改良ノッチ計装化シャルピーによる脆性破壊停止特性の評価

概要

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To utilize the advantage of Charpy impact test, a study was made of the empirical correlation between crack arrest test, such as DWTT and temperature gradient ESSO test, and instrumented Charpy test by a modified notch specimen. Main results were as follows. 1) Fracture initiation resistance was reduced in the order of the V-notch, the fatigue-notch, the fatigue-notch after embrittlement by an electron beam welding and the V-notch after embrittlement by the welding (EBV-notch). 2) The lowest temperature where 100% shear fracture occurred in the EBV-notch Charpy test (_<EBV>Trs=100) coincided with DWTT 85% SATT. 3) K_<ca> value deduced from instrumented Charpy test by EBV-notch specimen almost coincided with K_<ca> value obtained from temperature gradient ESSO test.
社団法人日本鉄鋼協会の論文
1977-02-01