Fracture toughness of TiAl alloys: A comparison of two gamma-a2 structures

Toughness measurements of a Ti-45Al-2N4u-2Nb + 0.8%vol TiB2 alloy with a. near fully lamellar microstructure and a Ti-46Al-8Nb alloy with a convoluted microstructure are performed at 650 degrees C under vacuum according to ASTM Standard E1820. Respective values of K-Ic = 18 MPa root m and 20 MPa root m are found, with comparatively good repeatability the toughness of these two alloys is thus relatively similar, despite significant differences in miciostructure and crack path.


Published in:
STRUCTURAL ALUMINIDES FOR ELEVATED TEMPERATURES: GAMMA TITANIUM AND OTHER: METALLIC ALUMINIDES, 89-96
Presented at:
TMS 2008 Annual Meeting and Exhibition, New Orleans, March 9-13, 2008
Year:
2008
Publisher:
WARRENDALE, PA 15086-7514 USA, MINERALS, METALS & MATERIALS SOC
Keywords:
Laboratories:




 Record created 2008-10-30, last modified 2018-09-13


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