Dynamic Fracture Toughness Measurements of High-Strength Steels Using Precracked Charpy Specimens

2009 ◽  
pp. 92-92-26 ◽  
Author(s):  
TJ Koppenaal
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
High Strength Steels ◽  
High Strength ◽  
Dynamic Fracture Toughness

scholarly journals Influence of Welding on Dynamic Fracture Toughness of Strenx 700MC Steel

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 494 ◽  
Author(s):  
Eva Schmidová ◽  
Fatih Bozkurt ◽  
Bohumil Culek ◽  
Sunil Kumar ◽  
Lenka Kuchariková ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Fracture Behavior ◽  
Microstructural Analysis ◽  
High Strength Steels ◽  
High Strength ◽  
Degradation Process ◽  
Structural Heterogeneity ◽  
Dynamic Fracture Toughness ◽  
Specific Fracture

Thermomechanically processed high-strength steels feature specific fracture behavior. One of the decisive criteria for their application is their stability against internal defects during impact loads, especially in connection with the welding. The work is focused on experimental analyses of the influence of welding on static and dynamic fracture toughness of Strenx 700MC steel. The fracture toughness was determined using the circumferentially notched round bar specimens during static loads and two dynamic load levels. To achieve a homogeneous zone for the requirements of fracture toughness tests, simulation of the welding influence was performed. Fractographic and metallographic analyses described a specific fracture behavior controlled by the internal structural heterogeneity. A limiting degradation process due to welding was identified by the microstructural analysis.

Dynamic Fracture Toughness of High-Strength 5KhN3МА Steel

2021 ◽  
Vol 2021 (9) ◽  
pp. 1051-1059
Author(s):  
L. R. Botvina ◽  
M. R. Tyutin ◽  
Yu. S. Perminova ◽  
A. V. Utkin
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
High Strength ◽  
Dynamic Fracture Toughness

Dynamic fracture toughness of a high strength armor steel

2009 ◽  
Vol 16 (8) ◽  
pp. 2567-2575 ◽  
Author(s):  
F. Gálvez ◽  
D. Cendón ◽  
N. García ◽  
A. Enfedaque ◽  
V. Sánchez-Gálvez
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
High Strength ◽  
Dynamic Fracture Toughness ◽  
Armor Steel

Effect of plastic deformation and H2S on dynamic fracture toughness of high strength casing steel

2015 ◽  
Vol 30 (2) ◽  
pp. 397-403 ◽  
Author(s):  
Dezhi Zeng ◽  
Naiyan Zhang ◽  
Gang Tian ◽  
Junying Hu ◽  
Zhi Zhang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Plastic Deformation ◽  
Dynamic Fracture ◽  
High Strength ◽  
Dynamic Fracture Toughness

Research on Mode I and Mode II Dynamic Fracture in High Strength Steels under High Loading Rates

2008 ◽  
Vol 33-37 ◽  
pp. 351-356 ◽  
Author(s):  
Ze Jian Xu ◽  
Yu Long Li ◽  
Masanori Kikuchi
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Loading Rate ◽  
Dynamic Stress Intensity Factor ◽  
High Strength Steels ◽  
High Strength ◽  
Mode I ◽  
Mode Ii ◽  
Transgranular Fracture ◽  
Loading Rates

The Mode I and Mode II dynamic fracture toughness (DFT) values, KId and KIId for high strength steels 40Cr and 30CrMnSiNi2A were evaluated using a combined experimental-numerical method. The tests were performed on three point bend (3PB) and shear specimens with Hopkinson pressure bar. The time of crack initiation was determined by a strain gauge. With the assistance of 3-D transient finite element analysis, the temporal evolution of the dynamic stress intensity factor under different loading rates was obtained, and the DFT was determined by the fracture initiation time. In Mode I tests, a brittle transgranular fracture was found in 40Cr, while evidence for ductile fracture was observed on the failure surface of 30CrMnSiNi2A. In Mode II tests, both tensile cracks and adiabatic shear bands were found for the two steels. The effect of ligament size on fracture toughness was discussed. The correlations of KId and KIId with loading rate were also investigated. The micromechanisms of loading rate effect on the DFT were discussed for both modes.

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