SEDL / STP / STP563-EB / STP32192S

Instrumented Impact Testing of Titanium Alloys

Ewing, A
California State University, Long Beach, Calif.

Raymond, L
Head, Metallurgy Research, Materials Sciences Laboratory, The Aerospace Corporation, El Segundo, Calif.

Pages: 23    Published: Jan 1974

Download this paper for $25 PDF (452K)          View License Agreement
Abstract

The dynamic fracture toughness was determined for two titanium alloys (Ti-6A1-4V and Ti-6A1-6V-2Sn) from different suppliers and in various heat-treated conditions. The strain-rate effect associated with the dynamic test is shown to increase the fracture toughness for all the alloys with the exception of mill-annealed and duplex-annealed Ti-6A1-6V-2Sn, where the fracture toughness was found to be independent of strain rate. Dial energy per unit specimen area (W/A)d for precracked Charpy specimens can be used to calculate KId as long as a relatively flat fracture appearance (small shear area) is obtained. Otherwise, when a large amount of shear is present, the energy to maximum load (W/A)^m or P^max from the load-time trace must be used to calculate KId.