Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Estimation of Kca Value of Brittle Crack Arrest from Instrumented Charpy Test by a Modified Notch Specimen
Shoichi MATSUDAShoichi SEKIGUCHI
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1977 Volume 63 Issue 2 Pages 313-320

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Abstract

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 (EBVTrs=100) coincided with DWTT 85% SATT.
3) Kca value deduced from instrumented Charpy test by EBV-notch specimen almost coincided with Kca value obtained from temperature gradient ESSO test.

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© The Iron and Steel Institute of Japan
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