Vickers and Knoop Micro-hardness Behavior of Coarseand Ultrafine-grained Titanium

J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (10): 904-907.

• High Temperature Structural Materials • Previous Articles Next Articles

Vickers and Knoop Micro-hardness Behavior of Coarseand Ultrafine-grained Titanium

K.P. Sanosh, A. Balakrishnan, L. Francis,T.N. Kim

1) Department of Information and Electronic Materials Engineering, College of Engineering, Paichai University, Daejeon, 302-735, Republic of Korea
2) Laboratoire SIMAP, GPM2 Grenoble-INP, UJF, CNRS 101 Rue de la Physique, BP46 38402 Saint Martin d0He0res Cedex, France
3) University of Genova, Department of Chemistry and Industrial Chemistry, via Dodecaneso 31, 16146, Genova, Italy

Received:2009-10-14 Revised:2010-03-15 Online:2010-10-31 Published:2010-10-29
Contact: Avinash Balakrishnan

Abstract

Abstract: The present study focuses on the relationship of hardness with grain size for commercially pure titanium (Cp-Ti) and ultra fine grained titanium (UFG-Ti) produced by equal channel angular process (ECAP) of Cp-Ti). ickers and Knoop indentations of UFG-Ti at different loads was ~2.5 times harder than those of Cp-Ti. X-ray diffraction (XRD) analysis showed peak broadening in UFG-Ti due to reduced grain size and micro-lattice trains. Scanning electron microscopy (SEM) revealed that ECAP had reduced the grain size of Cp-Ti by ~10 imes. Weibull statistics showed UFG-Ti with lower dispersion in hardness values compare to Cp-Ti indicating more uniform microstructure.

Key words: Vickers, Knoop, Hardness, Ultrafine-grained, Titanium

K.P. Sanosh A. Balakrishnan L. Francis T.N. Kim. Vickers and Knoop Micro-hardness Behavior of Coarseand Ultrafine-grained Titanium[J]. J Mater Sci Technol, 2010, 26(10): 904-907.

References

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Vickers and Knoop Micro-hardness Behavior of Coarseand Ultrafine-grained Titanium

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