-
Article
Uncertainty Estimation in Blast Vibration Attenuation Model Using Bayesian Probabilistic Approach
The drill and blast method is the most prominent rock excavation method used in mining and civil engineering projects. The ground vibration is the most undesirable effect of the blasting and needs to be contro...
-
Article
Surface tracking of diffusion bonding void closure and its application to titanium alloys
Diffusion bonding is a process by which two flat, usually metallic, surfaces are welded together at a high temperature and moderate pressure. Bonding occurs due to a combination of diffusion and power law cree...
-
Article
A Fractographic Analysis of Additively Manufactured Ti6Al4V by Electron Beam Melting: Effects of Powder Reuse
Metal additive manufacturing (AM) is being rapidly adopted in the aerospace and biomedical industries. Powder bed fusion AM processes are leading this trend. To maximize process economy, excess “unmelted” powd...
-
Article
Surface quality monitoring in abrasive water jet machining of Ti6Al4V–CFRP stacks through wavelet packet analysis of acoustic emission signals
Machining such as trimming and drilling of aerospace composite structures is often required to meet the intended geometric tolerances and functional requirements. Abrasive water jet (AWJ) is a primary candidat...
-
Chapter and Conference Paper
Effect of Heat Treatment on Friction Stir Welded Dissimilar Titanium Alloys
A significant drop in the hardness values have been achieved in the friction stir welded dissimilar titanium alloys after post weld heat treatment. A closer look at the microstructural evolution suggests that ...
-
Chapter and Conference Paper
Experimental Study of Mechanical Performance in Friction Stir Welded Dissimilar Titanium Alloys
Friction Stir Welding (FSW) is a solid state joining process widely used in aerospace industry for near net shape manufacturing. In the past, FSW has been well established with similar titanium alloys. The pro...
-
Article
Surface Residual Stresses in Ti-6Al-4V Friction Stir Welds: Pre- and Post-Thermal Stress Relief
The purpose of this study was to determine the residual stresses present in titanium friction stir welds and if a post-weld thermal stress relief cycle would be effective in minimizing those weld-induced resid...
-
Article
A study of the residual stress induced by shot peening for an isotropic material based on Prager’s yield criterion for combined stresses
Prager developed a yield criterion for a generalized isotropic material that is more capable of predicting material behavior that occurs from combined loading. A less studied topic is the effect of combined lo...
-
Article
Friction Stir-Welded Titanium Alloy Ti-6Al-4V: Microstructure, Mechanical and Fracture Properties
Friction stir welding (FSW) has been refined to create butt welds from two sheets of Ti-6Al-4V alloy to have an ultra-fine grain size. Weld specimen testing was completed for three different FSW process condit...
-
Article
Processing and fiber content effects on the machinability of compression moulded random direction short GFRP composites
The random direction short Glass Fiber Reinforced Plastics (GFRP) have been prepared by two compression moulding processes, namely the Preform and Sheet Moulding Compound (SMC) processes. Cutting force analysi...
-
Article
Effects on the Surface Texture, Superplastic Forming, and Fatigue Performance of Titanium 6AL-4V Friction Stir Welds
The speed and feed effects of the friction stir welding (FSW) process on the surface texture along the top of a butt welded nugget were studied. The tests were conducted using fine grain (0.8-2 μm) titanium al...
-
Article
Thinning Behavior Simulations in Superplastic Forming of Friction Stir Processed Titanium 6Al-4V
A study was undertaken to simulate the thinning behavior of titanium 6Al-4V alloy sheet during Superplastic Forming and to evaluate the feasibility of controlling thinning in areas of interest with Friction St...
-
Article
Simulation of Tensile Behavior in Friction Stir Welded and Superplastically Formed-Titanium 6Al-4V alloy
A hybrid numerical and experimental study was undertaken to evaluate the performance of friction stir welded (FSW) and superplastically formed friction stir welded (SPF-FSW) titanium joints. This paper present...
-
Article
Edge Finishing Effects on the Impact Behavior of Chopped GFRP Composites
The low velocity and low energy impact response of two common sheet mold compound (SMC) material systems—SMC-R27, and SMC-R37—were investigated. In addition to characterizing the low velocity impact response a...
-
Article
A Comparison of the Vibration Characteristics of Carbon Fiber Reinforced Plastic Plates with those of Magnesium Plates
An experimental and numerical investigation is conducted to evaluate vibration characteristics of an advanced composite material system, namely carbon fiber reinforced plastic (CFRP), relative to a magnesium a...
-
Article
Characterization of Superplastically Formed Friction Stir Weld in Titanium 6AL-4V: Preliminary Results
A collaborative University and Industry research project was undertaken to evaluate the performance of as friction stir welded (FSW) and friction stir welded and superplastically formed (FSW-SPF) titanium 6Al-...
-
Article
Post-Processing Effect on the Fatigue Behavior of Three Titanium Alloys under Simulated SPF Conditions
This experimental study investigates a post-Superplastic Forming (SPF) processing method with reduced material removal requirements and its effect on high-cycle fatigue behavior. Comprehensive high-cycle fatig...
-
Article
Experimental and Numerical Simulation of Tensile Behavior and Failure of Titanium Alloys Under Simulated SPF Post-Processing Conditions
Three titanium alloys were tested in tension after simulated SPF exposure to three different temperatures and subject to three different post-processing methods. This paper presents an experimental analysis an...
-
Article
Postprocessing effect on the ductility and flexural behavior of three titanium alloys under simulated superplastic forming conditions
Ductility of three titanium alloys was evaluated after exposure to time and temperature conditions representative of superplastic forming (SPF). Following exposure, flexural specimens were postprocessed to rem...
-
Article
Influence of grain size and microstructure on oxidation rates in titanium alloy Ti-6Al-4V under superplastic forming conditions
Ti-6Al-4V (Ti-6-4) sheets of two different grain sizes were exposed to time and temperature conditions representative of superplastic forming (SPF). The influence of SPF conditions on oxidation rates was evalu...
