Hall-Petch and multiple linear regression equations for the prediction of mechanical properties in gamma-based titanium aluminides

Book · Wed Dec 31 04:00:00 EST 1997

OSTI ID:571741

Soboyejo, W O; Soboyejo, A B.O.; Ni, Y; Mercer, C ^[1]

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1. Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering

In a recent paper, Mercer and Soboyejo demonstrated the Hall-Petch dependence of basic room- and elevated-temperature (815 C) mechanical properties (0.2% offset strength, ultimate tensile strength, plastic elongation to failure and fracture toughness) on the average equiaxed/lamellar grain size. Simple Hall-Petch behavior was shown to occur in a wide range of extruded duplex {alpha}{sub 2}+{gamma} alloys (Ti-48Al, Ti-48Al-1.4Mn Ti-48Al-2Mn and Ti-48Al-1.5Cr). As in steels and other materials, simple Hall-Petch equations were derived for the above properties. However, the Hall-Petch equations did not include the effect of other variables that can affect the basic mechanical properties of gamma alloys. Multiple linear regression equations for the prediction of the combined effects of several (alloying, microstructure and temperature) variables on basic mechanical properties temperature are presented in this paper.

• Sponsoring Organization: National Science Foundation, Washington, DC (United States)
• OSTI ID: 571741
• Report Number(s): CONF-961202--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
INTERMETALLIC COMPOUNDS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
REGRESSION ANALYSIS
TEMPERATURE DEPENDENCE
THEORETICAL DATA
TITANIUM ALLOYS