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July 26, 2026BHM Berg- und Hüttenmännische MonatshefteOpen Access

Hydrogen-induced Fractures in Large Fasteners

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Authors

HHHolger HocheMBMichael BrilzMOMatthias Oechsner

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Overview

This contribution analyzes the risk of hydrogen-induced failures in high-strength fasteners, highlighting implications for structural integrity.

Key Points

  • The study aims to investigate hydrogen-induced stress corrosion cracking in large-scale fasteners and their failure mechanisms.
  • Analysis of failure cases involving M42 to M64 bolts fractured due to hydrogen-induced stress corrosion cracking.
  • Examination of material conditions, coating-related factors, and installation practices contributing to cracks.
  • Conducted fractographic, microanalytical, and microstructural investigations of failed fasteners.
  • Failure observed within weeks or months post-installation in numerous cases.
  • Crack formation linked to improper surface hardness exceeding permissible limits and defects in the hot-dip galvanizing process.
  • Installation practices, particularly weather impacts causing uncontrolled preload forces, identified as critical factors.

Cite This Study

Hoche et al. (2026) studied this question.

synapsesocial.com/papers/6a65a3e4d3aea3239cd76c47https://doi.org/10.1007/s00501-026-01767-w
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