Weibull Modulus of Cleavage Fracture Toughness of Ferritic Steels

被引：3
|
作者：
Lei, W-S [1 ]
Qian, G. [2 ]
Yu, Z. [1 ]
Zhang, P. [1 ]
机构：
[1] Shanghai Univ Engn Sci, Sch Mat Engn, 333 Long Teng Rd, Shanghai 201620, Peoples R China
[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2021年 / 52卷 / 04期
基金：
中国国家自然科学基金;
关键词：
GQ is grateful to the funding of National Natural Science Foundation of China (Grant Nos. 11872364; 11932020) and Chinese Academy of Science (CAS) Pioneer Hundred Talents Program;
D O I：
10.1007/s11661-021-06169-w
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The ordinary Weibull distribution function has been commonly accepted for empirical characterization of cleavage fracture toughness of nuclear reactor and containment pressure vessel steels. However, this method lacks a fundamental basis. This work adopts the standardized Weibull distribution function to analyze cleavage fracture toughness of ferritic steels measured from different sized fracture mechanics specimens at different temperatures to estimate the Weibull modulus. The toughness data of five different nuclear reactor and containment vessel steels are analyzed. The estimations obtained the Weibull modulus (m) in the range of 1.83 to 2.55 and strong temperature dependence of the threshold cleavage fracture toughness K-min, as opposed to the constant values of m(K) = 4 and K-min = 20 MPam(1/2) given in ASTM E1921-19. The goodness of fit test by the one-sample Kolmogorov-Smirnov (K-S) test validated Weibull distribution function for describing the toughness distribution.
引用
收藏
页码：1503 / 1515
页数：13
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