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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2022
DOI: 10.31399/asm.tb.dsktmse.t56050031
EISBN: 978-1-62708-432-1
... Abstract This chapter familiarizes readers with the use of Fick’s laws of diffusion in heat treating, coating, and other metallurgical processes. It contains worked solutions to nearly 30 problems requiring the calculation of activation energy, diffusion coefficient, concentration level...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240063
EISBN: 978-1-62708-251-8
... Abstract Diffusion is the movement of atoms through the crystalline lattice. This chapter discusses the two main types of diffusion that can occur in solids: interstitial diffusion and substitutional diffusion. It describes Fick's first and second laws of diffusion, with emphasis on several...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140063
EISBN: 978-1-62708-264-8
... Abstract Diffusion is the primary mechanism by which carbon atoms move or migrate in iron. It is driven by concentration gradients and aided by heat. This chapter provides a practical understanding of the diffusion process and its role in the production and treatment of steel. It discusses...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2022
DOI: 10.31399/asm.tb.dsktmse.t56050001
EISBN: 978-1-62708-432-1
... Abstract A working knowledge of diffusion is necessary to understand and predict the behavior of metals and alloys during manufacturing and in certain types of service. This chapter covers the fundamentals of diffusion in solids and some of the applications in which diffusion plays a role...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2022
DOI: 10.31399/asm.tb.dsktmse.9781627084321
EISBN: 978-1-62708-432-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.tm.t52320167
EISBN: 978-1-62708-357-7
... Abstract This chapter provides a detailed discussion on the Brownian motion, diffusion coefficient , and Fick's diffusion laws. It presents a review of solid phase diffusion and discusses the mechanism of diffusion and diffusion coefficient. Brownian motion diffusion coefficient Fick's...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230207
EISBN: 978-1-62708-351-5
...Selected material combinations used for diffusion brazing Table 6.1 Selected material combinations used for diffusion brazing Substrate Filler metal Process temperature Remelt temperature Ref °C °F °C °F Alumina Cu/Ni/Cu interlayers 1150 1920 1400 2550 Shalz et al...
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Published: 01 September 2022
Fig. 4 Illustrative example of vacancy diffusion or substitutional diffusion More
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Published: 01 December 2008
Fig. 6.2 Brownian motion and diffusion length. The diffusion length z is proportional to the square root of steps n . (a) The distance to which a drunken man moves. (b) The diffusion length of vacancies in Cu More
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Published: 01 December 2008
Fig. 6.8 The diffusion of C atoms in diffusion couple of Fe-Si-C system (the diffusion of Si atoms is very small). (a) The uphill diffusion can be observed in the concentration-distance curve of C atom. However, if (b) is converted into the activity-distance curve of C atoms, it is an ordinary More
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Published: 01 December 2008
Fig. 6.14 The comparison of the surface diffusion, the grain-boundary diffusion, and the lattice diffusion. (a) Short-circuit diffusion. (b) Mechanism of surface diffusion More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440279
EISBN: 978-1-62708-262-4
... discusses the advantages of boost/diffuse carburizing cycles. A table lists typical carburizing constants and boost/diffusion ratios needed to obtain a 0.80 to 0.90% surface carbon content in a low-alloy, low-carbon steel. A figure illustrates possible carbon penetration profiles from boost/diffuse cycles...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860133
EISBN: 978-1-62708-348-5
... materials. Figure 4.2 Typical thermal diffusivity illustration: temperature dependencies of selected technically important materials from 3 to 300 K. Only asingle curve is shown for each material, as is customary, but this is misleading for pure materials. Figure 4.3 Experimentally...
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Published: 01 June 2008
Fig. 5.1 Free-energy changes during diffusion in a concentration gradient. Source: Ref 1 More
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Published: 01 June 2008
Fig. 5.2 Interstitial and substitutional diffusion More
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Published: 01 June 2008
Fig. 5.3 Diffusion across an interface. Source: Ref 2 More
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Published: 01 June 2008
Fig. 5.5 Steady- and non-steady-state diffusion of gas across a membrane More
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Published: 01 June 2008
Fig. 5.8 Fick’s second law for diffusion couple. Source: Ref 3 More
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Published: 01 June 2008
Fig. 5.11 Variation of diffusion coefficient with carbon concentration. Source: Ref 6 More
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Published: 01 June 2008
Fig. 8.22 Diffusion of atoms and grain boundary movement. Source: Ref 2 More