Hydrogen Embrittlement Detection Technology Using Nondestructive Testing for Realizing a Hydrogen Society
Yamato Abiru1, Hiroshi Nishiguchi1, Masato Maekawa2
1National Institute of Technology, Sasebo College, Nagasaki 857-1193, Japan.
Materials (Basel, Switzerland)
|September 14, 2024
Summary
Hydrogen accelerates crack growth in steel pipes by 10 times, compromising infrastructure safety. Early detection methods are vital for identifying these hydrogen-induced cracks in critical components.
Area of Science:
- Materials Science
- Mechanical Engineering
- Corrosion Science
Background:
- Ensuring the safety and reliability of hydrogen infrastructure is paramount.
- High-pressure hydrogen gas components, like steel pipes, are susceptible to crack propagation.
- Hydrogen embrittlement poses a significant risk to material integrity.
Purpose of the Study:
- To investigate the effect of hydrogen precharging on crack propagation in steel piping under cyclic compressive loads.
- To compare crack growth rates and fracture morphologies between hydrogen-charged and uncharged specimens.
- To evaluate the efficacy of nondestructive testing methods for detecting hydrogen-induced cracks.
Main Methods:
- Steel pipe specimens were hydrogen-precharged via immersion in ammonium thiocyanate solution.
- Cyclic compressive loads were applied to induce crack propagation.
- Nondestructive testing methods, including eddy current and hammering tests, were employed for crack detection.
Main Results:
- Crack growth rate in hydrogen-precharged specimens was approximately 10 times faster than in uncharged specimens.
- Cracks propagated from the inner to outer surfaces of the pipe in hydrogen-charged samples.
- Fracture surface morphology differed significantly: flat surfaces in hydrogen-precharged materials versus convex/concave in uncharged materials.
- Eddy current and hammering tests effectively differentiated between the presence of large and half-size cracks in hydrogen-affected and unaffected materials.
Conclusions:
- Hydrogen precharging significantly accelerates crack propagation in steel piping.
- The observed differences in fracture morphology and crack behavior underscore the detrimental effects of hydrogen.
- Effective early detection of hydrogen-induced cracks is crucial for maintaining the safety and integrity of hydrogen infrastructure.
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