強靱鋼-IN鋼-の高速衝撃引張試験について

概要

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This paper describes the tensile impact properties of IN Steel which have been lately developed by the Ishikawajima-Harima Heavy Industries Co., Ltd., BY using a high speed impact tensile testing machine with a large rotary disk installed at Tokyo Institute of Technology, the authors have obtained some results from the experiment. The impact velocity was varied from static region to 80 m/s, and the test was performed at room temperature. The results obtained are summarized as follows : [1] Test results of the plain test pieces; (1) The impact tensile strength of IN Steel increased up to the impact velocity of 5m's and thereafter it was almost constant regardless of the impact velocity. (2) The maximum value of impact energy per unit volume of plain test pieces (d=8 mm, 1/d=5) was about 40 kg・m/cm^3 at the impact velocity of 40 m/s. (3) The observed critical impact velocity was about 50 m/s regardless of the gauge length of test pieces. (4) The contraction percentage of area decreased a little at the impact velocity of 5 m/s, and thereafter it was not affected much by the value of impact velocity. It was about 80 percent.
社団法人日本材料学会の論文
1964-02-15