Effect of plasma-sprayed alumina on the strength, elastic modulus, and damping of Ti-25Al-10Nb-3V-1Mo intermetallic

Journal Article · Thu Jun 01 00:00:00 EDT 1995 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/BF02649061· OSTI ID:82641

Vaidya, R U; Zurek, A K ^[1]; Wolfenden, A; Bowles, D A; Cantu, M W ^[2]

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1. Los Alamos National Lab., NM (United States). Materials Science and Technology
2. Texas A and M Univ., College Station, TX (United States). Dept. of Mechanical Engineering

The effect of a plasma-sprayed Al{sub 2}O{sub 3} coating on the bend strength, elastic modulus, and damping of Ti-25Al-10Nb-3V-1Mo intermetallic substrate was measured. Two coating thicknesses of 0.1 and 1.0 mm were used in the study. The average strength and Weibull coefficients of the intermetallic samples coated with the 0.1 mm Al{sub 2}O{sub 3} coating were very similar to those of the uncoated intermetallic samples. On the other hand, the average strength of the samples coated with 1.0 mm Al{sub 2}O{sub 3} was significantly lower than the strength of the uncoated intermetallic substrate. The lower strength of the 1.0 mm coated samples was attributed to the higher volume fraction of the Al{sub 2}O{sub 3} coating (which has a lower strength than the Ti-25Al-10Nb-3V-1Mo substrate) and higher porosity in the 1.0 mm coating. The Young`s modulus and damping values of the 0.1 mm Al{sub 2}O{sub 3}-coated intermetallic did not vary significantly from those of the uncoated substrate. However, the damping values of the 1.0 mm Al{sub 2}O{sub 3}-coated intermetallics were significantly larger than those of the uncoated substrate. The higher damping values measured for the 1.0 mm Al{sub 2}O{sub 3}-coated samples were attributed to the higher porosity in the thicker coating and to defects in the coating as a result of the spraying process.

• Sponsoring Organization: USDOE
• OSTI ID: 82641
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 3 Vol. 4; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
DAMPING
DEFECTS
FLEXURAL STRENGTH
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
PLASMA ARC SPRAYING
POROSITY
TITANIUM BASE ALLOYS
VANADIUM ALLOYS
YOUNG MODULUS