On the loading rate sensitivity of plastic deformation in molecular crystals

Raut, Devaraj and Kiran, Mangalampalli SRN and Mishra, Manish Kumar and Asiri, Abdullah M and Ramamurty, Upadrasta (2016) On the loading rate sensitivity of plastic deformation in molecular crystals. In: CRYSTENGCOMM, 18 (20). pp. 3551-3555.

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Abstract

The nanoindentation technique is being widely utilized to measure the mechanical properties of small single crystals of molecular materials. However, all the experiments reported hitherto were performed under quasi-static conditions and at relatively low loading rates. ``Will the plastic response change if the tests are performed at high strain rates?'' is a question we address in this communication. For this, we have examined the strain rate sensitivity of nanoindentation responses on the major faces of four different molecular crystals: L-alanine, saccharin, p-nitroaniline, and sulfathiazole. Experimental results indicate that the measured hardness values are loading rate insensitive. The possible reasons for this insensitivity and implications for applications in pharmaceutical manufacturing are discussed.

Item Type:	Journal Article
Publication:	CRYSTENGCOMM
Publisher:	ROYAL SOC CHEMISTRY
Additional Information:	Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	16 Jun 2016 07:41
Last Modified:	16 Jun 2016 07:41
URI:	http://eprints.iisc.ac.in/id/eprint/54015

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