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Compression, Bend, and Tension Studies on Forged Al67Ti25Cr8 and Al66Ti25Mn9 L12 Compounds

Published online by Cambridge University Press:  26 February 2011

K.S. Kumar ,
S. A. Brown  and
J.D. Whittenberger
K.S. Kumar
Affiliation:
Martin Marietta Laboratories, Baltimore, MD 21227
S. A. Brown
Affiliation:
Martin Marietta Laboratories, Baltimore, MD 21227
J.D. Whittenberger
Affiliation:
NASA Lewis Research Center, Cleveland, OH 44135
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Abstract

Cast, homogenized, and isothermally forged aluminum-rich L12 compounds Al87Ti25Cr8 and Al66Ti25Mn9 were tested in compression as a function of temperature and as a function of strain rate at elevated temperatures (1000K and 1100K). Three-point bend specimens were tested as a function of temperature in the range 300K to 873K. Strain gages glued on the tensile side of the ambient and 473K specimens enabled direct strain measurements. A number of “buttonhead” tensile specimens were electro-discharge machined, fine polished, and tested between ambient and 1073K for yield strength and ductility as a function of temperature. Scanning electron microscope (SEM) examination of fracture surfaces from both the bend and tensile specimens revealed a gradual transition from transgranular cleavage to intergranular failure with increasing temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 481
Copyright
Copyright © Materials Research Society 1991

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References

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