書誌事項
- タイトル別名
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- Fabrication Method of the Micro-Sized Tensile Specimen for Inspecting Size Effects by Electrolytic Polishing Technique
- デンカイ ケンマ ニ ヨル ビショウ サイズ ヒッパリ シケンヘン サクセイホウ ノ カイハツ
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The ratio of surface area to volume increases as a material gets smaller. For this reason, the mechanical properties of a micro-sized material are strongly influenced by the surface conditions. To accurately study how the mechanical properties are influenced by the size, we need to test specimens with negligible work-affected layers. However, conventional microfabrication methods are poorly suited for the manufacture of specimens that meet this condition. In order to overcome these problems, we developed a novel method for manufacturing micro-sized tensile specimens with negligible work-affected layers using a precision electrolytic polishing apparatus. A polycrystalline austenitic stainless steel (SUS304) wire with a diameter of 0.5 mm was selected as the material for study. The sample wire (anode) was vertically set at the center of a ring-shaped counter electrode and gripped by a collet chuck. Once the sample was set, a rectangular wave voltage for electrolytic polishing was applied in a flowing electrolytic solution. The apparatus was used to manufacture a tensile specimen with a diameter of 51 μm, i.e., a diameter smaller than the average grain size of the sample. Optical, laser, and scanning electron microscope observations revealed a smooth and mirrored specimen surface. Tensile testing of the specimen by a testing machine for micro-sized materials revealed a clear yield point on a stress-displacement curve. The yield and fracture strength of the specimen were 100 and 180 MPa, respectively, or about the same as those of a single crystal. The specimen deformation observed by scanning electron microscope mainly occurred at single crystal regions placed between grain boundaries.<br>
収録刊行物
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- 日本金属学会誌
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日本金属学会誌 71 (2), 170-175, 2007
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282681454842496
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- NII論文ID
- 10018509111
- 130004455808
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- NII書誌ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL書誌ID
- 8676918
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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
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- 使用不可