The strain dependence of static strain aging in a Gold-Copper alloy

Beukel, A. van den; Blonk, J. C. G.; Haastert, G. H. Van

doi:10.1016/0001-6160(83)90065-2

Cited by 15 publications

(1 citation statement)

References 12 publications

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“…Thus, the only * Corresponding author: evgeniya.dontsova@ubc.ca fully atomistic prediction of the depinning stress that has been performed to date has focused on solute redistribution across the glide plane occurring at very short times, which has been argued to underlie the phenomenon of dynamic strain aging in the commercially important Al-Mg system [10,11]. Compared to static strain aging, dynamic strain aging is a much more complex phenomenon as information is required about the mobile dislocation density and mean waiting time of a dislocation at an obstacle [12,13]. In the case of static strain aging the strength should, to a first order approximation, depend only on the time and temperature of the aging treatment.…”

Section: Introductionmentioning

confidence: 99%

Solute segregation kinetics and dislocation depinning in a binary alloy

2015

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Static strain aging, a phenomenon caused by diffusion of solute atoms to dislocations, is an important contributor to the strength of substitutional alloys. Accurate modeling of this complex process requires both atomic spatial resolution and diffusional time scales, which is very challenging to achieve with commonly used atomistic computational methods. In this paper, we use the recently developed "diffusive molecular dynamics" (DMD) method that is capable of describing the kinetics of the solute segregation process at the atomic level while operating on diffusive time scales in a computationally efficient way. We study static strain aging in the Al-Mg system and calculate the depinning shear stress between edge and screw dislocations and their solute atmospheres formed for various waiting times with different solute content and for a range of temperatures. A simple phenomenological model is also proposed that describes the observed behavior of the critical shear stress as a function of segregation level.

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Section: Introductionmentioning

confidence: 99%

Solute segregation kinetics and dislocation depinning in a binary alloy

2015

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A Study of Basic Processes Characterizing Dynamic Strain Ageing

Springer

Nortmann

Schwink

1998

phys. stat. sol. (a)

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Solid-Solution Strengthening by Oxygen in Nb-Ta and Nb-Mo Single Crystals

Miura

Yoshimi

Hanada

2001

phys. stat. sol. (a)

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We have investigated the high-temperature solid-solution strengthening by oxygen in Nb, Nb-Ta and Nb-Mo single crystals by compression tests with constant strain rate. Nb, Nb-20Ta, Nb-40Ta, Nb-20Mo, and Nb-40Mo single crystals with various O content were grown by use of the electron-beam floating zone melting method. It is found that Nb and Nb-Ta single crystals are strengthened by oxygen at temperatures below 1100 K, while Nb-20Mo single crystals are strengthened even at 1473 K. The critical resolved shear stress (c.r.s.s.) of Nb-Ta single crystals at 298 K increases linearly with increasing O content, irrespective of Ta content. Furthermore, the increment of c.r.s.s. of Nb-Ta single crystals is larger than that of Nb. The c.r.s.s. of Nb-Mo single crystals is higher than that of Nb for all temperatures tested, and the c.r.s.s. of Nb-20Mo single crystals also increases with increasing O content. These results indicate that the interstitial-substitutional (i-s) interaction between O and Ta or Mo affects the mechanical properties in the Nb-based alloys at high temperature.

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The strain dependence of static strain aging in a Gold-Copper alloy

Cited by 15 publications

References 12 publications

Solute segregation kinetics and dislocation depinning in a binary alloy

Solute segregation kinetics and dislocation depinning in a binary alloy

A Study of Basic Processes Characterizing Dynamic Strain Ageing

Solid-Solution Strengthening by Oxygen in Nb-Ta and Nb-Mo Single Crystals

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