Paper Title:
Effects of Severe Air Blast Shot Peening on Microstructure and Residual Stress State of Al Alloys
  Abstract

Surface grain refinement is a relatively new process aimed to enhance mechanical material properties. In this study Al7075-T6 bars have been shot peened with parameters much different from those of conventional shot peening. Microstructure gradient has been observed by means of transmission electron microscopy (TEM), X-ray diffraction (XRD) and nano indentation tester. A fine grained layer was found on top surface of the specimens. Measurements indicate of notable improvements in cases of hardness and elastic modulus in comparison with untreated material. XRD results also show significant depth affected both in terms of residual stress and FWHM. The results imply that using optimized shot peening parameters, it would be possible to create a fine grained layer on surface of component and consequently increase fatigue life and any other property affected by grain size.

  Info
Periodical
Key Engineering Materials (Volumes 417-418)
Edited by
M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee
Pages
393-396
DOI
10.4028/www.scientific.net/KEM.417-418.393
Citation
M. Guagliano, S. Bagherifard, I. Fernàndez Parienete, R. Ghelichi, "Effects of Severe Air Blast Shot Peening on Microstructure and Residual Stress State of Al Alloys", Key Engineering Materials, Vols. 417-418, pp. 393-396, 2010
Online since
October 2009
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Price
$32.00
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