Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Shot Peening Versus Laser Shock Processing
Author: Banas, G. and Lawrence,Jr., F.V.
Source: Conf Proc: ICSP-4, (p. 95-104)
Publication year 1990
Document number: 1990071
Number of pages: 10
Abstract:
Shot peening and laser shock processing effect on residual stress, hardness, and fatigue behaviour of welded 18 Ni(250) maraging steel is presented in this paper.
Initiation-propagation model was used for fatigue strength predictions of as-welded, shot-peened, and laser-shock-treated specimens. Elastic stress concentration factor
(K[t]) was determined using finite element analysis considering both tensile and bending stresses. Laser shock processing as well as shot peening altered both hardness and
residual stress state of welded specimens; there was an increase in both hardness and compressive residual stresses. Fatigue strength was also higher, however, laser shock
processing gave better performance in longer lives (>10[5] cycles), while in shorter lives (<10[5] cycles) no significant difference was found between shot peening and laser
shock processing. The comparison of predicted and experimental results showed an agreement within 10-20%.
Descriptors: Weldments; Shot peening; Laser shock precessing; Metallic fatigue; Residual stresses; Hardness
Download full text pdf file
www.shotpeener.com
This page last revised: 04/24/2008