Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Influence Of Shot Peening Treatment On The Fatigue Life Of Ti6ai4v Eli Biomedical Alloy
Author: S. Amin-Yavari, A.A. Ziaei-Moayed, H.R. Madaah-Hos
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008096
Number of pages: 6
Abstract:
ABSTRACT
Fatigue lives of shot peened specimens have been evaluated by Rotating – Bending fatigue tests at two stress levels of 625 and 675 MPa. Combination of surface work
hardening, compressive residual stresses and surface roughness were obtained by changing the bead size and peening time. Compressive residual stresses, hardness and
roughness were measured by X-ray diffraction, microhardness and profilometry.
Fatigue lives at the optimum combination of the as mentioned parameters increased by 2.7 and 1.9 times in compare to unpeened surface life. Fracture surfaces were evaluated
by Scanning Electron Microscopy. It is found that, the effect of surface roughness among the three variables is more pronounced. Fractography of fatigue fracture surfaces
with high fatigue lives showed that while crack nucleation site was shifted to subsurface layers, the nucleation site for the roughened specimens was again at the surface.
KEY WORDS: Ti6Al4V ELI alloy, fatigue, shot peening, compressive residual stress, surface roughness.
This ICSP paper is not available until September of 2011. You may purchase the complete conference procedings ICSP-10 for $230 at Electronics Inc +1-574-256-5001
www.shotpeener.com
This page last revised: 03/22/2010