Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Печать: 1093-3611
ISSN Онлайн: 1940-4360

Выпуски:
Том 24, 2020 Том 23, 2019 Том 22, 2018 Том 21, 2017 Том 20, 2016 Том 19, 2015 Том 18, 2014 Том 17, 2013 Том 16, 2012 Том 15, 2011 Том 14, 2010 Том 13, 2009 Том 12, 2008 Том 11, 2007 Том 10, 2006 Том 9, 2005 Том 8, 2004 Том 7, 2003 Том 6, 2002 Том 5, 2001 Том 4, 2000 Том 3, 1999 Том 2, 1998 Том 1, 1997

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v4.i2.20
40 pages

Thermal and dimensional characteristics of vapor-plasma plume and layer deposition in laser-aided rapid manufacturing

Franz-Josef Kahlen
School of Optics and Center for Research and Education in Optics and Lasers, Department of Mechanical, Materials and Aerospace Engineering, The University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816-2700
Aravinda Kar
School of Optics and Center for Research and Education in Optics and Lasers, Department of Mechanical, Materials and Aerospace Engineering, The University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816-2700

Краткое описание

Three-dimensional structures of copper, Ti-6Al-4V, aluminum, and stainless steel 304 were fabricated by melting the powders of these materials with a CO2 laser beam. A vapor-plasma plume is generated at the top of the melt layer. The emission spectra of the plume were recorded using an optical multichannel analyzer, and the plume temperatures are determined to be in the range of 4920 K to 6720 K. A one-dimensional model is developed to calculate the plume temperature, process parameters and melt pool characteristics. The model accounts for the transmission of the laser beam through the plume, energy transfer in the molten phase and the Stefan conditions at the solid-liquid and liquid-vapor interfaces. The surface temperature at the molten surface is found to exceed the normal boiling temperature causing the pressure to be higher than one atmospheric pressure. The calculated plume temperatures are in good agreement with the values obtained from the spectral data. Also, the model predictions for remelt layer depth, deposition height and plasma height compare well with experimental data.


Articles with similar content:

RECOMBINATION AND DIFFUSION IN AN INDUCTIVELY COUPLED ARGON PLASMA DURING POWER INTERRUPTION
Progress in Plasma Processing of Materials, 1997, Vol.1, 1997, issue
J. Jonkers, F. P. J. de Groote, Joost J. A. M. van der Mullen, J. M. de Regt
SURFACE TEMPERATURES IN ELECTRON BEAM WELDING CAVITIES
International Heat Transfer Conference 6, Vol.4, 1978, issue
Dale A. Schauer, S. M. Shintaku , H. Giedt
ON THE OXIDATION OF Ni-23Co-17Cr-12AI-0.5Y-ALLOY SERVING AS BOND COAT IN THERMAL BARRIER COATINGS
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.4, 2000, issue 3
Reidar Haugsrud, Erick Lugscheider, Ingard Kvernes
IN-FLIGHT MEASUREMENT OF PARTICLE SIZE AND VELOCITY IN A RADIO FREQUENCY PLASMA TORCH
Progress in Plasma Processing of Materials, 1999, Vol.1, 1999, issue
S. Nguyen-Kuok, Jacques Amouroux, F. Krayem, Sergey V. Dresvin, Daniel Morvan, E. Francke
SOLUTE AND THERMAL REDISTRIBUTION DURING FREEZING OF SALT SOLUTIONS
International Heat Transfer Conference 5, Vol.2, 1974, issue
W. H. Stevenson , B. W. Grange, Raymond Viskanta