Water attenuation enhances tribological damage resistance in laser peened steel

Gowthaman, S and Tripathi, P and Ariharan, S and Ramkumar, J and Balani, K (2022) Water attenuation enhances tribological damage resistance in laser peened steel. In: Materials Letters, 308 .

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Abstract

In the present study, the effect of Laser Shock Peening (LSP) on wear characteristics of armor steel is investigated to mitigate the material degradation in tank barrels and prolong their service life. Tank barrels are exposed to enormous temperatures and pressures during rapid firing rounds, which invoke the material's failure and calls for a barrel replacement and the reinvestment of millions of dollars. LSP performed at different pulse energies (i.e., 450 mJ, 350 mJ, and 250 mJ) with varying attenuating media such as air, water, and silicone oil, have resulted in high wear resistance and superior mechanical properties compared to that of armor steel. Water attenuation with a pulse energy of 450 mJ has resulted in surface hardness of �495 ± 3 HV, compressive residual stresses of �319 ± 2 MPa, and exhibited minimum wear rate of �2.61 � 10-8 ± 0.04 � 10-8 mm3/N.m, capable of limiting wear and erosion problems, thereby enhancing the service life of tank barrels. © 2021 Elsevier B.V.

Item Type:	Journal Article
Publication:	Materials Letters
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Investments; Residual stresses; Silicones; Tribology; Wear resistance, Armor steel; Damage resistance; Exposed to; Laser process; Laser shock peening; Materials degradation; Pulse energies; Temperature and pressures; Wear and tribology; Wear characteristics, Wear of materials
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	22 Nov 2021 11:48
Last Modified:	22 Nov 2021 11:48
URI:	http://eprints.iisc.ac.in/id/eprint/70523

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