Interfacial Segregation in Multicomponent Systems

Guttmann, M.

doi:10.1007/978-1-4613-3500-9_17

Cited by 31 publications

(46 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In any event, it appears already for the simple case of binary alloys that mere numerical correlations do not identify the physical mechanism with certainty, as each correlation can appear as good.. . or as bad as the other [18,20]. …”

Section: Binary Solutionsmentioning

confidence: 94%

Thermochemical Interactions Versus Site Competition in Grain Boundary Segregation and Embrittlement in Multicomponent Systems

Guttmann¹

1995

J. Phys. IV France

View full text Add to dashboard Cite

Section: Binary Solutionsmentioning

confidence: 94%

Thermochemical Interactions Versus Site Competition in Grain Boundary Segregation and Embrittlement in Multicomponent Systems

Guttmann¹

1995

J. Phys. IV France

View full text Add to dashboard Cite

“…For both, the driving force for segregation in austenite is high (higher than in ferrite, due to the lower solubilities) and both have been shown to segregate at higher-than-equilibrium levels in steel. 31,34,35) Sulfur and phosphorus exhibit very similar behaviours in austenite: comparable diffusivities, similar segregation energies (sulfur's is higher) and nearly identical diffusion kinetics. 36,37) Although it has been shown that sulfur can segregate preferentially when in competition with phosphorus 34,35) in the range 500 to 700°C, this effect diminishes with increasing temperature, as does the overall magnitude of the segregation energy-an effect that is offset by the lower solubility of phosphorus in austenite as compared to ferrite.…”

Section: Comparison Of Solute Elementsmentioning

confidence: 98%

“…31,34,35) Sulfur and phosphorus exhibit very similar behaviours in austenite: comparable diffusivities, similar segregation energies (sulfur's is higher) and nearly identical diffusion kinetics. 36,37) Although it has been shown that sulfur can segregate preferentially when in competition with phosphorus 34,35) in the range 500 to 700°C, this effect diminishes with increasing temperature, as does the overall magnitude of the segregation energy-an effect that is offset by the lower solubility of phosphorus in austenite as compared to ferrite. 38,39) In addition, the bulk concentration of sulphur in the tested material is far lower than that of phosphorus.…”

Section: Comparison Of Solute Elementsmentioning

confidence: 98%

Static and Dynamic Strain Aging at High Temperatures in 304 Stainless Steel

Stewart

Jonas

2004

ISIJ International

View full text Add to dashboard Cite

Commercial 304 austenitic stainless steel was deformed at high temperatures. The experiments involved 2-hit hot compression and multi-pass hot torsion testing; the experimental variables included strain rate, temperature and interpass time. The relationship between these variables and the degree of interpass softening produced unexpected results. Specifically, the normal effect of temperature on the static softening kinetics was reversed at intermediate interpass times: the fractional softening decreased with increasing temperature for these times. The diffusion kinetics and segregation mechanics of the substitutional impurities in the material, combined with the experimental results, suggest that the temporary non-equilibrium segregation of phosphorus (and/or sulphur) to dislocations is responsible for the observed behaviour. Additionally, the observed trend in strain rate sensitivity with increasing deformation temperature indicates that dynamic strain aging was taking place.KEY WORDS: recrystallization; non-equilibrium segregation; stainless steel; static strain aging; dynamic strain aging.rate to vacancy concentration. It has been observed that, under specific thermal and straining conditions, the nonequilibrium segregation of substitutional solutes will occur in steel. 7) This involves the segregation of solute atoms to features such as grain boundaries in concentrations well in excess of equilibrium values. The non-equilibrium segregation is temporary; back diffusion from areas of excess concentration to adjacent regions of solute depletion will return the solute distribution to its equilibrium state given sufficient time. 8) Materials and MethodsThe material used for virtually all the experiments in this work was a 304 austenitic stainless steel obtained from a single billet produced by Atlas Stainless Steel in Tracy, Quebec. In addition, a small amount of ultra-high purity 18Cr-12Ni-Fe 9,10) alloy was obtained and tested. The compositions of these steels are given in Table 1, along with the 304 specifications. Austenitic stainless steel has a low stacking fault energy, 11) in the range 21 mJ m Ϫ2 . Numerous studies of the recrystallization behaviour of such materials have been conducted over the past thirty years (especially involving torsion testing). [12][13][14] The stainless steel tested was obtained in the form of a billet 30-cmϫ15-cmϫ15-cm. The billets were sectioned parallel to the transverse direction and the sections sliced along the normal direction. After machining, the resulting cylindrical samples had their longitudinal axes parallel to the normal direction of the billet. The initial grain size was not a variable of interest in this work, but was essentially constant and in the range 80-100 mm. Torsion samples (Dϭ6.3 mm, Lϭ22 mm) were also machined from the same billet. These were machined such that the longitudinal axis of the samples were aligned along the rolling direction of the billet.Two-hit compression tests were performed primarily for the study of static softening. The tests were co...

show abstract

“…On the other hand, this element has a strong tendency to segregate at grain boundary and to induce cold brittleness. Segregation formulation was developed by Guttmann and Mclean in a ternary system (Fe, M, I) [4] based on the sublattice model in melt salts and stoichiometric phases contributed by Hillert et al [5] . Li et al extended the segregation equation into a five-element system [6] , and generalized it into a multicomponent system as [7] : [7,8], assuming that interaction energy keeps the same on grain boundaries and in matrix and omitting the interaction between impurities and vacancy and between metal element and iron, a series of parameters [7,8] can be listed as follows:…”

Section: Trip Steel Containing Pmentioning

confidence: 99%

Application of Thermodynamics and Kinetics in Materials Engineering

Li¹

2012

Thermodynamics - Fundamentals and Its Application in Science

View full text Add to dashboard Cite

Interfacial Segregation in Multicomponent Systems

Cited by 31 publications

References 23 publications

Thermochemical Interactions Versus Site Competition in Grain Boundary Segregation and Embrittlement in Multicomponent Systems

Thermochemical Interactions Versus Site Competition in Grain Boundary Segregation and Embrittlement in Multicomponent Systems

Static and Dynamic Strain Aging at High Temperatures in 304 Stainless Steel

Application of Thermodynamics and Kinetics in Materials Engineering

Contact Info

Product

Resources

About