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Book Chapter
Factors Influencing Heat Flow in Fusion Welding
Available to PurchaseSeries: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005573
EISBN: 978-1-62708-174-0
... Abstract This article reviews the classical models for the pseudo-steady-state temperature distribution of the thermal field around moving point and line sources. These include thick- and thin-plate models and the medium-thick-plate model. The analytical solutions to the differential heat flow...
Abstract
This article reviews the classical models for the pseudo-steady-state temperature distribution of the thermal field around moving point and line sources. These include thick- and thin-plate models and the medium-thick-plate model. The analytical solutions to the differential heat flow equation under conditions applicable to fusion welding are provided. The article also provides an overview of the factors affecting heat flow in a real welding situation using the analytical modeling approach because this makes it possible to derive relatively simple equations that provide the required background for an understanding of the temperature-time pattern.
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005588
EISBN: 978-1-62708-174-0
... these problems, this article presents an analysis of the welding heat flow, with focus on the fusion welding process. It discusses the analytical heat-flow solutions and their practical applications. The article concludes with a description of the effects of material property and welding condition...
Abstract
The finished product, after fusion welding, may contain physical discontinuities due to excessively rapid solidification, adverse microstructures due to inappropriate cooling, or residual stress and distortion due to the existence of incompatible plastic strains. To analyze these problems, this article presents an analysis of the welding heat flow, with focus on the fusion welding process. It discusses the analytical heat-flow solutions and their practical applications. The article concludes with a description of the effects of material property and welding condition on the temperature distribution of weldments.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001333
EISBN: 978-1-62708-173-3
... Abstract During fusion welding, the thermal cycles produced by the moving heat source cause physical state changes, metallurgical phase transformation, and transient thermal stress and metal movement. This article presents an analysis of heat flow in the fusion welding process. The primary...
Abstract
During fusion welding, the thermal cycles produced by the moving heat source cause physical state changes, metallurgical phase transformation, and transient thermal stress and metal movement. This article presents an analysis of heat flow in the fusion welding process. The primary objective of welding heat flow modeling is to provide a mathematical tool for thermal data analysis, design iterations, or the systematic investigation of the thermal characteristics of any welding parameters. The article addresses analytical heat-flow solutions and their practical applications. It describes the effects of material property and welding condition on the temperature distribution of weldments. The thermal properties of selected engineering materials are provided in a table.
Book Chapter
Heating and Heat-Flow Simulation
Available to PurchaseSeries: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005529
EISBN: 978-1-62708-197-9
... heating electrical heating heat flow simulation heat transfer properties heat treatment heating heat-source model heat-transfer model radiant-tube heating THE FIRST STEP IN EVERY HEAT TREATING PROCESS is heating the parts to the desired temperature. The heating process takes valuable time...
Abstract
This article provides information on the heat-source model, conduction heat-transfer model of parts and fixtures, and the radiation heat-transfer and convection heat-transfer models in a furnace. It describes the two types of furnaces used for heat treating: batch furnaces and continuous furnaces. The heating methods, such as direct-fired heating, radiant-tube heating, and electrical heating, are also discussed. Furnace temperature control is essential to ensure quality heat treatment. The article explains the operating procedure of the automatic temperature controllers used in most furnace operations. Heating simulations can be validated by comparison with measured results in full-scale furnaces. The article also presents several case studies to illustrate the use of the simulations.
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Various ways heat is transferred in grinding. Heat flow into the workpiece,...
Available to PurchasePublished: 30 September 2014
Fig. 79 Various ways heat is transferred in grinding. Heat flow into the workpiece, q w , is undesirable and can cause grinding burns. Source: Ref 70
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Typical arrangements for measuring heat flow with heat-flux transducers und...
Available to PurchasePublished: 01 January 2001
Fig. 4 Typical arrangements for measuring heat flow with heat-flux transducers under the ASTM C 518 method
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Published: 01 August 2013
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Temperature profile through the oxide layer in heat flow condition. Tempera...
Available to Purchase
in Corrosion of Zirconium Alloy Components in Light Water Reactors
> Corrosion: Environments and Industries
Published: 01 January 2006
Fig. 2 Temperature profile through the oxide layer in heat flow condition. Temperature decreasing from zirconium alloy to coolant
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Heat flow mechanisms and paths available in die casting. (a) Die open for s...
Available to PurchasePublished: 01 December 2008
Fig. 8 Heat flow mechanisms and paths available in die casting. (a) Die open for service. (b) Die closed after shot
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Published: 01 December 2008
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Directionality in microstructure. (a) From directional heat flow during wel...
Available to Purchase
in Physical Metallurgy Concepts in Interpretation of Microstructures
> Metallography and Microstructures
Published: 01 December 2004
Fig. 1 Directionality in microstructure. (a) From directional heat flow during welding. 5% nital etch. (b) From deformation and subsequent annealing. 5% nital etch. Original magnification 100×. (c) From deformation in a heavily drawn steel wire. 5% nital etch. Original magnification 1000×
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Heat flow mechanism map showing calculated field boundaries in transverse d...
Available to PurchasePublished: 31 October 2011
Fig. 8 Heat flow mechanism map showing calculated field boundaries in transverse direction (ψ=ψ m ) of plate versus θ p / n 3 and δ = vd /2 a . From this map, the validity range of the various solutions listed in Table 3 can be evaluated.
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General heat flow model for welding on medium-thick plates. (a) Physical re...
Available to PurchasePublished: 31 October 2011
Fig. 12 General heat flow model for welding on medium-thick plates. (a) Physical representation of the heat distribution by elementary point sources. (b) Method for calculating the temperature field around an elementary point source displaced along the y -axis. (c) Method for calculating
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Temperature distribution and heat flow in an infinite slab of thickness 2 L...
Available to PurchasePublished: 30 September 2014
Fig. 8 Temperature distribution and heat flow in an infinite slab of thickness 2 L at a temperature T i that has its surface temperature suddenly changed to T 0 . ( x is measured from the surface.)
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Calorimetry plot of heat flow versus temperature for polyamide 11. The melt...
Available to PurchasePublished: 15 June 2020
Fig. 4 Calorimetry plot of heat flow versus temperature for polyamide 11. The melting temperature is ~191 °C (~377 °F), and the crystallization temperature is ~161 °C (~322 °F) ( Ref 6 ).
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Published: 01 January 2001
Fig. 1 Heat flow vs. temperature. Glass transition temperature, T g , is determined by differential scanning calorimetry. Glass transition is marked by a change in heat capacity. Glass transition temperature is characterized as being the midpoint of the transition range. Source: MIL- HDBK-17
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Temperature distribution and heat flow in an infinite slab of thickness 2 L...
Available to PurchasePublished: 01 December 2009
Fig. 8 Temperature distribution and heat flow in an infinite slab of thickness 2 L at a temperature T i that has its surface temperature suddenly changed to T 0 . ( x is measured from the surface.)
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Heat flow as a function of temperature at a heating rate of 10 °C/min (18 °...
Available to Purchase
in Characterization of Thermosetting Resins and Polymers
> Characterization and Failure Analysis of Plastics
Published: 15 May 2022
Fig. 12 Heat flow as a function of temperature at a heating rate of 10 °C/min (18 °F/min) for an epoxy-amine cured isothermally at 160 °C (320 °F). d H/ dt , measured heat flow; T g , glass transition temperature; ΔH res , residual heat of reaction; ΔH rxn , heat of reaction. Source: Ref
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Heat flow inside of test piece (without agitation). (a) Steam line; T = 3.6...
Available to PurchasePublished: 01 February 2024
Fig. 15 Heat flow inside of test piece (without agitation). (a) Steam line; T = 3.660 s, T = 3.693 s, T = 3.726 s. (b) Velocity vector; T = 3.660 s, 3.693 s, 3.725 s
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Image
Heat flow in bottom of test piece. (a) Without agitation; velocity T = 8.0 ...
Available to PurchasePublished: 01 February 2024
Fig. 16 Heat flow in bottom of test piece. (a) Without agitation; velocity T = 8.0 s, steam line T = 8.0 s. (b) With agitation; velocity T = 5.0 s, steam line T = 5.0 s
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