A5008082076- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Metal Forming Simulation Techniques
- High-Velocity Impact and Material Behavior
- Surface Treatment and Residual Stress
- Electromagnetic Launch and Propulsion Technology
- Metal and Thin Film Mechanics
- Electromagnetic Effects on Materials
- Ultrasonics and Acoustic Wave Propagation
- Energetic Materials and Combustion
- Superconducting Materials and Applications
- Mechanical Behavior of Composites
- Engineering Applied Research
- Tribology and Lubrication Engineering
- Laser-Plasma Interactions and Diagnostics
- Metal Alloys Wear and Properties
- Powder Metallurgy Techniques and Materials
- Geotechnical and Geomechanical Engineering
- Metallurgy and Material Forming
- Synthesis and properties of polymers
- Aluminum Alloys Composites Properties
- Thermal and Kinetic Analysis
- Pulsed Power Technology Applications
- Electronic Packaging and Soldering Technologies
- Laser and Thermal Forming Techniques
The Ohio State University
2008-2020
Modeling electromagnetic forming processes is in many ways simpler than modeling traditional metal processes. In the problem often dominated by inertial acceleration a magnetic field. This much better posed more ones that are complex three dimensional constitutive behavior and frictional effects. However, important aspects of properties material, performed regime where there little reliable material strength data. Strain rates high (10 2 to 10 4 s -1 typical range for forming). Also, heat...
Thin metal foil joining has wide applications in medical device and microelectronics. In this paper, laser impact welding was implemented to join aluminum titanium sheet. The velocity of Al flyer measured with photonic Doppler velocimetry. maximum reached up 1000 m/s within 0.2 μs. Varied thickness (25–250 μm) successfully welded Ti target. Weld strength peel test. area estimated resistance measurement method. effect spot size, thickness, standoff distance on weld strength, area,...
To understand the dynamic structural movements of very high power ultrasonic additive manufacturing, simultaneous in situ velocity measurements sonotrode, welding foil and substrate during consolidation were made using a photonic Doppler velocimeter. During which was successfully bonded to substrate, had similar vibration phase angles came into then out sonotrode; addition having large changes relative as normal force from sonotrode applied removed. A pass no bonding occurred, consisted...
Magnetic pulse welding can be considered as an advanced joining technique because it does not require any shielding atmosphere and input heat similar to conventional techniques. However, requires comprehensive evaluations for bonding dissimilar materials. In addition processing parameters, the surface preparation of components, such target material, needs evaluated. Different conditions were tested (machined, sand-blasted, polished, lubricated, chemically attacked, threaded) using a fixed...
The importance of well-developed constitutive models for predicting deformation behavior materials at high strain rates cannot be overstated. study and development these is pertinent to several fields, yet the test methods utilized probe this strain-rate realm are limited in both number standardization. In an effort augment current rate tests, new technologies have been leveraged revive old, under-utilized method – axisymmetric expanding ring. combination Photon Doppler Velocimetry (PDV) one...
A small press operated by electromagnetic repulsion and driven a pulse power supply was constructed at The Ohio State University. This design that applies kinetic energy rather than static force to do work on materials is much lighter potentially less expensive traditional hydraulic, mechanical or servo presses. Performance of the compared presses in applications powder compaction forming. results tend indicate modest impact speeds 3 18 m/s can improve performance these manufacturing...
Characterisation of materials under high strain rate is always challenging, and requires sophisticated apparatus. Magnetic pulse forming techniques can involve deformation the electromagnetic ring expansion test (ERET) considered here to determine its suitability characterise at rate. The multi-physics speed nature process advanced numerical modelling gain insight understanding stress development when used as a material characterisation technique. In order evaluate ERET fully behaviour rate,...
Impact spot welding implemented by the vaporizing foil actuator method has been studied. With significantly lower input energy levels as compared to resistance welding, similar and dissimilar lap of aluminium alloys (AA) types 5052 7075 was implemented. The welds between 2 mm thick AA5052 2.3 AA7075 were created with 4 kilojoules energy, whereas 1 sheets required only 0.6 kilojoules. Flyer sheet velocities approximately 750 m/s measured a PDV system. Microhardness measurements, performed...