書誌事項
- タイトル別名
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- Initiation and Growth Behavior of Small Fatigue Cracks in Ultra-fine Grained P/M Aluminum Alloy at Elevated Temperatures
- チョウビサイ ケッショウリュウ P M アルミニウム ゴウキン ノ チュウコウオンイキ ニ オケル ビショウ ヒロウ キレツ ハッセイ オヨビ ショキ シンテン キョドウ
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説明
Small fatigue crack initiation and growth behavior at elevated temperatures were investigated using ultra-fine grained P/M (Powder Metallurgy) aluminum alloy of which grain size was from 200 to 500nm. Reversed plane bending fatigue tests were conducted at three different temperatures of room temperature (R.T.), 200°C (473K) and 250°C (523K), and crack initiation and small crack growth were studied in detail by means of replication technique. The fatigue strength decreased as test temperature increased. The cracks initiated at the boundary between powders regardless of test temperatures, and total fatigue life was dominated by crack initiation life. The fatigue crack initiation and growth behavior was almost irrelevant to the test temperatures. Fatigue crack growth rates, da/dn, were slightly accelerated at a fixed Kmax with increasing test temperature, while da/dn evaluated in terms of Kmax/E (E : Elastic modulus) agreed well. The dependence of fatigue strength and crack growth rate on test temperature was much smaller than that of conventional aluminum alloys, indicating the high heat resistance of ultra-fine grained P/M aluminum alloy.
収録刊行物
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- 材料
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材料 55 (6), 545-549, 2006
公益社団法人 日本材料学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390001205418735872
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- NII論文ID
- 120006340001
- 110006570960
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- NII書誌ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- HANDLE
- 20.500.12099/24120
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- NDL書誌ID
- 7997265
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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
- IRDB
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可
