On scattering of measured values of fracture toughness parameters

被引：16
作者：
Chen, JH [1 ]
Wang, GZ [1 ]
机构：
[1] Gansu Univ Technol, Lanzhou 730050, Gansu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FRACTURE | 1998年 / 94卷 / 01期
关键词：
fracture toughness; COD texts; scattering;
D O I：
10.1023/A:1007560230357
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The values of fracture toughness K-1C of C-Mn steels and weld metal were calculated from values of COD measured in standard specimens tested at low temperatures. The analysis of scattering of 42 values of K-1C measured in normalized C- Mn steel showed that the highest value of K-1C could be as large as 360 percent of the lowest. The factors affecting the scattering were investigated in detail and it was found that the scattering was mainly caused by the variation of locations of cleavage initiation. The local fracture stress sigma(f) was found to be the most stable parameter and combined with the minimum cleavage distance Xf min which is determined by the triaxiality of stress reaching a critical value, it could be used to characterize the lower boundary of fracture toughness of steels.
引用
收藏
页码：33 / 49
页数：17
相关论文
共 25 条
[1]   ON THE SCATTERING OF THE LOCAL FRACTURE-STRESS SIGMA-F-STAR [J].
CHEN, JH ;
ZHU, L ;
MA, H .
ACTA METALLURGICA ET MATERIALIA, 1990, 38 (12) :2527-2535
[2]   FURTHER STUDY ON THE MECHANISM OF CLEAVAGE FRACTURE AT LOW-TEMPERATURES [J].
CHEN, JH ;
YAN, C ;
SUN, J .
ACTA METALLURGICA ET MATERIALIA, 1994, 42 (01) :251-261
[3]   FRACTURE-BEHAVIOR OF C-MN STEEL AND WELD METAL IN NOTCHED AND PRECRACKED SPECIMENS .2. MICROMECHANISM OF FRACTURE [J].
CHEN, JH ;
WANG, GZ ;
MA, H .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (02) :321-330
[4]   FRACTURE-BEHAVIOR OF C-MN STEEL MULTIPASS MMA WELD METALS AT -60-DEGREES-C IN CHARPY-V TESTING [J].
CHEN, JH ;
YAN, C .
MATERIALS SCIENCE AND TECHNOLOGY, 1988, 4 (08) :732-739
[5]   A statistical model for cleavage fracture of low alloy steel [J].
Chen, JH ;
Wang, GZ ;
Wang, HJ .
ACTA MATERIALIA, 1996, 44 (10) :3979-3989
[6]   The local fracture stress as a fracture toughness parameter to characterize an heterogeneous weld zone [J].
Chen, JH ;
Hu, XJ ;
Wang, GZ .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 1996, 19 (06) :807-819
[7]   A COMPARISON OF TOUGHNESS OF C-MN STEEL WITH DIFFERENT GRAIN SIZES [J].
CHEN, JH ;
YAN, C .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1992, 23 (09) :2549-2556
[8]   FURTHER STUDY ON THE SCATTERING OF THE LOCAL FRACTURE-STRESS AND ALLIED TOUGHNESS VALUE [J].
CHEN, JH ;
WANG, GZ ;
WANG, Z ;
ZHU, L ;
GAO, YY .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (10) :2287-2296
[9]   STUDY OF MECHANISM OF CLEAVAGE FRACTURE AT LOW-TEMPERATURE [J].
CHEN, JH ;
WANG, GZ .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1992, 23 (02) :509-517
[10]  
Curry D. A., 1979, Metal Science, V13, P341
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