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Title: Laser Shock Peening Of A Titanium Alloy: Influence Of Process Parameters
Author: Cellard, Retraint, Rouhaud, Francois, Viguera-Sanc
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008105
Number of pages: 6
Abstract:
ABSTRACT
An investigation of the influence of laser shock peening parameters on a titanium alloy was undertaken. The samples were provided by SNECMA and are made of a material
representative of the alloys used in the aeronautic field: Ti-5Al-2Sn-2Zr-4Cr-4Mo (Ti-17). In order to quantify the effect of each process parameter, an experimental design
has been carried out (Sado, 2000). It is based on a full factorial design with 4 factors and 2 levels for each factor: thickness of the sample, laser fluence, pulse duration
and number of impacts. In addition, 7 additional experiments
were carried out: 3 to characterize the repeatability of the process and the order of the effects (linear or not) and 4 to evaluate the limits of the process. Altogether, 23
samples have been laser shocked. Only two parameters are kept constant: the sample material (Ti-17) and the covering rate (102-103%). Six variables have been measured: the
residual stress at the surface (ósurf), Ra, Rt, the Vickers microhardness, the width of the diffraction peaks and the curvature of the sample.
Laser shock peening, aircraft, experimental design, titanium alloy
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This page last revised: 03/22/2010