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Showing 1 to 13 of 13 for “"Charpy V-notch"”.
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A Numerical Investigation of Loading Rate Effects on Pre-Cracked Charpy V-Notch Specimens
To quantify the effects of loading rate on ductile crack growth in CVN specimens, plane strain, finite element analyses are used to model ductile crack extension in specimens subjected to quasi-static and impact loading. The Gurson-Tvergaard dilatant plasticity model for voided materials describes …
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Fracture Behavior Characterization of Conventional and High Performance Steel for Bridge Applications
… as part of this study. This includes both Charpy V-Notch testing, as well as more rigorous elastic-plastic fracture toughness testing. Analysis includes the application of the master curve methodology to statistically characterize fracture behavior in the ductile to brittle transition …
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Formation of Ti₃Al and its embrittling effects on titanium-aluminum alloys
… the Brown-type stress corrosion test and the Charpy V-notch Impact test. Segregated microstructures resulting from annealing in the (α+β) region were found to be extremely difficult to homogenize below the α-transus and could possibly explain the two-phase regions reported by many …
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Mechanical and microstructural properties of ultra-low carbon bainitic steel weld metal
… welding power and cover gas. The strength and Charpy V-notch toughness of the resulting welds was investigated. It was found that the GTA weld using 100% argon cover gas had excellent toughness (well above Navy requirements), but the strength was at the minimum specification. The GMA welds …
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Evaluating the Mechanical Properties and Fracture Behavior of Welded-Wire Reinforcement Using Tension and Charpy Tests and Sub-Size Charpy Corrections
… program was developed involving tensile and Charpy V-notch (CVN) specimens sampled from straight bars and welded intersections. Due to size constraints, both full and sub-size CVN specimens were tested and a variety of size correction methods were trialed for degree of accuracy in comparing …
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Role of alloy additions on strengthening in 17-4 PH stainless steel
… to 1310 MPa while decreased the room temperature charpy V notch (CVN) toughness from 20 J to four Joules. The addition of Co to cast 17-4 PH steel enhanced the yield strength and CVN toughness from 1140 MPa to 1290 MPa and from 3.7 J to 5.5 J, respectively. In the base 17-4 PH steel, an increase …
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The hardening of Type 316L stainless steel welds with thermal aging
… the evolution of hardness of the material, Charpy V-notch testing, to measure the evolution of toughness, and tensile testing. This thesis will focus on the variations in hardness with respect to aging time and location within the weld. Both a low ferrite series (FN=10) and a high ferrite …
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The effects of nitrogen and nickel on the microstructure and mechanical properties of 16 wt.% chromium stainless steels
… electron microscopy techniques. Tensile and Charpy V-notch impact tests were carried out on the alloys in their various heat treated conditions. Fracture surfaces, and deformation markings on the tensile gauge surface, were examined in the scanning electron microscope, while cross-sections of …
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Validation and application of the small sample punch test for toughness measurement of steels
… tensile test, fracture toughness test and the Charpy V-Notch (CVN) test were conducted on MACSTEEL VRN 500, a high hardness low alloy martensitic steel grade which was heat treated in order to demonstrate high, medium, and low fracture toughness properties. The results from these conventional …
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Quenching and partitioning plate steel for wear and toughness applications
… in each plate. When results of tensile testing, Charpy V-notch (CVN) impact testing, and Bond abrasion wear testing for each heat treated plate were compared, Q&P heat treated plates performed better than Q&T plates. The higher TQT 1-Step Q&P heat treated plates in particular demonstrated the …
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STANDARDS TO CONTROL FRACTURE IN STEEL BRIDGES THROUGH THE USE OF HIGH-TOUGHNESS STEEL AND RATIONAL INSPECTION INTERVALS
Non-redundant steel bridge systems have been used for major bridges in the United States since the late 1800’s. Designers recognized the inherent structural efficiency and economy associated with two-girder and truss systems. Unfortunately, early knowledge was limited regarding fatigue, fracture, …
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The effect of pre-strain on the fracture toughness of line pipe steel
… were also artificially strain aged. Tensile, notched tensile, fracture toughness (J-integral and crack tip opening displacement), and Charpy V-notch impact tests of virgin, pre-strained and strain aged material were conducted. The numerical study was based on the material and test specimen …
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An Active Study of a Roller Coaster Project in Asia.
<p>A roller coaster manufacturer became aware that improperly heat treated track couplings were sent to a construction site for assembly. Concerns were that suspect couplings might not meet the engineering specifications and could be vulnerable to sudden failure. A testing company in Oak Ridge, TN …