書誌事項
- タイトル別名
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- Development of <i>In Situ</i> FESEM Fatigue/Creep Experimental Technique for Freestanding Metallic Nano-Films
- ジリツ キンゾク ナノ ハクマク ノ ソノ バ デンカイ ホウシャ ソウサガタ デンシ ケンビキョウ カンサツ ヒロウ/クリープ キョウド シケンホウ ノ カイハツ
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<p>Experimental technique of in situ FESEM fatigue/creep experiments has been developed to investigate the mechanisms of fatigue/creep crack propagation in freestanding metallic nano-films. We developed an in situ FESEM fatigue/creep dual-mode testing machine which was able to conduct the fatigue or creep experiments inside the FESEM chamber. The testing machine has the capability to apply high-frequency cyclic load or constant load under load-control conditions to the freestanding metallic nano-film specimens. In situ FESEM observations of the fatigue crack propagation in 523-nm-thick freestanding copper (Cu) films confirmed that intrusions/extrusions were formed ahead of the fatigue crack tip in the lower stress intensity factor range (ΔK), and the size of the intrusions/extrusions increased as the number of stress cycles increased. The fatigue crack then propagated preferentially through these intrusions/extrusions. In the higher ΔK, the fatigue crack propagated in tensile fracture mode. In addition, in situ FESEM observations of the creep crack propagation in 391-nm-thick freestanding gold (Au) films confirmed that voids were formed ahead of the creep crack tip, and the crack then propagated by coalescence of the voids and the crack. These results indicate that this experimental technique is effective to clarify the mechanisms and mechanics of fatigue/creep crack propagation in freestanding nano-films.</p>
収録刊行物
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- 材料
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材料 65 (12), 869-876, 2016
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
- 1390001205444074752
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- NII論文ID
- 130005251201
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- NII書誌ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 027805288
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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
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可