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

Hopkinson Bar Loaded Fracture Experimental Technique: A Critical Review of Dynamic Fracture Toughness Tests

2009 ◽  
Vol 62 (6) ◽  
Author(s):  
Fengchun Jiang ◽  
Kenneth S. Vecchio
Keyword(s):  
Fracture Toughness ◽  
Stress Wave ◽  
Dynamic Fracture ◽  
Fracture Behavior ◽  
Hopkinson Bar ◽  
Dynamic Fracture Toughness ◽  
Stress Wave Propagation ◽  
Theoretical Formula ◽  
Wave Loading ◽  
Engineering Materials

Hopkinson bar experimental techniques have been extensively employed to investigate the mechanical response and fracture behavior of engineering materials under high rate loading. Among these applications, the study of the dynamic fracture behavior of materials at stress-wave loading conditions (corresponding stress-intensity factor rate ∼106 MPam/s) has been an active research area in recent years. Various Hopkinson bar loading configurations and corresponding experimental methods have been proposed to date for measuring dynamic fracture toughness and investigating fracture mechanisms of engineering materials. In this paper, advances in Hopkinson bar loaded dynamic fracture techniques over the past 30 years, focused on dynamic fracture toughness measurement, are presented. Various aspects of Hopkinson bar fracture testing are reviewed, including (a) the analysis of advantages and disadvantages of loading systems and sample configurations; (b) a discussion of operating principles for determining dynamic load and sample displacement in different loading configurations; (c) a comparison of various methods used for determining dynamic fracture parameters (load, displacement, fracture time, and fracture toughness), such as theoretical formula, optical gauges, and strain gauges; and (d) an update of modeling and simulation of loading configurations. Fundamental issues associated with stress-wave loading, such as stress-wave propagation along the elastic bars and in the sample, stress-state equilibrium validation, incident pulse-shaping effect, and the “loss-of-contact” phenomenon are also addressed in this review.

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