In-Situ Observation for Elucidation of Stress Corrosion Cracking Mechanism in High-Temperature and High-Pressure Water

Tomoyuki Fujishiro; Takahisa Shobu; Koji Kiriyama; Atsushi Yamamoto

doi:10.4028/www.scientific.net/MSF.652.285

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HomeMaterials Science ForumMaterials Science Forum Vol. 652In-Situ Observation for Elucidation of Stress...

In-Situ Observation for Elucidation of Stress Corrosion Cracking Mechanism in High-Temperature and High-Pressure Water

Abstract:

In-situ diffraction measurements were carried out on a tensile specimen of SUS304 stainless steel using a small autoclave at BL22XU at SPring-8. The temperature of circulating water in the autoclave was changed from room temperature to 561 K under ambient pressure and also under a pressure of 8.8 MPa. Tensile stress of 260 MPa was applied to the specimen at 561 K under 8.8 MPa, and a two dimensional strain distribution was obtained by calculation based on measured lattice spacings of the γ-Fe311 plane under various conditions. The interior region of the specimen showed higher strain compared with that on the surface region. After the tensile deformation in the autoclave, CT images of cross sections of the specimen were taken. Void-like images with about 50 μm in size were observed.

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Periodical:

Materials Science Forum (Volume 652)

Pages:

285-289

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.652.285

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Online since:

May 2010

Authors:

Tomoyuki Fujishiro, Takahisa Shobu, Koji Kiriyama, Atsushi Yamamoto

Keywords:

Boiling Water Reactor, In Situ Observation, Strain Measurement, Stress Corrosion Cracking (SCC), SUS304, Synchrotron Radiation Facility SPring-8

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