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07466 Stress and Adhesion of Protective Oxide Scales on a Stainless Steel

Picture for 07466 Stress and Adhesion of Protective Oxide Scales on a Stainless Steel
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Product Number: 51300-07466-SG
ISBN: 07466 2007 CP
Author: Kazuyuki Kitamura, Yoshitaka Nishiyama, Nobuo Otsuka, and Takeo Kudo
Publication Date: 2007
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In-situ acoustic emission (AE) and Raman measurements, focusing on the adhesion of a protective oxide scale, were conducted to clarify the breakaway behavior under cyclic condition. The AE measurement showed that the scale failure such as spalling and/or cracking occurred even after one cycle of 3 hr heating at 1173 °K. It was also clarified that the scale stress without the creep-deformation and spalling corresponded to calculated thermal stress. The critical adhesion force of the scale on 25Cr- 20Ni steel heated for 3 hr at 1173 °K was estimated to be 1.7± 0.2 GPa in the range of 573 °K (-?T =600 °K) to the room temperature. Cyclic heating accelerated the spalling of the oxide scale, resulting in gradual degradation of protective oxide scale. These processes have induced breakaway oxidation of austenitic stainless steel.
In-situ acoustic emission (AE) and Raman measurements, focusing on the adhesion of a protective oxide scale, were conducted to clarify the breakaway behavior under cyclic condition. The AE measurement showed that the scale failure such as spalling and/or cracking occurred even after one cycle of 3 hr heating at 1173 °K. It was also clarified that the scale stress without the creep-deformation and spalling corresponded to calculated thermal stress. The critical adhesion force of the scale on 25Cr- 20Ni steel heated for 3 hr at 1173 °K was estimated to be 1.7± 0.2 GPa in the range of 573 °K (-?T =600 °K) to the room temperature. Cyclic heating accelerated the spalling of the oxide scale, resulting in gradual degradation of protective oxide scale. These processes have induced breakaway oxidation of austenitic stainless steel.
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