期刊
VACUUM
卷 142, 期 -, 页码 114-122出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2017.04.039
关键词
Electron beam melting; Stainless steel; Energy absorption; Heat transfer; In-situ thermocouples; CASINO
资金
- Natural Sciences and Engineering Research Council of Canada [CRDPJ 469597-14, NSERC EQPEQ 440202-13]
- Canadian Foundation for Innovation [8246]
The absorption coefficient during pulsed, conduction-mode electron beam spot melting of 304 stainless steel was measured at different combinations of accelerating voltage [60,80] kV, beam current [10,15,20] mA, pulse length [0.6-12] mS and beam inclination angle [0, 15, 35, 55, 65]. Ignoring evaporative and radiative heat loss, the absorption coefficient was determined directly by fitting in-situ thermocouple measurements to an analytical function, with an average adjusted R-square fit parameter of 0.9996 over the 103 measurements. The absorption coefficient was found to be insensitive to both beam current and accelerating voltage, but decreased with increasing inclination angle. Measurements are compared to estimates generated from Monte-Carlo electron trajectory simulations using the CASINO software, with good agreement for all process parameter combinations, experimentally demonstrating the capability of Monte-Carlo methods to estimate local electron beam heat transfer. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据