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Showing 1 to 20 of 50 for “"Fatigue properties"”.
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Fatigue properties of rail steels
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1983.
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Fatigue properties of dissimilar metal laser welded lap joints.
… The work investigates both tensile and lap shear properties of similar and dissimilar metal laser welded butt and lap joints, with the majority of the investigation concentrating on the fatigue properties of dissimilar metal laser welded lap joints. The problems encountered when laser welding …
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The Cyclic Mechanical and Fatigue Properties of Ferroanelastic Beta-Prime Gold-Cadmium
Made available in DSpace on 2014-12-12T01:04:06Z (GMT). No. of bitstreams: 1 7317274.pdf: 3085940 bytes, checksum: 72a683d2b30401e5aad4c679e0ccdf9f (MD5) Previous issue date: 1972
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Investigation of Fatigue Properties of Superpave HMA at the Virginia Smart Road
This study investigated the influence of material properties on fatigue life through laboratory fatigue testing of eleven Superpave hot mix asphalt (HMA) mixtures in use at the Virginia Smart Road. Mixtures were sampled from the plant and produced in the laboratory to investigate the influence of …
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Effect of Porosity on the Elevated Temperature Fatigue Properties of Low-Alloy Steel Weldments.
… effect of porosity on the elevated temperature fatigue properties of low-alloy steel weldments. The material selected for investigation was ASTM A387-D, a 2-1/4 Cr - 1 Mo low-alloy steel commonly used in the fabrication of welded. structures which must perform at elevated temperature, such as …
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A micro-scale method to associate the fatigue properties of asphalt binder, mastic and mixture
The fatigue damage is one of the most common distresses observed on the asphalt concrete pavement. The initiation and propagation of the fatigue damage is a complicated phenomenon and very difficult to detect. In order to thoroughly understand the fatigue of asphalt concrete, the behaviors of the …
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Surface integrity evaluation and the effect of machining-induced surface integrity characteristics on part's performance
… process; it describes the influence of surface properties and characteristics upon material functional performance. As the leading-edge field of manufacturing research, SI finishing/machining and the consequent machining-induced complex combination of surface roughness, residual stress, …
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Development of a multiple-specimen, reversed-flexure fatigue tester and its application to the testing of titanium sheet
… consideration when designing structures is the fatigue resistance of available materials. The goals of this investigation were the development of a multiple-specimen fatigue tester and the evaluation of the fatigue properties of commercially pure titanium in a room-temperature air environment. …
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The microstructure and properties of hipped powder Ti alloys
… size, on the microstructure and mechanical properties of HIPped samples of two Ti alloys have been assessed. Powders of the most commonly used (α + β) alloy, Ti-6Al-4V and one specific beta alloy, Ti-25V-15Cr-2Al-0.2C wt% (burn resistant titanium alloy, BuRTi) were studied. The Ti-6Al-4V …
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Corrosion fatigue of 7005-T53 aluminum alloy
The process of corrosion fatigue involves mechanical and environmental influences that affect crack initiation, crack growth, and ultimately fatigue life. It is generally recognized that corrosion damage in the form of pits and the presence of humidity in the ambient environment have a deleterious …
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Mechanical and metallurgical properties of dissimilar metal joints using novel joining techniques
… explores the mechanical and metallurgical properties of dissimilar metal joining and determines a relationship between the fatigue properties and weld geometry. The research focuses on the relatively unexplored joining techniques of Laser Hybrid Welding and Cold Metal Transfer applied to …
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Quasi-Static Tensile and Fatigue Behavior of Extrusion Additive Manufactured ULTEM 9085
… In this study, quasi-static tensile and cyclic fatigue tests were performed on ULTEM 9085 samples fabricated by fused deposition modeling (FDM). First, tensile tests were conducted following ASTM D638 on three different build orientations with default build parameters to determine the mechanical …
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A model for the long-life fatigue behavior of small notches
… and intrinsic defects on the long-life regime fatigue properties was studied. A crack-closure-at-a-notch (termed CCN) model for predicting the fatigue life and fatigue threshold stress was developed based on the assumption that the da/dN vs. $\Delta$K$\sb{\rm eff}$ relation is a unique material …
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A statistical analysis of the fatigue behaviour of single and multi-spot welded joints.
… exist that can provide predictions for the fatigue properties of a spot welded joint based on geometric data. However, the accuracy of these models tends to diminish as the number of spot welds and complexity of the joint increases. This thesis reports on the findings of an investigative …
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Effect of high velocity oxy-fuel (HVOF) coatings on fatigue behaviour of carbon steel
… However, by taking consideration of mechanical properties and fatigue behaviour into cognisance, the consequence of the HVOF thermal spraying coating on the components remain debatable. In this research, the main objectives are to obtain the mechanical properties, investigate the fatigue …
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The microstructure and properties of powder HIPped nickel-based superalloy CM247LC
… as-HIPped specimens had the best tensile and HCF fatigue properties at both room temperature and 750 °C; the influence of post-HIP solution treatment conditions and of subsequent ageing on the properties of samples which had been HIPped at 1260 °C was thus investigated. A solution treatment at …
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A study of the feasibility of advanced hybrid thermoplastic composites for aerospace and automotive applications
… industries by virtue of their excellent specific properties, good corrosion resistance, toughness and fatigue properties. This study aimed at the feasibility of developing an advanced hybrid thermoplastic composite for aerospace and automotive applications. This was done by first researching the …
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Tensile, Creep, and Fatigue Behaviors of Thermoplastics Including Thickness, Mold Flow Direction, Mean Stress, Temperature, and Loading Rate Effects
… to evaluate and quantify the tensile, creep, and fatigue behaviors of two thermoplastic polymers. The effects considered in this experimental study include mold flow direction, thickness, mean stress, temperature, and loading rate. Specimens were subjected to monotonic tension, creep, and …
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Modeling the microstructure development in gray iron castings
… primary factors in determining the mechanical properties in cast metals. In this work, a representation of nucleation and growth kinetics for gray cast irons, based on a statistical description of the microstructure, has been coupled with a commercial finite element method code for transient …
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Fatigue mechanisms in FV520B, a turbine blade steel.
… the effect of microstructure on the mechanical properties of FV520B, a precipitation hardenable martensitic stainless steel. This high performance grade of stainless steel was heat treated to three commercially available material specifications, namely the peak hardened, standard and softened …
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