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Design recommendations

DASt-Richtlinie 026

Fatigue Assessment in High-Frequency Hammer Applications

Recommendations for HFMI Treatments

Design recommendations for HFMI treated welded joints

Eurocode 3 - draft DIN EN 1993-1-9: 2023-03

provides design concepts for the proof of fatigue resistance of steel structures

IIW-Documents and further studies

Fatigue design of mild and high-strength steel cruciform joints in as-welded and HFMI-treated condition by nominal and effective notch stress approach

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Investigations on the impact of varying execution qualities of an HFH post-treatment and evaluation of simple methods for verifying the post-treatment trace

Study by the University of Stuttgart

Investigations on the application of High-Frequency Hammer Processes in hydraulic steel engineering

Study by the Universitiy of Stuttgart & KIT

Robustness of the HFMI techniques and the effect of weld quality on the fatigue life improvement of welded joints

This study once again confirms the high reproducibility of an HFMI treatment, even when considering different seam qualities

Fatigue strength assessment of HFMI-treated steel joints under variable amplitude loading

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Contribution of the fatigue enhancement of thin-walled, high-strength steel joints by HFMI treatment

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Quality assurance of HFMI-treatment regarding fatigue strength of fillet welds

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Crack propagation analysis and rehabilitation by HFMI of pre-fatigued welded structures

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Pneumatic Impact Treatment (PIT) – Application and Quality Assurance

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Overview of residual stress measurement and fatigue test data for PIT

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PITEC information

PIT Introduction

Overview of the PIT Technology

PIT Kurzpräsentation Polnisch

Kurzinformation zur PIT Technologie in polnisch

Other publications

High-Frequency Mechanical Impact (HFMI) - State of the technology

Published in Praktiker Magazine issue 01/2017

High residual stresses reduce plant failures

Published in MM MaschinenMarkt issue 22/2011

Anti Aging

Published in the journal "Instandsetzung" issue 07/2011

PIT proven in practice

Published in Praktiker Magazine issue 09/2010

Increase in service life and fatigue strength through weld seam post treatment

Published in Praktiker Magazine issue 09/2009

Pneumatic Impact Treatment for increased service life and fatigue resistance of welded constructions

Published in Steel Structure Journal issue 02/2009

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