Effect of Strain Aging on Fatigue Properties of Pre-Strained Carbon Steel.

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  • 予ひずみを受けた機械構造用炭素鋼の疲労特性に及ぼす時効の影響
  • ヨヒズミ オ ウケタ キカイ コウゾウヨウ タンソ コウ ノ ヒロウ トクセイ ニ オヨボス ジコウ ノ エイキョウ

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Fatigue test has been performed to investigate the effect of strain aging on fatigue properties of pre-strained carbon steel (S45C) using Ono-type rotary bending fatigue testing machine. Main results summarized in this study are as follows : (1) It is considered that both of the pre-strain and annealing condition influence the fatigue limit of pre-strained specimen. (2) Both the fatigue limit and hardness are increased by annealing. (3) Under the same annealing condition, the fatigue limit of pre-strained specimen increases with increase of pre-strain. (4) The optimal heat treatment temperature for obtaining the maximum value of fatigue limit decreases with increase of pre-strain.

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