Preface to the Third Edition

Cahn, Robert W.; Haasen, P.

doi:10.1016/b978-0-444-53770-6.05002-4

Cited by 87 publications

(123 citation statements)

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“…[25] Besides these factors, enthalpy and entropy of mixing are the most important phase formation parameters for HEAs. Zhang et al [26] and Guo et al [27] studied the effect of these parameters on the phase formation of HEAs and obtained similar conclusions: the formation of simple or complex phases depends mainly on the enthalpy of mixing ( H mix ), entropy of mixing ( S mix ), and atomic size differences (δ).…”

Section: Simple Solid Solution or Intermetallics? One Fundamental Anmentioning

confidence: 99%

High-Entropy Alloys: A Critical Review

Tsai

Yeh

2014

Materials Research Letters

2,639

853

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High-entropy alloys (HEAs) are alloys with five or more principal elements. Due to the distinct design concept, these alloys often exhibit unusual properties. Thus, there has been significant interest in these materials, leading to an emerging yet exciting new field. This paper briefly reviews some critical aspects of HEAs, including core effects, phases and crystal structures, mechanical properties, high-temperature properties, structural stabilities, and corrosion behaviors. Current challenges and important future directions are also pointed out.

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Section: Simple Solid Solution or Intermetallics? One Fundamental Anmentioning

confidence: 99%

High-Entropy Alloys: A Critical Review

Tsai

Yeh

2014

Materials Research Letters

2,639

853

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“…Given the extremely long service time, Laves phase and M 23 C 6 will grow and coarsen considerably during the exposure at high temperatures, and in doing so change the interparticle spacing. The precipitation-hardening contribution r p is inverse proportional to interparticle spacing, which is estimated by considering the coarsening kinetics only, [25][26][27] …”

Section: Model Descriptionsmentioning

confidence: 99%

The Computational Design of W and Co-Containing Creep-Resistant Steels with Barely Coarsening Laves Phase and M23C6 as the Strengthening Precipitates

Zwaag

2014

Metall Mater Trans A

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Generally, Laves phase and M 23 C 6 are regarded as undesirable phases in creep-resistant steels due to their very high-coarsening rates and the resulting depletion of beneficial alloying elements from the matrix. In this study, a computational alloy design approach is presented to develop martensitic steels strengthened by Laves phase and/or M 23 C 6 , for which the coarsening rates are tailored such that they are at least one order of magnitude lower than those in existing alloys. Their volume fractions are optimized by tuning the chemical composition in parallel. The composition domain covering 10 alloying elements at realistic levels is searched by a genetic algorithm to explore the full potential of simultaneous maximization of the volume fraction and minimization of the precipitates coarsening rate. The calculations show that Co and W can drastically reduce the coarsening rate of Laves and M 23 C 6 and yield high-volume fractions of precipitates. Mo on the other hand was shown to have a minimal effect on coarsening. The strengthening effects of Laves phase and M 23 C 6 in the newly designed alloys are compared to existing counterparts, showing substantially higher precipitation-strengthening contributions especially after a long service time. New alloys were designed in which both Laves phase and M 23 C 6 precipitates act as strengthening precipitates. Successfully combining MX and M 23 C 6 was found to be impossible.

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“…With assumptions usually adopted for the TRS, it is possible to state that the force π 0 is a measure of internal stresses of the third kind, see [7,9,11,25,29,[44][45][46], which cannot be removed by annealing and so π 0 never becomes equal to zero.…”

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confidence: 99%

Thermodynamic potential of free energy for thermo-elastic-plastic body

Śloderbach

Pająk

2017

Continuum Mech. Thermodyn.

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The procedure of derivation of thermodynamic potential of free energy (Helmholtz free energy) for a thermo-elastic-plastic body is presented. This procedure concerns a special thermodynamic model of a thermo-elastic-plastic body with isotropic hardening characteristics. The classical thermodynamics of irreversible processes for material characterized by macroscopic internal parameters is used in the derivation. Thermodynamic potential of free energy may be used for practical determination of the level of stored energy accumulated in material during plastic processing applied, e.g., for industry components and other machinery parts received by plastic deformation processing. In this paper the stored energy for the simple stretching of austenitic steel will be presented. KeywordsFree energy · Thermo-elastic-plastic body · Enthalpy · Exergy · Stored energy of plastic deformations · Mechanical energy dissipation · Thermodynamic reference state

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Preface to the Third Edition

Cited by 87 publications

References 0 publications

High-Entropy Alloys: A Critical Review

High-Entropy Alloys: A Critical Review

The Computational Design of W and Co-Containing Creep-Resistant Steels with Barely Coarsening Laves Phase and M23C6 as the Strengthening Precipitates

Thermodynamic potential of free energy for thermo-elastic-plastic body

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