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Laser shock peening: Performance and process simulation

K Ding and L Ye, University of Sydney, Australia

Woodhead Publishing Series in Metals and Surface Engineering No. 15

This is the first book to consolidate disparate knowledge on the subject into one comprehensive publication.
World of Metallurgy - ERZMETALL

 - provides for the first time, a comprehensive coverage of this important area
 - written by two world renowned experts

Laser shock peening (LSP) is an innovative surface treatment technique, which has been successfully applied to improve fatigue performance of metallic components. The key beneficial characteristic after LSP treatment is the presence of compressive residual stresses beneath the treated surface of metallic materials, mechanically produced by high magnitude shock waves induced by a high-energy laser pulse. Compared with the traditional shot peening (SP) process LSP can produce high magnitude compressive residual stresses of more than 1 mm in depth, 4 times deeper than traditional SP.

LSP has been intensively investigated in the last two decades with over 100 scientific papers and reports. Most studies and investigations are based on experimental approaches, focusing on understanding mechanisms of LSP and its influences on mechanical behaviours and in particular enhanced fatigue performance of treated metallic components. In most cases, there was a lack of comprehensive documentation in the relevant information in applications of LSP for various metallic alloys, such as materials properties, component geometry, laser sources, LSP parameters, and distribution of 3-D residual stresses. However, some comprehensive modelling capacities based on analytical models and dynamic finite element models (FEM) have been established for simulating LSP in the last decade, which provide unique tools for evaluation of LSP and optimization of residual stress distributions in relation to materials properties, component geometry, laser sources, and LSP parameters. Those approaches can play significant roles in design and optimization of LSP processes in practical applications.

Laser shock peening; Performance and process simulation consolidates the knowledge and experience in a comprehensive publication for the first time. It describes the mechanisms of LSP and its substantial roles in improving microstructure, surface morphology, hardness, fatigue life and strength, and stress corrosion cracking. In particular, it comprehensively describes simulation techniques and procedures with some typical case studies, which can be adopted by engineers and research scientists to design, evaluate and optimize LSP processes in practical applications.

It will be of particular interest to engineers and scientists who are working on development of valued-added surface treatment for critical metallic components such as turbine components and fastened joints in aerospace, marine and automotive applications.

ISBN 1 85573 929 1
ISBN-13: 978 1 85573 929 1
January 2006
172 pages  234 x 156mm  hardback  
£135.00 / US$230.00 / €160.00

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About the authors

Kan Ding is a Research Engineer at Comalco Research & Technical Support (CRTS) Comalco Aluminium Limited, Australia.

Lin Ye is a Professor at the School of Aerospace, Mechanical & Mechatronic Engineering, The University of Sydney

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Contents

General introduction
 - Laser shock peening
 - Traditional shot peening
 - Scope of book

Physical and mechanical mechanisms of LSP
 - Introduction
 - Laser system for LSP
 - Generation of shock wave
 - Measurement of residual stress
 - Characteristics of residual stresses induced by LSP
 - Modifications in surface morphology and microstructure
 - Effects on mechanical properties
 - Applications of LSP
 - Summary

Simulation methodology
 - Introduction
 - Physics and mechanics of LSP
 - Analytical modelling
 - FEM for LSP
 - FE analysis techniques
 - LSP simulation procedure
 - Summary

2-D simulation of single and multiple LSP
 - Introduction
 - LSP process
 - 2-D finite element simulation
 - Evaluation and discussion
 - Summary

3-D Simulation of single and multiple LSP
 - Introduction
 - Experimental
 - Analytical model
 - FE model
 - Results and discussion
 - Summary

2-D Simulation of two-sided LSP on thin sections
 - Introduction
 - LSP model
 - FE model
 - Evaluation of modelling
 - Effects of parameters
 - Summary

Simulation of LSP on curved surface
 - Introduction
 - LSP model
 - FE models
 - Evaluation and discussion
 - Summary