Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Laser Peening Without Coating: Process, Effects And Applications
Author: Y. Sano, N. Mukai, M. Obata
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008104
Number of pages: 6
Abstract:
ABSTRACT
This paper reviews the current status of research, development and application on laser peening without coating (LPwC). LPwC imparts compressive residual stress on material
by irradiating laser pulses under aqueous environment without any surface preparation. LPwC can be operated without restriction on absorption by water, using
water-penetrable green lasers. The effect penetrates 1mm or more, much deeper
than that of conventional surface treatment such as shot peening. Accelerating stress corrosion cracking (SCC) tests showed that LPwC effectively prevented the initiation of
SCC in sensitized austenitic stainless steels, nickel-based alloys and their weld metals. LPwC remarkably improved high-cycle fatigue properties of steels, aluminum alloys,
titanium alloys. Retardation of crack propagation due to stress corrosion and
fatigue was also confirmed. LPwC has been utilized to prevent SCC in Japanese nuclear power plants (NPPs) since 1999.
KEY WORDS
Laser peening, Residual stress, Stress corrosion cracking, Fatigue
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