Laser Surface Modification of Alloys for Corrosion and Erosion Resistance

Laser Surface Modification of Alloys for Corrosion and Erosion Resistance

1st Edition - March 20, 2012

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  • Editor: C T Kwok
  • eBook ISBN: 9780857095831

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Description

Corrosion and erosion processes often occur synergistically to cause serious damage to metal alloys. Laser surface modification techniques such as laser surface melting or alloying are being increasingly used to treat surfaces to prevent corrosion or repair corroded or damaged components. Laser surface modification of alloys for corrosion and erosion resistance reviews the wealth of recent research on these important techniques and their applications.After an introductory overview, part one reviews the use of laser surface melting and other techniques to improve the corrosion resistance of stainless and other steels as well as nickel-titanium and a range of other alloys. Part two covers the use of laser surface modification to prevent different types of erosion, including liquid impingement, slurry (solid particle) and electrical erosion as well as laser remanufacturing of damaged components.With its distinguished editor and international team of contributors, Laser surface modification of alloys for corrosion and erosion resistance is a standard reference for all those concerned with preventing corrosion and erosion damage in metallic components in sectors as diverse as energy production and electrical engineering.

Key Features

  • Reviews recent research on the use of laser surface modification techniques, including the prevention of corrosion and repair of corroded or damaged components
  • Discusses the techniques for improving the corrosion resistance of steels, nickel-titanium and a range of alloys
  • Analyses the use of laser surface modification to prevent different types of erosion, including liquid impingement and laser remanufacturing of damaged components

Readership

All those concerned with preventing corrosion and erosion damage in metallic components in sectors as diverse as energy production and electrical engineering

Table of Contents

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    Introduction

    Part I: Improving corrosion and cracking resistance

    Chapter 1: Laser surface modification of steel and cast iron for corrosion resistance

    Abstract:

    1.1 Introduction

    1.2 Laser surface treatments enhancing the corrosion resistance of ferrous alloys

    1.3 Transformation and microstructure of laser-treated steels and cast irons

    1.4 Applications: steel

    1.5 Applications: cast iron and other materials

    1.6 Acknowledgements

    Chapter 2: Laser surface melting (LSM) to repair stress corrosion cracking (SCC) in weld metal

    Abstract:

    2.1 Introduction

    2.2 Materials and experimental procedures

    2.3 Laser surface melting (LSM) treatment conditions for repair procedures

    2.4 Corrosion resistance of the laser surface melting (LSM) treatment zone

    2.5 Effect of residual stress on stress corrosion cracking (SCC) susceptibility

    2.6 Conclusions

    Chapter 3: Laser surface melting (LSM) of stainless steels for mitigating intergranular corrosion (IGC)

    Abstract:

    3.1 Introduction

    3.2 Merits of laser surface melting (LSM)

    3.3 Laser surface modifcation of stainless steels for mitigating intergranular corrosion (IGC)

    3.4 Experimental details

    3.5 Metallographic and microstructural analysis

    3.6 Intergranular corrosion (IGC) behavior

    3.7 Conclusions

    3.8 Acknowledgments

    Chapter 4: Pulsed laser surface treatment of multilayer gold–nickel–copper (Au/Ni/Cu) coatings to improve the corrosion resistance of components in electronics

    Abstract:

    4.1 Introduction

    4.2 Experimental arrangements

    4.3 Experimental results

    4.4 Numerical results

    4.5 Conclusions

    Chapter 5: Laser surface modification of nickel–titanium (NiTi) alloy biomaterials to improve biocompatibility and corrosion resistance

    Abstract:

    5.1 Introduction

    5.2 Fundamental characteristics of nickel-titanium (NiTi)

    5.3 Laser surface alloying of nickel–titanium (NiTi) with molybdenum (Mo)

    5.4 Conclusion

    Part II: Improving erosion-corrosion resistance

    Chapter 6: Laser surface modification of metals for liquid impingement erosion resistance

    Abstract:

    6.1 Introduction

    6.2 Experimental procedures

    6.3 Coating characteristics

    6.4 Liquid impact erosion characteristics

    6.5 Eroded surface morphology

    6.6 Correlation between mechanical properties and erosion resistance

    6.7 Conclusions

    6.8 Acknowledgments

    Chapter 7: Laser surface modification of steel for slurry erosion resistance in power plants

    Abstract:

    7.1 Introduction

    7.2 Surface engineering of hydroturbine steels

    7.3 Materials and processes

    7.4 Metallurgical performance of coatings

    7.5 Slurry erosion performance of coatings: an overview

    7.6 Impingement angle

    7.7 Effect of erodent size

    7.8 Effect of slurry velocity

    7.9 Effect of slurry concentration

    7.10 Erosion tests with river sand

    7.11 Development of correlation for erosion rate

    7.12 Conclusions

    7.13 Acknowledgements

    Chapter 8: Laser surface alloying (LSA) of copper for electrical erosion resistance

    Abstract:

    8.1 Introduction

    8.2 Experimental details

    8.3 Microstructural analysis

    8.4 Hardness and strengthening mechanisms

    8.5 Electrical erosion behavior and damage mechanism

    8.6 Corrosion behavior

    8.7 Interfacial contact resistance (ICR)

    8.8 Conclusions

    Acknowledgments

    Chapter 9: Laser remanufacturing to improve the erosion and corrosion resistance of metal components

    Abstract:

    9.1 Introduction

    9.2 Laser remanufacturing technology

    9.3 Application of laser remanufacturing for corrosion and erosion resistance of turbine blades

    9.4 Application of laser remanufacturing for corrosion and erosion resistance on injection molding machine screws

    9.5 Application of laser remanufacturing for corrosion and erosion resistance of petrochemical system alkali filters

    9.6 Application of laser remanufacturing for corrosion and erosion resistance of seawater circulating pump sleeves

    9.7 Conclusions

    Chapter 10: Laser surface remelting to improve the erosion–corrosion resistance of nickel–chromium–aluminium–yttrium (NiCrAlY) plasma spray coatings

    Abstract:

    10.1 Introduction

    10.2 Need and role of post-coating treatments

    10.3 Applications of laser remelted coatings to combat erosion and corrosion

    10.4 Advantages of laser remelting

    10.5 Role of nickel-chromium (Ni-Cr) coatings in aggressive environments

    10.6 Experimental procedure

    10.7 Experimental results

    10.8 Conclusions

    Index

Product details

  • No. of pages: 392
  • Language: English
  • Copyright: © Woodhead Publishing 2012
  • Published: March 20, 2012
  • Imprint: Woodhead Publishing
  • eBook ISBN: 9780857095831

About the Editor

C T Kwok

Chi Tat Kwok is Associate Professor in the Department of Electromechanical Engineering at the University of Macau, China. He is well-known for his research in corrosion and surface engineering.

Affiliations and Expertise

University of Macau, China

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