A Combined Study of Surface Roughness in Polycrystalline Aluminum During Uniaxial Deformation Using Laser-Induced Photoemission and Confocal Microscopy

Published

January 23, 2007

Author(s)

M Cai, Mark R. Stoudt, Lyle E. Levine, J T. Dickinson

Abstract

A new technique inegrating measurements of photo stiulated electron (PSE) emission and scanning laser confocal microscopy (SLCM) has been developed to characterize the deformation of an aluminium alloy in uniaxial plastic strain. Real time, in situ PSE signals provide details about the evolution and propagation rates of surface events during the deformation process. High-resolution SLCM measurements yield details describing the magnitude and spatial distribution of the surface features. During homogeneous deformation, the uniform generation of surface area produces a monotonic increase in the PSE intensity whereas the onset of necking induces a saturation condition. Analysis of the surface area created by the deformation revealed that the surface area generation rate correlates well with the PSE intensity. the consistencies in the data acquired with the two techniques signify they yield complementary information and that the combination provides essential details about the deformation process in a low hardness material such as an aluminium alloy.

Citation

A Combined Study of Surface Roughness in Polycrystalline Aluminum During Uniaxial Deformation Using Laser-Induced Photoemission and Confocal Microscopy

Volume

87

Issue

6

Pub Type

Others

Keywords

aluminium, photo stimulated electron emission, plastic deformation, scanning laser confocal microscopy, surface roughness

Citation

Cai, M. , Stoudt, M. , Levine, L. and Dickinson, J. (2007), A Combined Study of Surface Roughness in Polycrystalline Aluminum During Uniaxial Deformation Using Laser-Induced Photoemission and Confocal Microscopy, A Combined Study of Surface Roughness in Polycrystalline Aluminum During Uniaxial Deformation Using Laser-Induced Photoemission and Confocal Microscopy (Accessed October 10, 2025)