منابع مشابه
Evaluating Wear Properties of AISI 420 Martensitic Stainless Steel after Laser Transformation Hardening
As the turbine industries need to manufacture turbine blades made of martensitic stainless steel AISI 420 with high toughness and wear resistance, local laser hardening has become more and more important. In this research, surface of the samples was initially hardened by high-power pulsed laser beam; then, optimum parameters of hardening were calculated and wear resistance of surface hardened s...
متن کاملOn the Optimal Control Problem of Laser Surface Hardening
We discuss an optimal control problem of laser surface hardening of steel which is governed by a dynamical system consisting of a semilinear parabolic equation and an ordinary differential equation with a non differentiable right hand side function f+. To avoid the numerical and analytic difficulties posed by f+, it is regularized using a monotone Heaviside function and the regularized problem ...
متن کاملExperimental Studies on the Microstructure and Hardness of Laser Transformation Hardening of Low Alloy Steel
An experimental investigation with Nd:YAG laser system was carried out to study the effects of laser hardening process parameters on the microstructure and hardness during laser hardening of EN25 steel. The laser beam is allowed to scan on the surface of the work piece by varying the laser beam power (750–1250 W) and travel speed (500–1000 mm/min) of the work table. The microstructural features...
متن کاملOptimal control of laser hardening
We present a mathematical model for the laser surface hardening of steel. It consists of a nonlinear heat equation coupled with a system of ve ordinary diierential equations to describe the volume fractions of the occuring phases. Existence, regularity and stability results are discussed. Since the resulting hardness can be estimated by the volume fraction of martens-ite, we formulate the probl...
متن کاملSurface Characterization of Polycarbonate Parts from Selective Laser Sintering
Selective Laser Sintering Irem Y. Tumer David C. Thompson Graduate Research Asst. Graduate Research Asst. Richard H. Crawford Kristin L. Wood Assistant Professor Associate Professor Mechanical Engineering Department The University of Texas at Austin Abstract Surfaces of polycarbonate Selective Laser Sintering parts are investigated to determine the characteristics a ecting part quality. Surface...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2021
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/1822/1/012007