Titanium alloys are commonly heat-treated to meet specific design requirements. In an effort to possibly create a better composite, the influence of heat treatments on the damage evolution and strength of a SiC/Ti-15-3 metal matrix composite (MMC) was studied. Heat treatments of 450°C and 700°C for 24 hours were performed on axial and transverse unidirectional specimens. These specimens, in addition to specimens in the as-received condition, were tested under nonproportional loading paths and then microstructurally analyzed to determine the induced damage. The axial composite with the 450°C heat treatment showed the highest elastic modulus and the lowest stiffness reduction than the other heat treatment conditions. The transverse composite in the as-received condition showed the highest room temperature elastic modulus and the lowest stiffness reduction compared with other heat treatment conditions. Typical damage modes of Ti MMC’s, such as fiber/matrix debonding and matrix microcracking, were seen in all heat treatments. A micromechanics model based on the Mori-Tanaka averaging scheme was implemented to simulate the effects of micro-cracking induced damage on composite stiffness reduction. [S0094-4289(00)01101-4]
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January 2000
Technical Papers
Influence of Heat Treatment on the Mechanical Properties and Damage Development in a SiC/Ti-15-3 MMC
David A. Miller,
David A. Miller
Department of Aerospace Engineering, Center for Mechanics of Composites, Texas A&M University, College Station, TX 77843-3141
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Dimitris C. Lagoudas
Dimitris C. Lagoudas
Department of Aerospace Engineering, Center for Mechanics of Composites, Texas A&M University, College Station, TX 77843-3141
Search for other works by this author on:
David A. Miller
Department of Aerospace Engineering, Center for Mechanics of Composites, Texas A&M University, College Station, TX 77843-3141
Dimitris C. Lagoudas
Department of Aerospace Engineering, Center for Mechanics of Composites, Texas A&M University, College Station, TX 77843-3141
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division August 5, 1997; revised manuscript received May 3, 1999. Associate Technical Editor: S. A. Meguid.
J. Eng. Mater. Technol. Jan 2000, 122(1): 74-79 (6 pages)
Published Online: May 3, 1999
Article history
Received:
August 5, 1997
Revised:
May 3, 1999
Citation
Miller , D. A., and Lagoudas , D. C. (May 3, 1999). "Influence of Heat Treatment on the Mechanical Properties and Damage Development in a SiC/Ti-15-3 MMC ." ASME. J. Eng. Mater. Technol. January 2000; 122(1): 74–79. https://doi.org/10.1115/1.482768
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