Effect of Multipath Laser Shock Processing on Microhardness, Surface Roughness, and Wear Resistance of 2024-T3 Al Alloy

Abstract

Laser shock processing (LSP) is an innovative surface treatment technique with high peak power, short pulse, and cold hardening for strengthening metal materials. LSP is based on the application of a high intensity pulsed laser beam (I > 1 GW/cm2; t < 50 ns) at the interface between the metallic target and the surrounding medium (a transparent confining material, normally water) forcing a sudden vaporization of the metallic surface into a high temperature and density plasma that immediately develops inducing a shock wave propagating into the material. The shock wave induces plastic deformation and a residual stress distribution in the target material. In this paper we study the increase of microhardness and surface roughness with the increase of laser pulse energy in 2024-T3 Al alloy. The influence of the thickness of the confining layer (water) on microhardness and surface roughness is also studied. In addition, the effect of LSP treatment with best conditions on wear behaviors of the alloy was investigated.

Determination the wear rate by using XRF technique for Kovar alloy under lubricated

“…This leads to minimize the wear rate for all specimens under testes. This result agrees well with some references [51][52][53][54][55][56][57]. The main points were concluded from this work can be summarized as follows: 1-The qualitative and quantitative determination for elements in lubricating oils can be performed in a few minutes for each element.…”

The structure and optical properties of Lithium Niobate grown on quartz for photonics application

“…Optical waveguides comprised of hetero-materials efficiently confine propagating light because of large difference in refractive indices between the film and the substrate [13]. Therefore, LiNbO3s have been grown by several techniques including liquid-phase epitaxy [14], Ion Beam Sputtering [15], RF magnetron sputtering [16], molecular beam epitaxy [17], metalorganic chemical vapor deposition [18], pulsed-laser deposition (PLD) [19], thermal plasma spray chemical vapor deposition [20], electron-cyclotron-resonance (ECR) plasma sputtering [21], electron beam irradiation [22] and pulsed laser ablation (PLA) [23].…”

Evaluation of Zirconia Nanofiller and Brass Alloy Assembly by X-Ray Radiography

“…The interaction of X-rays with the examined parts shows defects in these parts due to the difference in absorption of X-rays by defects and the parts without defects. This behavior is expressed according to the following equation [25,26,27,28]:…”