نتایج جستجو برای: laser surface melting

تعداد نتایج: 820690  

Journal: :Laser Technik Journal 2012

2014
Yong Seok Hwang Valery I. Levitas

Articles you may be interested in Phase field simulation of kinetic superheating and melting of aluminum nanolayer irradiated by pico-and femtosecond laser Appl. Highly localized heat generation by femtosecond laser induced plasmon excitation in Ag nanowires Appl. Origin of temperature plateaus in laser-heated diamond anvil cell experiments Ultrafast melting and resolidification of gold particl...

The aim of the present study is to investigate the mechanical and microstructural properties of 1.7225 steel in laser welding process using Nd:YAG pulsed laser device and then to determine the optimal focal length relative to the part in the welding area. After welding, microstructural characterization, microhardness and tensile tests were performed. Evaluations showed that the optimal focal le...

Journal: :Nanomaterials 2021

We report on the fabrication of fractal dendrites using laser-induced melting aluminum alloys. target boron carbide (B4C), which is one most effective radiation-absorbing materials characterized by a low coefficient thermal expansion. Due to high fragility B4C crystals, we were able introduce its nanoparticles into stabilization matrix AA385.0. The high-intensity laser field action led formatio...

2018
Gerrit M. Ter Haar Thorsten H. Becker

Current post-process heat treatments applied to selective laser melting produced Ti-6Al-4V do not achieve the same microstructure and therefore superior tensile behaviour of thermomechanical processed wrought Ti-6Al-4V. Due to the growing demand for selective laser melting produced parts in industry, research and development towards improved mechanical properties is ongoing. This study is aimed...

2013
Artur Medvid Pavels Onufrijevs Renata Jarimaviciute-Gudaitiene Edvins Dauksta Igoris Prosycevas

In this work we study the mechanisms of laser radiation interaction with elementary semiconductors such as Si and Ge and their solid solution SiGe. As a result of this investigation, the mechanisms of nanocones and microcones formation on a surface of semiconductor were proposed. We have shown the possibility to control the size and the shape of cones both by the laser. The main reason for the ...

Journal: :journal of lasers in medical sciences 0
deise osmari federal university of santa maria (ufsm), santa maria, rs, brazil. ana carolina de oliveira ferreira federal university of santa maria (ufsm), santa maria, rs, brazil. mariana de carlo bello federal university of santa maria (ufsm), santa maria, rs, brazil. alexandre henrique susin department of dentistry, federal university of santa maria (ufsm), santa maria, rs, brazil ana cecília correia aranha department of dentistry at the college of dentistry of são paulo, university of são paulo (usp), são paulo, sp, brazil. marcela marquezan federal university of santa maria (ufsm), santa maria, rs, brazil.

introduction: the purpose of a desensitizing agent is a permanent coating or filling of dentin surface. morphological analysis in vitro of this treated surface is essential to understand the interaction between desensitizing agent and hypersensitive dentin. the aim was to evaluate the morphology of four dentin surface treated with desensitizing agents. methods: this was an in vitro laboratory s...

AA Rostami C. P. Grigoropoulos,

The rapid melting of silicon film due to the absorption of a CW laser beam radiation is studied. The silicon film melting and recrystallization is mainly controlled by the temperature distribution in the semiconductor. The enthalpy technique for the solution of phase change problems is used in an explicit finite difference form to calculate the transient temperature distribution in the silicon ...

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