Effect of hydrogen on the tensile properties of a Ti-47Al-2Cr-0.2Si sheet under electrolytic charging conditions
- Univ. of Puerto Rico (Puerto Rico). Dept. of Mechanical Engineering
- Plansee AG, Ruette (Austria)
New advanced materials based on gamma titanium alloys, commonly called gamma titanium aluminides or {gamma}-alloys, have been considered to be potential future materials for application in aerospace and automobile industries because of their good specific properties. The focus of this investigation is to determine the mechanical properties for Ti-47Al-2Cr-0.2Si, specifically yield strength, tensile strength and ductility, as a function of hydrogen charging time at room temperature. Because of the high degree of sensitivity of the mechanical properties of these alloys to microstructure, two different microstructural conditions, obtained from different heat treatments, were examined: Primary annealed (PA) and near-gamma (NG). PA is referred to the microstructure which is developed during the annealing treatment used to flatten the sheet after rolling. The microstructure consists of equiaxed {gamma}-grains, finely dispersed {alpha}{sub 2}-particles on {gamma}-grain boundaries and triple points and a small amount of {gamma}/{alpha}{sub 2} lamellar grains. During the NG heat-treatment the lamellar grains are dissolved and the {gamma}-grains undergo grain growth. Detailed information on the evolution of the microstructure of sheet material heat-treatments is given elsewhere.
- OSTI ID:
- 585989
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 1 Vol. 38; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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