Joshi, K D and Mukhopadhyay, Anoop Kumar and Dey, A and Rav, A S and Biswas, S and Gupta, S C (2012) Mechanical properties of shock treated aluminium alloy Al 2024-T4. Journal of Physics: Conference Series, 377 (1). Article No-012045. ISSN 1742-6588

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Abstract

Plate impact experiment has been carried out on Al 2024-T4 alloy using single stage gas gun. The dynamic yield strength and spall strength of Al 2024-T4 sample has been determined to be 0.35 GPa and 1.43 GPa, respectively, from free surface velocity history measured using VISAR. The sample recovered after unloading from peak shock pressure of 4.4 GPa along with an unshocked sample is analyzed for mechanical properties using nano-indentation and scanning electron microscopy (SEM). The nano-indentation measurements reveal that the hardness and Young's modulus for unshocked sample remains unchanged as a function of load (equivalently depth), however, the same for shocked sample decreases monotonically with increase of load up to �40 mN and on further increase of load it remains unchanged, suggesting the (i) increase in hardness of shock loaded sample; (ii) the increase in hardness is limited to certain depth, which in our case is 845.12 ± 43.16 nm.

Item Type:	Article
Additional Information:	Conference of 23rd International Conference on High Pressure Science and Technology, AIRAPT-23; Conference Date: 25 September 2011 through 30 September 2011; Conference Code: 91979
Uncontrolled Keywords:	Dynamic yield; Free surface velocity; Gas gun; Nano-indentation measurements; Plate impact; Shock pressure; Single stage; Spall strength; Young's Modulus, Hardness; Scanning electron microscopy; Technology; Unloading, Aluminum
Subjects:	Engineering Materials
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	07 Feb 2013 13:18
Last Modified:	07 Feb 2013 13:18
URI:	http://cgcri.csircentral.net/id/eprint/1874

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