書誌事項
- タイトル別名
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- Molecular Dynamics Analysis on the Crystallographic Orientation Dependence of the Acceleration of Intergranular Cracking at Elevated Temperatures
抄録
<p>To suppress climate change, thermal power generation must operate under random output change at elevated temperatures for compensating the unstable output of renewable energies. Creep-fatigue damage of heat-resistant alloys has been found to increase and accelerate intergranular cracking, resulting in the drastic decrease of their lifetime. Creep-fatigue damage is known to degrade the crystallinity around grain boundary and thus, the strength of grain boundaries drastically. In order to clarify the degradation mechanism, molecular dynamics was applied to the deformation and fracture behaviors of bicrystal structures. It was found that the local energy concentration near the grain boundary activated the outward diffusion of atom around the grain boundaries and caused grooving at the edge of the grain boundaries due to the lattice mismatch between the facing grains and the mismatch of elastic constant (Young’s modulus). The drastic decrease in the local potential energy around the grain boundaries due to the strain energy caused by those mismatches was the main reason for the acceleration of the degradation,</p>
収録刊行物
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- 計算力学講演会講演論文集
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計算力学講演会講演論文集 2022.35 (0), 11-05-, 2022
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390577685334715136
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- ISSN
- 24242799
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
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- 抄録ライセンスフラグ
- 使用不可