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The master curve methodology proposed by Kim Wallin (ASTM E1921-02) has been used to evaluate master curve reference temperature (T 0 ) from full compact tension (CT) and 1/2T-CT specimens for the material 20MnMoNi55 steel using single temperature and multi-temperature method. The effect of temperature range, number of test temperatures and initial crack length on the value of T 0 ...
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