Strain-Rate Dependence of Vacancy Cluster Size in Hydrogen-Charged Martensitic Steel AISI410 under Tensile Deformation

Kazuki Sugita; Yasumasa Mutou; Yasuharu Shirai

doi:10.4028/www.scientific.net/DDF.373.171

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Strain-Rate Dependence of Vacancy Cluster Size in Hydrogen-Charged Martensitic Steel AISI410 under Tensile Deformation

Abstract:

The strain-rate dependence of vacancy cluster sizes in hydrogen-charged martensitic steel AISI410 under tensile deformation was investigated using positron lifetime spectroscopy. The vacancy-cluster sizes in hydrogen-charged samples tended to increase with decreasing strain rates during the tensile deformations. The vacancy-cluster sizes significantly correlated to the tensile elongations to fracture. It was revealed that the presence of large-sized vacancy-clusters can cause the degradation of mechanical properties and followed by brittle fracture.

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Periodical:

Defect and Diffusion Forum (Volume 373)

Pages:

171-175

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.373.171

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Online since:

March 2017

Authors:

Kazuki Sugita*, Yasumasa Mutou, Yasuharu Shirai

Keywords:

AISI410, Hydrogen Brittleness, Positron Lifetime Spectroscopy, Vacancy Cluster

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References

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