X-Ray Study on Deformation and Fracture of Solid. Penetration Depth in X-Ray Analysis of Steep Stress Gradient Near Surface.
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- SUZUKI Kenji
- Faculty of Education, Niigata Univ.
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- TANAKA Keisuke
- Dept. of Mech. Eng., Nagoya Univ.
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- SAKAIDA Yoshihisa
- Japan Fine Ceramics Center
Bibliographic Information
- Other Title
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- x線材料強度 表面近傍の残留応力勾配解析におけるX線侵入深さ
- ヒョウメン キンボウ ノ ザンリュウ オウリョク コウバイ カイセキ ニ オケ
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Abstract
The distribution of residual stress near the surface of ground ceramics is very steep. In the X-ray stress measurements of specimens with large stress gradient, the sin2ψ diagram is nonlinear because of the change in X-ray penetration depth with X-ray tilt angle ψ. The stress measured by the X-ray method is a weighted average of the stresses over the X-ray penetration depth. However, the X-ray penetration depth has been taken rather arbitrary in the previous X-ray studies of steep stress distributions.<br>In the present study, a steep stress gradient was generated in bending of a thin plate of silicon nitride of thickness 108μm, and this applied stress was analyzed by the cosψ and parabola methods of X-ray measurement of stress gradient. The penetration depth is concluded to be infinite, and the range of the integral of the weighted average is from the surface of infinite depth. The thickness of about six times the effective penetration depth is enough to ensure the infinite range of integration. Several sources of errors in the measurement of stress gradient were discussed on the basis of numerical simulations.
Journal
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- Journal of the Society of Materials Science, Japan
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Journal of the Society of Materials Science, Japan 45 (7), 759-765, 1996
The Society of Materials Science, Japan
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Details 詳細情報について
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- CRID
- 1390001205391888768
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- NII Article ID
- 110002293083
- 40004857721
- 10003923887
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- NII Book ID
- AN10243287
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- ISSN
- 09164553
- 18807488
- 05145163
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed