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heat flow

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420429
EISBN: 978-1-62708-310-2
..., cellular, and dendritic growth, the basic freezing sequence for an alloy casting, and the variations in cooling rate, heat flow, and grain morphology in different areas of the mold. It also describes the types of segregation that occur during freezing, the effect of solidification rate on secondary...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040059
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the factors that influence temperature in forging operations and presents equations that can be used to predict and control it. The discussion covers heat generation and transfer, the effect of metal flow, temperature measurement, testing methods...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870201
EISBN: 978-1-62708-314-0
..., and data plots. composite curing cure monitoring heat transfer mathematical models polymer matrix composites residual stress resin flow resin kinetics resin viscosity void formation PROCESSES FOR NEW COMPOSITE MATERIALS, during the 1960s and 1970s, were based solely on previous...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270097
EISBN: 978-1-62708-301-0
... of the bearings had been subjected to excessive friction, evidenced by brinelling, metal flow, heat tinting, deformation, and wear. They also observed extensive grooving on a retaining plate and several washers matching the diameter of the outer bearing races. Based on their findings, investigators concluded...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290061
EISBN: 978-1-62708-306-5
... Abstract Resistance welding is a group of processes in which the heat for welding is generated by the resistance to the flow of an electrical current through the parts being joined. This chapter discusses the processes, advantages, and limitations of specific resistance welding processes...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280091
EISBN: 978-1-62708-267-9
..., the objectives of forging may include grain refinement, control of second-phase morphology, controlled grain flow, and the achievement of specific microstructures and properties. The chapter explains how these objectives can be met by managing work energy via temperature and deformation control. It also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110209
EISBN: 978-1-62708-247-1
... Abstract Many defects generate excessive heat during operation; this is due to the power dissipation associated with the excess current flow at the defect site. There are several thermal detection techniques for failure analysis and this article focuses on infrared thermography with lock...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040185
EISBN: 978-1-62708-300-3
... Abstract This chapter presents a relatively simple method for estimating forging loads and flow stresses. The method uses the slab analysis technique and accounts for material properties, friction and heat transfer, press ram speed, forging geometry, and billet and die temperatures. The chapter...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290035
EISBN: 978-1-62708-319-5
... of polymers and waxes dispersed between the particles, is heated and forced to flow into a mold or through a die. As the feedstock cools, the binder becomes rigid and holds the particles in place. Extrusion is applied to long, thin shapes, and injection molding is applied to three-dimensional complex shapes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190001
EISBN: 978-1-62708-296-9
... of the first order; λ 2 (secondary dendrite arm spacing, or SDAS), distance between the dendrite axes of the second order. Source: Ref 8 , 10 Spatial orientation of the dendrite axis in a cast part is subordinated to the heat flow direction and temperature gradient. Fraś ( Ref 1 ) and Rappaz...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... and flow into a joint by capillary action before the filler solidifies. For reactive metals such as titanium, brazing processes should be used that do not allow joint surfaces to come in contact with air during heating. Because titanium can become embrittled by the interstitial absorption of hydrogen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
... will be a function of both the surface power density and the time. Figure 5.1 shows how this temperature will vary on steel with power densities that range from 400 to 8000 W/cm 2 . At the lower value, it takes 2 min to melt the surface. If that heat source were a point on the flat surface, then the heat flow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
... not change with time, the fundamental relation for the unidirectional steady flow of heat through a solid by conduction, Fourier’s first law, can be expressed by: (Eq 1) Q = − λ ∂ T ∂ x where Q is the quantity of heat flowing through the unit area of a wall per unit time...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280079
EISBN: 978-1-62708-267-9
... structures have been produced by promoting unidirectional heat flow within the furnace during the solidification cycle. Substantial property improvements have resulted for many alloys. A logical extension of CG technology is the production of SC hot section aircraft gas turbine components. Directional...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870183
EISBN: 978-1-62708-314-0
... for unconsolidated blanks and blanks containing high contour. Impingement heating is a variation of convection heating that uses a multitude of high-velocity jets of heated gas that impinge on the surfaces, greatly enhancing the heat flow and reducing the time required to heat the part. In any thermoforming...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050009
EISBN: 978-1-62708-311-9
.... Induction heating occurs when a strong electromagnetic force field is produced from an induction coil close enough to a part to produce an electric current in the part. The part is heated mainly due to the resistance of the flow of this electric current. The actual heating is a complex function related...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410103
EISBN: 978-1-62708-280-8
... into the die cavity transfers sensible heat and latent heat to the die. The interface between the die and the solidifying metal offers some resistance to the heat flow. This resistance is dependent upon the die lubrication, the die surface oxidation, and the die surface roughness. The reciprocal of the overall...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.9781627083119
EISBN: 978-1-62708-311-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780359
EISBN: 978-1-62708-281-5
... spectroscopy produces a unique spectrum, which is comparable to the fingerprint of the material. It is the principal analytical technique used to qualitatively identify polymeric materials. Differential scanning calorimetry (DSC) is a thermoanalytical technique in which heat flow is measured...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440159
EISBN: 978-1-62708-262-4
... operation. Tempering prevents cracking by relieving some of the stress set up in hardening and imparts some degree of toughness to the hard case. Any electrically conducting material can be heated by electromagnetic induction. As alternating current flows through the inductor, or work coil (which does...