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melt pool temperature

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Published: 15 June 2020
Fig. 10 Experimental temperature profile of melt pool shows plateau corresponding to liquid-solid transition. Source: Ref 18 More
Image
Published: 12 September 2022
Fig. 9 Shape prediction of melt pool in a titanium alloy by temperature-distribution simulation, and product shape optimization prediction when scanning speed is used as a variable. Forward simulation and inverse problem analysis are important tools to eliminate the need for trial and error More
Image
Published: 30 June 2023
Fig. 9 (a) Melt pool obtained by pyrometry, with temperature scale in Kelvin. (b) Heat-affected zone temperature (uncalibrated) along a thin wall, obtained by infrared imaging within the chamber for laser directed-energy deposition with powder feedstock More
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006994
EISBN: 978-1-62708-439-0
... in powder-bed fusion and directed energy deposition processes. In the latter case, closed-loop feedback is used to control melt pool temperature and cooling rate in order to achieve desired microstructure. closed-loop control data-driven optimization directed energy deposition melt pool temperature...
Image
Published: 15 June 2020
Fig. 9 Two successive frames from a video of the melting period show tracking of the melt pool. Temperature is in Kelvin. Reprinted from Ref 17 , https://doi.org/10.1016/j.addma.2018.06.004 , under a Creative Commons license, https://creativecommons.org/licenses/by/4.0/ More
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006564
EISBN: 978-1-62708-290-7
... monitoring include optical and thermal methods that monitor light reflected or emitted in the visible and infrared wavelengths, respectively. Monitoring methods for laser directed-energy deposition (DED) discussed are those that measure the size and shape of the melt pool, the temperature of the melt pool...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005513
EISBN: 978-1-62708-197-9
... is at ambient temperature. The substrate temperature rises as material continues to be deposited. This increase in temperature depends on the thickness and heat capacity of the substrate material. For a thin substrate, if the beam energy is kept constant, the melt pool size can increase progressively...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006986
EISBN: 978-1-62708-439-0
... to complete the entire part. Lumped-Parameter Model for Melt Pool Dynamics Doumanidis and Kwak ( Ref 1 ) characterized the dynamics of melt pool geometry and temperature with respect to process parameters in arc welding, based on the principles of mass, momentum, and energy balances of the molten...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006954
EISBN: 978-1-62708-439-0
... reflect the views or policies of NIST or the U.S. government. Melt Pools—Size, Scale, and Temperatures The design of a measurement system may seem like a chicken-or-egg problem, in that one must know something about a measurement before designing the measurement system or interpreting results from...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006972
EISBN: 978-1-62708-439-0
... the current track to previous, surrounding tracks/layers. The heat penetration is typically characterized by the size and magnitude of the heat-affected zone (HAZ), which is the elevated-temperature field surrounding the melt pool. The LOF defects are observed as regions of reduced density between layers...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001482
EISBN: 978-1-62708-173-3
... pool, and vaporization heat loss will lead to significant error in the melt pool prediction. Therefore, the only reasonable strategy for validation of such an analytical model will be temperature measurement at the HAZ, preferably away from the liquid-solid interface. In designing experiments...
Image
Published: 15 June 2020
Fig. 11 Modeling results for powder melting and formation of liquid droplets connected to the powder bed. (a) Temperature field (top view) and isocontours (black lines) from 300 to 2300 °C (570 to 4170 °F) at 400 °C (750 °F) intervals. The liquidus line is also presented (red contour) for T More
Image
Published: 30 June 2023
Fig. 1 (a) An etched micrograph of a crackfree single-pass Rene 80 wall built with directed-energy deposition compared to (b) a cracked Rene 80 25 mm (1 in.) cube build performed with the same process parameters. Images (c) and (d) show the different melt pool depths and temperatures in front More
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005202
EISBN: 978-1-62708-187-0
... of a consumable electrode by means of a direct current arc (electrode negative, melt pool positive) in a vacuum on the order of 0.1 to 1 Pa (7.5 × 10 −4 to 0.0075 torr). In some cases, the melting is carried out under inert gas with a pressure up to 1000 Pa (7.5 torr). Evaporation losses of volatile alloying...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005510
EISBN: 978-1-62708-197-9
... and white spots, can occur. The metallurgical structure of the remelted ingot depends on the temperature gradient and the thermal history of the solidifying metal. The behavior of an inclusion that enters the melt pool is governed by its density, which controls the buoyancy force, and its size...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005664
EISBN: 978-1-62708-174-0
... temperature of the droplets changes with the current and droplet volume in addition to other metal parameters. Hence, the wire metal melt cannot be accurately determined from the heat. Arc Length/Voltage Control The length of the arc column from the droplet to the cathode on the weld pool surface...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005591
EISBN: 978-1-62708-174-0
... to cause rapid convection and good circulation, needed to distribute heat throughout the weld joint. Fluidity of a slag depends mainly on its chemical composition and operating temperature. The melting point of a flux must be below that of the base metal for weld pool refining, and its boiling temperature...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005201
EISBN: 978-1-62708-187-0
... from the electrode to the molten pool. During the formation of the liquid film, the metal is refined and cleaned of contaminants, such as oxide particles. The high degree of superheat of the slag and of the metal favors the metal/slag reaction. Melting in the form of metal droplets greatly increases...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001371
EISBN: 978-1-62708-173-3
... is extinguished. During the process, flux is added periodically or continuously to maintain an adequate slag covering over the pool of molten metal. Two or more retaining shoes hold the molten metal in place until it has solidified. In normal operation with a constant potential power source, the electrode melts...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001334
EISBN: 978-1-62708-173-3
... of the solvent metal or alloy so that, for a limited range of temperature above the melting point, the surface tension increases with increasing temperature. With a positive surface tension temperature coefficient, the surface tension will be highest near the center of the weld pool. Such a surface tension...