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Hall-Petch and Multiple Linear Regression Equations for the Prediction of Mechanical Properties in Gamma-Based Titanium Aluminides

Published online by Cambridge University Press:  15 February 2011

W. O. Soboyejo ,
A. B. O. Soboyejo ,
Y. Ni  and
C. Mercer
W. O. Soboyejo
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus OH 43210–1179
A. B. O. Soboyejo
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus OH 43210–1179
Y. Ni
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus OH 43210–1179
C. Mercer
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus OH 43210–1179
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In a recent paper, Mercer and Soboyejo [1] 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 α2-γ alloys (Ti-48A1, Ti-48Al-1.4Mn Ti-48Al-2Mn and Ti-48Al-1.5Cr). As in steels and other materials [2–5], simple Hall-Petch equations with were derived for the above properties [1]. However, the Hall-Petch equations did not include the effect of other variables that can affect to 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 183
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Mercer, C. and Soboyejo, W. O., Hall-Petch Relationships in Gamma Titanium Aluminides, Scripta Metallurgica et Materialia, 1996 (in press).Google Scholar
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