Browsing by Subject "steel"
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Item Magnetic materials for high rotational velocity machines: a fresh look at an old problem(0000-00-00) Wilder, A.T.;The diameter and speed of rotors in electromagnetic machines are limited by materials. Machines having high tip-speed rotors demand materials performance in both magnetic and mechanical behaviors. As a result, soft magnetic materials are used both for energy conversion and for structural support. Unfortunately, desirable magnetic characteristics are linked to materials with inferior mechanical properties. Furthermore, a material’s magnetic characteristics change with temperature, mechanical stress, frequency, laminate thickness, etc., complicating direct comparison between materials candidates. Two new metrics for materials comparison under such multifactoral conditions are presented. A “next generation” category of magnetic materials is identified and some issues facing machine designers for the effective use of these materials are suggested.Item Simulated Effect of Laser Beam Quality on the Robustness of Laser-Based AM System(University of Texas at Austin, 2019) Flood, Aaron; Liou, FrankIn many metal AM techniques, a laser is used as the heat source and in some applications, it can be advantageous to work off of the focal plane. When operating outside of focus, the beam quality of the laser can have drastic impacts on the ability to manufacture quality parts. This study investigates the effect of the beam quality and distance from the focal plan on the ability to deposit Ti-64, aluminum, and steel through the simulation of the blown powder process.