書誌事項
- タイトル別名
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- Creep Degradation for Austenitic Stainless steel in KA-SUS304J1HTB
- オーステナイトケイ ステンレスコウ カ SUS304J1HTB ノ クリープ レッカ
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説明
<p>The microstructures of the KA-SUS304J1HTB (ASME code: 2328) were investigated in order to clarify the reason for the onset of accelerating creep. Creep tests were conducted at 873 K for a stress range from 240 MPa to 300 MPa. Creep interrupted tests were also conducted at 873 K for a stress of 240 MPa. Creep deformation of the KA-SUS304J1HTB was divided into the following three regions: transient creep, minimum creep and accelerating creep. The creep life of the KA-SUS304J1HTB consisted mostly of accelerating creep, regardless of the stress conditions. The creep cracks initiated along the grain boundary due to accelerating creep and the number and length of the creep cracks increased in accordance with the creep time. In addition, the results of microstructure observations conducted using the electron channeling contrast image (ECCI) method indicated that dynamic recovery and sub-grain formation around the grain boundaries occurred during the accelerating creep region. On the other hand, dynamic recovery in the grain did not occur under this condition. Increments in the grain orientation spread (GOS) produced by creep were almost the same as those produced by high temperature tensile deformation, although the deformation mode was different. The values calculated using the GOS increased with the strain increasing linearly. However, the large misorientation area calculated by kernel average misorientation (KAM) was only localized near the grain boundaries under the creep condition.</p>
収録刊行物
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- 材料
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材料 66 (2), 179-184, 2017
公益社団法人 日本材料学会
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詳細情報 詳細情報について
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- CRID
- 1390001205443984000
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- NII論文ID
- 130005240474
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- NII書誌ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 027994784
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- 本文言語コード
- ja
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- JaLC
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