IIW Recommendations for the HFMI Treatment

For Improving the Fatigue Strength of Welded Joints

  • Gary B. Marquis
  • Zuheir Barsoum

Part of the IIW Collection book series (IIWC)

Table of contents

About this book


This book of recommendations presents an overview of High Frequency Mechanical Impact (HFMI) techniques existing today in the market and their proper procedures, quality assurance measures and documentation. Due to differences in HFMI tools and the wide variety of potential applications, certain details of proper treatments and quantitative quality control measures are presented generally. An example of procedure specification as a quality assurance measure is given in the Appendix.

Moreover, the book presents procedures for the fatigue life assessment of HFMI-improved welded joints based on nominal stress, structural hot spot stress and effective notch stress. It also considers the extra benefit that has been experimentally observed for HFMI-treated high-strength steels.

The recommendations offer proposals on the effect of loading conditions like high mean stress fatigue cycles, variable amplitude loading and large amplitude/low cycle fatigue cycles. Special considerations for low stress concentration welded joints are also given. In order to demonstrate the use of the guideline, the book provides several fatigue assessment examples.


High Frequency Mechanical Impact HFMI welded structures quality assurance measures fatigue life assessment nominal stress structural hot spot stress effective notch stress HFMI-treated high-strength steels high mean stress fatigue variable amplitude loading low cycle fatigue

Authors and affiliations

  • Gary B. Marquis
    • 1
  • Zuheir Barsoum
    • 2
  1. 1.Aalto University HelsinkiFinland
  2. 2.KTH Royal Institute of Technology StockholmSweden

Bibliographic information

  • DOI
  • Copyright Information Springer Science+Business Media Singapore 2016
  • Publisher Name Springer, Singapore
  • eBook Packages Engineering Engineering (R0)
  • Print ISBN 978-981-10-2503-7
  • Online ISBN 978-981-10-2504-4
  • Series Print ISSN 2365-435X
  • Series Online ISSN 2365-4368
  • Buy this book on publisher's site
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