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Letter

A Statistical Model of Cleavage Fracture Toughness of Ferritic Steel DIN 22NiMoCr37 at Different Temperatures

by
Guian Qian
1,
Wei-Sheng Lei
2,*,
Zhenfeng Tong
3,* and
Zhishui Yu
4
1
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2
Applied Materials, Inc., 974 East Arques Avenue, Sunnyvale, CA 94085, USA
3
China Institute of Atomic Energy, Beijing 102413, China
4
School of Materials Engineering, Shanghai University of Engineering Science, 333 Long Teng Rd., Shanghai 201620, China
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(6), 982; https://doi.org/10.3390/ma12060982
Submission received: 19 February 2019 / Revised: 16 March 2019 / Accepted: 18 March 2019 / Published: 25 March 2019
(This article belongs to the Section Advanced Materials Characterization)
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Abstract

It is a conventional practice to adopt Weibull statistics with a modulus of 4 for characterizing the statistical distribution of cleavage fracture toughness of ferritic steels, albeit based on a rather weak physical justification. In this study, a statistical model for cleavage fracture toughness of ferritic steels is proposed according to a new local approach model. The model suggests that there exists a unique correlation of the cumulative failure probability, fracture toughness and yield strength. This correlation is validated by the Euro fracture toughness dataset for 1CT specimens at four different temperatures, which deviates from the Weibull statistical model with a modulus of four.
Keywords: statistical model; ferritic steels; cleavage fracture toughness; master curve behavior statistical model; ferritic steels; cleavage fracture toughness; master curve behavior

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MDPI and ACS Style

Qian, G.; Lei, W.-S.; Tong, Z.; Yu, Z. A Statistical Model of Cleavage Fracture Toughness of Ferritic Steel DIN 22NiMoCr37 at Different Temperatures. Materials 2019, 12, 982. https://doi.org/10.3390/ma12060982

AMA Style

Qian G, Lei W-S, Tong Z, Yu Z. A Statistical Model of Cleavage Fracture Toughness of Ferritic Steel DIN 22NiMoCr37 at Different Temperatures. Materials. 2019; 12(6):982. https://doi.org/10.3390/ma12060982

Chicago/Turabian Style

Qian, Guian, Wei-Sheng Lei, Zhenfeng Tong, and Zhishui Yu. 2019. "A Statistical Model of Cleavage Fracture Toughness of Ferritic Steel DIN 22NiMoCr37 at Different Temperatures" Materials 12, no. 6: 982. https://doi.org/10.3390/ma12060982

APA Style

Qian, G., Lei, W.-S., Tong, Z., & Yu, Z. (2019). A Statistical Model of Cleavage Fracture Toughness of Ferritic Steel DIN 22NiMoCr37 at Different Temperatures. Materials, 12(6), 982. https://doi.org/10.3390/ma12060982

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