Small crack growth behaviors of a polycrystalline Ni- based superalloy under temperature gradient creep condition
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- SUBRAMANIAN Rajivgandhi
- Department of Mechanical Engineering, Nagaoka University of Technology
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- METOKI Ayaka
- Department of Mechanical Engineering, Nagaoka University of Technology
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- ALEJANDRO Cavazos Villarreal
- Department of Mechanical Engineering, Nagaoka University of Technology
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- YAMAGISHI Satoshi
- Department of Mechanical Engineering, Nagaoka University of Technology
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- OKAZAKI Masakazu
- Department of Mechanical Engineering, Nagaoka University of Technology
説明
The crack growth behaviors of Ni-based superalloys were studied under thermal gradient creep condition (TGC) and compared with isothermal creep condition (ITC). Special attention was paid on getting basic understandings on small crack growth behavior around cooling holes in turbine blades. It was found that the cracks under the TGC showed higher crack growth rate than that under the ITC. Also a significant difference in growth rate was observed between the crack nucleated from cooling hole and the naturally initiated crack under the TGC conditions. These behaviors were analyzed in terms of creep J-integral, Jc; a time-dependent nonlinear fracture mechanics parameter. Some mechanistic background was discussed on the characteristic behaviors of the crack advance under the TGC condition.
収録刊行物
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- Mechanical Engineering Letters
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Mechanical Engineering Letters 1 (0), 15-00461-15-00461, 2015
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
- 1390282680741317504
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- NII論文ID
- 130005113421
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- ISSN
- 21895236
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可
