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flux morphology

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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005300
EISBN: 978-1-62708-187-0
... cleaning fluxes furnace wall cleaner fluxes transfer ladles casting furnaces flux morphology flux injection IT IS WELL KNOWN that molten aluminum casting alloys have two inherent characteristics: the tendency to absorb hydrogen gas, and the ability to readily oxidize. Hydrogen is made available...
Image
Published: 01 January 1994
Fig. 6 Geometrical shadowing of the deposition flux by a particle on the surface relative to the angle of incidence and the surface morphology More
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001286
EISBN: 978-1-62708-170-2
... generates pinholes in the deposited film. Surface morphology —affects the angle-of-incidence of the depositing atoms and thus the film growth. Geometrical shadowing of the surface from the depositing adatom flux reduces surface coverage. Surface morphology can affect the film properties and stability...
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
..., slight increase; C, no change; D, decrease An additional factor controlling the weld puddle morphology is the welding flux conductivity. Actually, the bulk of the electrical energy is converted into thermal energy in a thin layer of the slag contiguous to the electrode tip, which acts as the heat...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005209
EISBN: 978-1-62708-187-0
... build-up at the solid-liquid interface forming transients and steady state, the morphological stability/instability and perturbation theory, and rapid solidification effects, including solute trapping and oscillatory instabilities. The article presents a microstructural selection map that presents...
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
... (shallow weld pool, high form factor, acute angle between grains). (b) Undesirable weld pool dimensions (deep weld pool, low form factor, obtuse angle between grains). Source: Ref 6 An additional factor controlling the weld puddle morphology is the welding flux conductivity. Actually, the bulk...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006535
EISBN: 978-1-62708-207-5
.... In the early 1990s, flux manufacturers evaluated more closely the use of fluorides, with the goal of minimizing environmental emissions of fluorides. Thus, granular fluxes were developed. A granular flux may or may not have the same formulation as a powdered flux. Due to their different grain morphology...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005571
EISBN: 978-1-62708-174-0
... Abstract Fluxes are added to the welding environment to improve arc stability, provide a slag, add alloying elements, and refine the weld pool. This article discusses the effect of oxygen, which is an important chemical reagent to control the weld metal composition, microstructure...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005247
EISBN: 978-1-62708-187-0
... are essentially pure silicon. Original magnification: ∼800× The hardness of silicon generally provides two very dramatic effects in aluminum-silicon casting alloys: superior wear resistance and reduced tool life during machining ( Ref 1 ). Both are affected by the volume fraction, size, morphology...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001339
EISBN: 978-1-62708-173-3
... classified and advertised their fluxes with this index. It is believed that high basicity means high toughness, a quality of great interest to the engineer, while an acidic flux means excellent slag behavior, a characteristic of interest to the welder attempting to improve weld bead morphology and deposition...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005622
EISBN: 978-1-62708-174-0
... Abstract Penetration-enhanced gas tungsten arc welding (GTAW) processes have been referred to variously as flux tungsten inert gas (TIG), A-TIG, and GTAW with a penetration-enhancing compound. This article provides a discussion on the principles of operation, advantages, disadvantages...
Book Chapter

By Donald M. Mattox
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001289
EISBN: 978-1-62708-170-2
... surface and the growing film are subjected to a continuous or periodic flux of energetic massive bombarding particles (ions, radicals, atoms, or molecules—reactive or inert) sufficient to cause changes in the film formation process and the properties of the deposited film ( Ref 1 , 2 , 3 , 4...
Book Chapter

Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006225
EISBN: 978-1-62708-163-4
... defines a specific interface morphology; therefore, the term eutectic grain is used throughout this section. The regularity of some eutectic microstructures can be used to make in situ composites. By using a controlled heat flux to achieve slow directional solidification, it is possible to obtain...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003175
EISBN: 978-1-62708-199-3
... surpasses that of forgings. The films are not normally visible during radiographic inspection and must be prevented rather than found and repaired. Oxides are controlled by using covering fluxes during melting. These fluxes are usually magnesium chloride salts, and they float on the melt surface...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001432
EISBN: 978-1-62708-173-3
... cracking starts at hydrogen-containing defects subject to longitudinal stresses. Weld metal cracks do not always extend to the surface. In submerged arc weld metal made with damp fluxes, a unique crack morphology known as chevron cracking can occur. Here the cracks lie at 45° to the weld axis. One...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005439
EISBN: 978-1-62708-196-2
... morphology and volume fraction. Here, the assumption that leads to the simplest equations is made. It is assumed that the volume fraction is so small that precipitates will act like point sources or sinks of solute and thus will not block or mediate the matrix flux in any way. Therefore, the flux...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003593
EISBN: 978-1-62708-182-5
... with nickel, the local salt basicity (sodium oxide activity) increases, such that the normally protective NiO scale is dissolved/fluxed to form a basic solute, proposed to be nickelate ions. As part of the characteristic morphology for a corroded nickel specimen, nickel sulfide was seen in the metal...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006302
EISBN: 978-1-62708-179-5
... and chemical reactions). For both soldering and brazing, the fillers tend to be alloys with eutectic or near-eutectic compositions from alloy systems having eutectics. Fluxes in brazing and soldering also are used to remove oxides from the base metal surface, to protect the clean surface from reoxidation...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005218
EISBN: 978-1-62708-187-0
... morphology evolution, solute transport, and various process phenomena at spatiotemporal resolutions. It discusses the three viable imaging techniques made available by synchrotron radiation for the real-time investigation of solidification microstructures in alloys. These include two-dimensional X-ray...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001345
EISBN: 978-1-62708-173-3
..., temperature and time, rate and source of heating, and protection by an atmosphere or flux. The article explains the different types of brazing processes: manual torch brazing, furnace brazing, induction brazing, dip brazing, resistance brazing, infrared (quartz) brazing, exothermic brazing, electron-beam...