Application and comparative study of the master curve methodology for fracture toughness characterization of 20MnMoNi55 steel

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• 作者：S. Bhowmik^a ; P. Sahoo^a ; ^{psahoo@mech.jdvu.ac.in} ; ^{psjume@gmail.com} ; S.K. Acharyya^a ; J. Chattopadhyay^b ; S. Dhar^a
• 刊名：Materials and Design
• 出版年：2012
• 期刊代码：56_02613069
• 类别：ms
• 出版时间：August, 2012
• 卷：39
• 期：Complete
• 页码：309-317
• 文件大小：1413 K

摘要

The master curve methodology proposed by Kim Wallin (ASTM E1921-02) has been used to evaluate master curve reference temperature (T₀) 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 T₀ are also studied. The correction proposed for thickness adjustment has been verified. Master curves are drawn using full and 1/2T-CT specimen separately and compared with best fit characteristic curve and found to be within 95%bound.