鋼の引張特性とシャルピー式衝撃曲げ試験における荷重および遷移温度との関係について

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タイトル別名
  • The Relationship between the Transition Temperature and the Load in the Charpy Impact Test and the Tensile Properties of Steel
  • コウ ノ ヒッパリ トクセイ ト シャルピーシキ ショウゲキ マゲ シケン ニ オケル カジュウ オヨビ センイ オンド ト ノ カンケイ ニ ツイテ

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抄録

The purpose of this study is that the loads and the shapes of the load-time curves in the Charpy standard impact test are compared with the tensile strength data for the structural steel in three grained conditions (ASTM GS No. 4, 8 and 9). And three types of notched specimen were used in the Charpy impact test. The upper tensile yield stresses of these steels have been determined experimentally under three constant rates of stress, about 1, 102 and 107 kg/mm2sec, at temperatures of −196°C, −70°C and 16°C. A characteristic value σ0, i.e. the critical tensile strength divided by the plastic stress concentration factor, is easily obtained from the load-time curve in the Charpy impact test. The transition temperatures of steel in the Charpy impact test are predicted as the temperature at which the upper yield stress is equal to the value of σ0 obtained for the of stress rate at the root of notch. These predicted temperatures were found to agree remarkably well with the 15 ft-lb transition temperatures. The results of this study also provide that the Charpy impact test becomes more quantitative by observing the load-time curves, and may be used in place of the tensile test under high stress rate of about 106 kg/mm2sec.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 27 (9), 439-444, 1963

    公益社団法人 日本金属学会

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