Laser Shocking Nano-Crystallization and High-Temperature Modification Technology
The aim of this book is to present foundational research on the nano-crystallization, high-temperature modification, micro-structure evolution, and plastic deformation induced by laser shock processing. In this regard, the focus is on heat-resistant steel
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Laser Shocking Nano-Crystallization and High-Temperature Modification Technology
Laser Shocking Nano-Crystallization and High-Temperature Modification Technology
Xudong Ren
Laser Shocking Nano-Crystallization and High-Temperature Modification Technology
123
Xudong Ren Jiangsu University Zhenjiang People’s Republic of China
ISBN 978-3-662-46443-4 DOI 10.1007/978-3-662-46444-1
ISBN 978-3-662-46444-1
(eBook)
Library of Congress Control Number: 2015932418 Springer Heidelberg New York Dordrecht London © Springer-Verlag Berlin Heidelberg 2015 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. Printed on acid-free paper Springer-Verlag GmbH Berlin Heidelberg is part of Springer Science+Business Media (www.springer.com)
Preface
Laser shock processing, or laser shock peening (LSP), is the process of hardening or strengthening metal using a powerful laser. It could generate a layer of residual compressive stress on a surface of metallic materials and alloys that is several times deeper than that attainable from conventional shot peening treatments (shot peening), which has been successfully applied to improve fatigue performance of metallic components. LSP is a new surface modification technology, which uses high strength impact wave of the interaction process between high power density (GW/cm2) lasers and materials to generate residual compressive stress and high-density dislocation, and improves the mechanical properties of metal effectively, especially the metal materials of hardness, residual stress distribution, and resist fatigue life. When the pressure of high strength impact shockwave exceeds the dynamic yield strength of the metal, the shock wave would induce severe plastic deformation in the surface layer of the metals and alloys. Since laser could be easily directed to fatigue-critical areas, LSP is expected to be widely applicable for improving the fatigue properties of alloys. LSP also has the obvious advantages including no contact and heataffected zone, excell
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