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CCに関するtransniperのブックマーク (4)
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transniper 2011/12/22
- CC
リンク -
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金属の組織観察
鉄と炭素0.15%の合金，炭素鋼S15Cの顕微鏡組織写真です。試料をサンドペーパーで磨き，アルミナ研磨剤を用いバフ研磨で鏡面仕上げした後，3%硝酸アルコールで腐食させ，金属顕微鏡に一眼レフカメラを取り付け，ミニコピーフィルムで撮影。私にとって，フィルム現像，暗室で印画紙現像の手順で撮影した初めての写真です。博士課程1年、昭和45年(1970年)頃のものです。結晶粒の大きさが，疲労特性にどのように影響するかを調べた実験に用いました。材料の強度実験の場合，試験片が準備できると大方の実験は終わったと思うくらい，試験片の準備に時間がかかります。 A-Dの組織写真は，白い部分がフェライト結晶粒，黒い部分はパーライト組織で，拡大写真を右の写真に示します。白い部分は，炭素を0.02%しか含まない，比較的柔らかいフェライト組織，黒い部分は，鉄と炭素の化合物セメンタイトFe3Cで，強靱な強さを持っています。
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