were investigated by scanning electron microscopy showing in all specimens areas characterized by a deterioration of the normal dimple structure. A computer model was developed that is capable of showing a large temperature increase at the fast moving crack tip. An additional temperature rise dure to the rupture of micro-ligaments can bring the localized temperature under certain conditions above the melting point of the alloy at the moment of final separation.