Mechanical Properties and Fracture Toughness of Ti-6Al-2Sn-4Zr-2Mo
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA
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The purpose of this program was to obtain mechanical property and toughness parameter data for Ti-6Al-2Sn-4Zr-2Mo in two heat-treated conditions. Solution temperatures of 1650 and 1790 F followed by an aging treatment at 1100 F were selected. Variables considered include specimen location and orientation, plus notch orientation for the toughness specimens. Light microscopy, X-ray, and fatigue crack growth patterns were also studied and correlated with the above parameters. The most significant finding in this investigation was the enhancement in toughness parameter data with increased heat treatment temperature. Impact and precracked Charpy WA values were approximately doubled and plane-strain fracture toughness values were increased roughly 17.
- Operations Research