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RISAnalysis of the Heat-Affected Zone and Ablation Efficiency in Terms of Burst Mode Parameters During High Power Picosecond Laser Micromachining of Metals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a systematic study on using the burst mode ablation to limit the heat-affected zone (HAZ) while maintaining a high ablation efficiency using a high-power industrial picosecond laser with burst fluence ...
Dislocation Density Based Grain Refinement Modeling of Orthogonal Cutting of Titanium
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Recently, orthogonal cutting has been exploited as a means for producing ultrafine grained (UFG) and nanocrystalline microstructures for various metal materials, such as aluminum alloys, copper, stainless steel, titanium ...
Multiscale Finite Element Modeling of Alumina Ceramics Undergoing Laser-Assisted Machining
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Alumina ceramics, due to their excellent properties of high hardness, corrosion resistance, and low thermal expansion coefficient, are important industrial materials with a wide range of applications, but these materials ...
Robust Tool Wear Monitoring Using Systematic Feature Selection in Turning Processes With Consideration of Uncertainties
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper describes a robust tool wear monitoring scheme for turning processes using low-cost sensors. A feature normalization scheme is proposed to eliminate the dependence of signal features on cutting conditions, cutting ...
Investigation of the Machining Behavior of Ti6Al4V/TiC Composites During Conventional and Laser-Assisted Machining
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Conventional machining of Ti6Al4V/TiC composites is a very difficult process, which exhibits a peculiar cutting force pattern where the thrust forces are higher than the tangential forces. This behavior results in rapid ...
Self-Sufficient Modeling of Single Track Deposition of Ti–6Al–4V With the Prediction of Capture Efficiency
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Understanding the capture efficiency of powder during direct laser deposition (DLD) is critical when determining the overall manufacturing costs of additive manufacturing (AM) for comparison to traditional manufacturing ...
Investigation on Weld Pool Dynamics in Laser Welding of AISI 304 Stainless Steel With an Interface Gap Via a Three-Dimensional Dynamic Model and Experiments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper reports on numerical and experimental investigations involving examination of the effects of an interfacial gap in the range of 0–0.3 mm on keyhole and molten pool dynamics. A numerical model was developed to ...
Investigation of the Machining Behavior of Ti6Al4V/TiC Composites During Conventional and Laser-Assisted Machining
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Conventional machining of Ti6Al4V/TiC composites is a very difficult process, which exhibits a peculiar cutting force pattern where the thrust forces are higher than the tangential forces. This behavior results in rapid ...
Adaptive Robust Control of Circular Machining Contour Error Using Global Task Coordinate Frame
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The contour error (CE) of machining processes is defined as the difference between the desired and actual produced shape. Two major factors contributing to CE are axis position error and tool deflection. A large amount of ...
Modeling Particle Spray and Capture Efficiency for Direct Laser Deposition Using a Four Nozzle Powder Injection System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Powder capture efficiency is indicative of the amount of material that is added to the substrate during laser additive manufacturing (AM) processes, and thus, being able to predict capture efficiency provides capability ...