Mukhopadhyay, Anoop Kumar and Joshi, Keshaw D. and Dey, Arjun and Chakraborty, Riya and Rav, Amit and Mandal, Ashok Kumar and Ghosh, Jiten and Bysakh, Sandip and Biswas, Sampad Kumar and Gupta, Satish C (2010) Nanoindentation of shock deformed alumina. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 527 (24-25). pp. 6478-6483. ISSN 0921-5093

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Abstract

In the current study, the experimental results on the nanoindentation response of both as prepared and shock recovered alumina of 10 mu m grain size and identical processing history are presented and analyzed. The shock recovery experiments were deliberately conducted with gas gun arrangements at shock pressures much above the Hugoniot Elastic Limit (HEL) of alumina. The nanoindentation experiments were conducted at 10-1000 mN load with a Berkovich indenter. The nanohardness and Young's modulus value of shock recovered alumina were always lower than those of the as prepared alumina samples. Subsequently, the detailed characterizations of the shock recovered alumina samples by X-ray diffraction, scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) were utilized to understand the reasons behind the drop in nanohardness and Young's modulus of shock recovered alumina samples. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Alumina; Shock experiment; Nanoindentation; Deformation; Fracture
Subjects:	Engineering Materials
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	14 Feb 2012 12:40
Last Modified:	14 Feb 2012 12:40
URI:	http://cgcri.csircentral.net/id/eprint/818

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