延性き裂発生ひずみに及ぼす冷間塑性加工の影響

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書誌事項

タイトル別名
  • EFFECTS OF COLD-WORKING ON THE CRITICAL STRAIN OF FIBROUS CRACK INITIATION
  • エンセイ キレツ ハッセイ ヒズミ ニ オヨボス レイカン ソセイ カコウ ノ

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説明

Monotonic tension test was performed to find the fibrous crack initiation strain at notches under general yielding condition. The specimens are round bars having a circumferential notch at the center, which were produced from a virgin SM 490 steel plate and its cold-worked plate by giving tensile 10 % -prestrain under atmospheric temperature. It was found that the strain at the onset of fibrous crack can be safely estimated to be the uniform strain of the material. The cold-working significantly reduced the uniform strain of the virgin steel, and thus the fibrous crack initiation strain was markedly reduced in such prestrained steel.

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