衝撃引張荷重に対する S45C の衝撃特性(力学特性)

概要

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The authors developed a weight-dropping impact testing machine which evaluates the toughness of materials under tensile impact loading. The relation between the time t and load P is measured with the developed testing machine. The impact strength σ_<max>, is determined from the maximum load P_<max> ; impulse F_s from the time t and load P. Also, the "impulsivity T_<im>"-the ratio of the material impulse F_s to the standard impulse F_<ss> calculated by means of the maximum load P_<max>-is defined. A toughness evaluation method based on the relationship between the impact strength σ_<max> and the "impulsivity T_<im>" was reported in a previous paper. In this paper, heat treated S45C, well known for its static mechanical properties and Charpy impact value, is used as the specimen in the developed testing machine. It is confirmed that the developed testing machine is useful as a toughness evaluation method under tensile impact loading.
社団法人日本鉄鋼協会の論文
2001-11-01