Lightweight potential of welded high-strength steel joints from S700 under constant and variable amplitude loading by high-frequency mechanical impact (HFMI) treatment

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Researchers

Research units

  • KTH Royal Institute of Technology
  • Fraunhofer Institute for Structural Durability and System Reliability LBF

Abstract

Investigations with longitudinal stiffeners of the steel grade S700 under fully-reversed, constant amplitude loading and under variable amplitude loading with a straight-line spectrum show impressive fatigue strength improvement by high-frequency mechanical impact (HFMI) treatment. However, the degree of improvement was for variable amplitude loading lower when compared to constant amplitude loading due to local plasticity which occurs during larger load levels and consequently reduces the beneficial compressive residual stresses. Apart from the HFMI-treatment, the exceedance of constant amplitude loading (Woehler-lines) by variable amplitude loading (Gassner-lines) offers further lightweight potential, despite the lower degree of improvement by HFMI under spectrum loading.

Details

Original languageEnglish
Title of host publication3rd International Conference on Material and Component Performance under Variable Amplitude Loading, VAL2015
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Material and Component Performance under Variable Amplitude Loading - Prague Congress Centre, Prague, Czech Republic
Duration: 23 Mar 201526 Mar 2015
Conference number: 3
http://www.val-conf.org/

Publication series

NameProcedia Engineering
PublisherElsevier
Volume101
ISSN (Print)1877-7058

Conference

ConferenceInternational Conference on Material and Component Performance under Variable Amplitude Loading
Abbreviated titleVAL
CountryCzech Republic
CityPrague
Period23/03/201526/03/2015
Internet address

    Research areas

  • Constant and variable amplitude loading, High-frequency mechanical impact treatment, High-strength steel, Lightweight design, Longitudinal stiffeners

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