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Keywords: melting
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Journal Articles
Article Type: Research-Article
J. Manuf. Sci. Eng. April 2013, 135(2): 021007.
Paper No: MANU-12-1004
Published Online: March 22, 2013
.... Assoc. Editor: Bin Wei. 02 01 2012 10 09 2012 Melting, vaporization, and resolidification in a gold thin film subject to multiple femtosecond laser pulses are numerically studied in the framework of the two-temperature model. The solid-liquid phase change is modeled using a kinetics...
Journal Articles
Article Type: Research Papers
J. Manuf. Sci. Eng. February 2012, 134(1): 011010.
Published Online: January 13, 2012
..., a considerably high temperature must have been reached in the regions near the punched hole. The aluminum in this region was assumed to have melted and resolidified. These assumptions were affirmed by the following observations. Microscopic-size precipitates present in the unaffected base metal microstructure...
Journal Articles
Article Type: Research Papers
J. Manuf. Sci. Eng. February 2012, 134(1): 011001.
Published Online: January 11, 2012
...P. S. Wei; C. L. Lin; H. J. Liu; C. N. Ting This study presents a numerical scenario for the effect of thermocapillary convection on the transient, two-dimensional molten pool shape during welding or melting. Tracing the melting process is necessary to achieve a better and more complete...
Journal Articles
Article Type: Technical Briefs
J. Manuf. Sci. Eng. February 2012, 134(1): 014501.
Published Online: January 11, 2012
.... Particularly at the weldline region, locally different orientation is observed near the part surface, which is the result of fountain flow at the melt front. Also the effect of mold temperature on the flake orientation is presented. Schematic representations of ( a ) flow and orientation kinematics...
Journal Articles
Article Type: Research Papers
J. Manuf. Sci. Eng. August 2010, 132(4): 041011.
Published Online: July 23, 2010
...S. Tsopanos; R. A. W. Mines; S. McKown; Y. Shen; W. J. Cantwell; W. Brooks; C. J. Sutcliffe The rapid manufacturing process of selective laser melting has been used to produce a series of stainless steel 316L microlattice structures. Laser power and laser exposure time are the two processing...
Journal Articles
Article Type: Research Papers
J. Manuf. Sci. Eng. June 2010, 132(3): 031001.
Published Online: April 28, 2010
... element methods, is used to determine the melting isotherms due to heat inputs on overlapping crater profiles. Then, a hemispherical-capped crater profile is estimated by applying a recast plasma flushing efficiency to the amount of molten material bounded by the melting isotherm. Finally, the recast...
Journal Articles
Article Type: Research Papers
J. Manuf. Sci. Eng. October 2009, 131(5): 051004.
Published Online: September 4, 2009
.... The cooling rates in the process and the spatial and temporal temperature profiles are numerically examined. The simulation results in conjunction with melting and crystallization kinetics of PLLA are used to understand the effect on sample crystallinity. The effects of laser fluence and annealing conditions...
Journal Articles
Article Type: Research Papers
J. Manuf. Sci. Eng. August 2009, 131(4): 041006.
Published Online: July 8, 2009
.... However, some craters would still exist on the machined surface, which limits the further improvement of the surface quality of the machined workpieces. One possible solution is to apply external forces to workpieces by using high-frequency vibrations to smooth craters during melting and solidification...
Journal Articles
Article Type: Research Papers
J. Manuf. Sci. Eng. June 2009, 131(3): 031013.
Published Online: May 28, 2009
... – 80   μ m seem to be smaller and more uniformly size distributed around 30 – 40   μ m . The formation of the top region is mainly associated with the thermal effects, i.e., rapid heating, melting, and ablation under HIPIB irradiation followed by ultrafast cooling or quenching. More...
Journal Articles
Article Type: Technical Briefs
J. Manuf. Sci. Eng. April 2009, 131(2): 024501.
Published Online: March 17, 2009
...Seungwon Shin; Haseung Chung In this paper, we present a one-dimensional (1D) melting, evaporating, and resolidifying model describing the interaction of a scanning laser beam with a metal surface wherein the continuous and stepwise heat flux is applied. One set of 1D conduction equations, which...
Journal Articles
Article Type: Technical Papers
J. Manuf. Sci. Eng. December 2007, 129(6): 991–999.
Published Online: June 9, 2007
... process, refereed to as double-electrode GMAW or DE-GMAW, thus has been developed to make it possible to increase the melting current while the base metal current can still be controlled at a desired level. This fundamental change provides an effective method to allow manufacturers to use high melting...
Journal Articles
Article Type: Technical Papers
J. Manuf. Sci. Eng. June 2007, 129(3): 575–582.
Published Online: December 18, 2006
...Tiebing Chen; Yuwen Zhang A three-dimensional model of selective laser sintering of a two-component loose metal powder layer on top of previously sintered layers by a single-line laser scanning is presented. A temperature-transforming model is employed to model melting and resolidification...
Journal Articles
Article Type: Technical Papers
J. Manuf. Sci. Eng. February 2005, 127(1): 148–156.
Published Online: March 21, 2005
... on steel substrates, by melting, e.g., preplated aluminum/nickel layers using a moving heat source such as a plasma arc. Such a source of Gaussian power distribution scans the surface of the coating, giving rise to the temperature evolution and component dissolution during the thermal melting and reaction...
Journal Articles
Article Type: Technical Papers
J. Manuf. Sci. Eng. May 2004, 126(2): 237–246.
Published Online: July 8, 2004
... a chamber, which is maintained at a temperature just below the melting point of the material being deposited. 1 Schematic of a liquefier in an FDM process Fused deposition modeling has become a widely used rapid prototyping technology. In the FDM utilized in this study (a Stratasys 1650...
Journal Articles
Article Type: Technical Papers
J. Manuf. Sci. Eng. May 2002, 124(2): 456–461.
Published Online: April 29, 2002
... . Manuscript received July 1999; Revised Aug. 2000. Associate Editor: S. G. Kapoor. 01 July 1999 01 Aug 2000 29 04 2002 furnaces virtual reality data visualisation melting aluminium industrial plants Designing a new manufacturing system often involves using numerical...
Journal Articles
Article Type: Technical Papers
J. Manuf. Sci. Eng. November 2001, 123(4): 632–638.
Published Online: May 1, 2000
... Manufacturing (SDM) process 11 12 . A welding-related deposition process used within SDM is termed microcasting and it involves depositing each layer as a sequence of discrete molten metal droplets. Droplets are formed by melting feedstock wire in a conventional gas metal arc welding torch. The droplets free...
Topics: Drops, Stress
Journal Articles
Article Type: Technical Papers
J. Manuf. Sci. Eng. November 2001, 123(4): 623–631.
Published Online: May 1, 2000
... processes melting stress analysis thermomechanical treatment drops 1 Schematics of the shape deposition manufacturing (SDM) process and the microcasting deposition process used within SDM A problem in understanding residual stress build-up in SFF processes is its complexity. SFF processes...
Journal Articles
Article Type: Technical Papers
J. Manuf. Sci. Eng. February 2001, 123(1): 38–44.
Published Online: December 1, 1999
...Franz-Josef Kahlen; Aravinda Kar This paper presents a set of process parameter selection rules to deposit a good metal part. A CO 2 laser is used to melt metal powder to achieve layer by layer deposition for fabricating three-dimensional parts. Dimensionless numbers characterizing this powder...