SYMPOSIA PAPER Published: 01 January 1976
STP28654S

Fatigue Crack Growth and J-Integral Fracture Parameters of Ti-6Al-4V at Ambient and Cryogenic Temperatures

Source

Fatigue crack propagation and fracture parameters for 2.03-cm-thick compact specimens of an extra-low-interstitial Ti-6Al-4V alloy were measured at temperatures between 295 K (70°F) and 4 K (−453°F). Plane-strain linear-elastic and J-integral fracture toughness test results were in good agreement: the KIc values for this alloy decreased from 105 MN/m3|2 at room temperature to 54 MN/m3vb2 at 4 K, and a ductile-to-brittle fracture transition occurred in the range 125 to 76 K (−235 to −323°F). Despite this transition, the fatigue crack growth rates (da/dN) of this alloy remained temperature insensitive over the entire ambient-to-cryogenic range. These fatigue and fracture results are compared with data previously reported for a normal-interstitial Ti-6Al-4V alloy.

Author Information

Tobler, RL
Properties of Solids Section, Cryogenics Division, Institute for Basic Standards, National Bureau of Standards, Boulder, Colo.
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Details
Developed by Committee: E08
Pages: 346–370
DOI: 10.1520/STP28654S
ISBN-EB: 978-0-8031-4676-1
ISBN-13: 978-0-8031-0318-4