Fatigue Strength in Nanocrystalline Ti- and Cu-Based Bulk Metallic Glasses
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- Fujita Kazutaka
- Department of Mechanical Engineering, Ube National Collge of Technology
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- Hashimoto Tetsuro
- Advanced Production System Engineering Course, Ube National College of Terchnology
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- Zhang Wei
- Institute for Materials Research, Tohoku University
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- Nishiyama Nobuyuki
- RIMCOF, Tohoku University Laboratory
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- Ma Chaoli
- School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics
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- Kimura Hisamichi
- Institute for Materials Research, Tohoku University
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- Inoue Akihisa
- Institute for Materials Research, Tohoku University
Bibliographic Information
- Other Title
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- Ti 基および Cu 基ナノ結晶分散型バルク金属ガラスの疲労強度
- Tiキ オヨビ Cuキ ナノ ケッショウ ブンサンガタ バルク キンゾク ガラス ノ ヒロウ キョウド
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Abstract
Fatigue tests were carried out on nanocrystalline Ti- and Cu-based bulk metallic glasses (BMGs) for which there are still no reports on fatigue strength. Test alloy rods with a diameter of 2 mm were prepared in nanocrystalline Ti41.5Zr2.5Hf5Cu42.5Ni7.5Si1 at% and Cu60Zr30Ti10 at% systems by copper mold casting. Nanocrystals were dispersed in the metallic glassy phase in both BMGs. The tensile strength (σB) in the nanocrystalline Ti- and Cu-based BMGs were 2.04 GPa and 2.00 GPa, and Young' s modulus were 95 GPa and 114 GPa, respectively. The test specimens were machined to hourglass shape type (the radius in axial direction; 4.45 mm, the minimum diameter; 0.9 mm), and after machining the specimen surfaces were electropolished by 50~100 μm. The specimens were tested at a stress ratio of 0.1 and a frequency of 5-8 Hz. The fatigue limit (σw) (half a total stress amplitude) and fatigue ratio (σw/σB) in the nanocrystalline Ti- and Cu-based BMGs showed very large values (Ti-based alloy; 806 MPa and 0.40, Cu-based alloy; 490 MPa and 0.25). This experimental result indicated a possibility that the nanocrystal dispersed BMGs have higher fatigue strength than the high strength crystalline alloys with high fatigue strength (e.g. Cr-Mo steel, σw≈500 MPa).<br>
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 70 (10), 816-823, 2006
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390001206480534784
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- NII Article ID
- 10018310722
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- NII Book ID
- AN00187860
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- COI
- 1:CAS:528:DC%2BD28Xht1Ogsb7N
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 8550668
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed