A quantitative theory of grain-boundary motion and recrystallization in metals in the presence of impurities

Lücke, K.; Detert, Klaus

doi:10.1016/0001-6160(57)90109-8

Cited by 532 publications

(182 citation statements)

References 2 publications

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“…tilt GB. Experimental data correlated well with predictions from the impurity drag theory [12,13]. The temperature dependence exhibits three sections:…”

Section: Resultssupporting

confidence: 72%

Shape of Moving Grain Boundary and its Influence on Grain Boundary Motion in Zinc

Sursaeva

Straumal

2006

DDF

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tilt grain boundary (GB) with Σ =15 and misorientation angle 29° in Zn bicrystal have been investigated. The stationary shape of migrating GB has been studied and the migration rate has been measured by optical microscopy in situ between 558 and 683 K using polarized light. In certain experimental runs the migrating GB is faceted and moves thermally activated. Its kinetics follows the Arrhenius type dependence despite the fact that shape of moving GB depends on temperature. After detachment from impurity cloudtilt GB migrates activationless in the temperature interval 618÷683 K. The detachment temperature is 618 K. The non-physically high value of the apparent migration activation enthalpy can appear due to the change of GB shape from faceted to smooth and back.

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“…tilt GB. Experimental data correlated well with predictions from the impurity drag theory [12,13]. The temperature dependence exhibits three sections:…”

Section: Resultssupporting

confidence: 72%

Shape of Moving Grain Boundary and its Influence on Grain Boundary Motion in Zinc

Sursaeva

Straumal

2006

DDF

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“…Grain boundary motion in metals typically occurs at elevated temperatures, and is driven by a free energy gradient across the boundary. The boundary mobility is greatly reduced by the addition of solutes [6]. Winning et al [7] found that both low-angle and high-angle grain boundaries in pure Al move by an external shear stress at temperatures above 200°C.…”

Section: Introductionmentioning

confidence: 99%

Effects of solute Mg on grain boundary and dislocation dynamics during nanoindentation of Al–Mg thin films

et al. 2004

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Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. AbstractUsing in situ nanoindentation in a transmission electron microscope (TEM) the indentation-induced plasticity in ultrafinegrained Al and Al-Mg thin films has been studied, together with conventional quantitative ex situ nanoindentations. Extensive grain boundary motion has been observed in pure Al, whereas Mg solutes effectively pin high-angle grain boundaries in the Al-Mg alloy films. The proposed mechanism for this pinning is a change in the atomic structure of the boundaries, possibly aided by solute drag on extrinsic grain boundary dislocations. The mobility of low-angle boundaries is not affected by the presence of Mg. Based on the direct observations of incipient plasticity in Al and Al-Mg, it was concluded that solute drag accounts for the absence of discrete strain bursts in indentation of Al-Mg.

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“…Many studies have been conducted on the theory of solute drag [116,117]. Cahn [116] reported that with the increase of solute levels the grain growth rate decreases.…”

Section: Grain Growth Inhibition By Solute Dragmentioning

confidence: 99%

Thermomechanical Processing of Structural Steels with Dilute Niobium Additions

Cui

Patel²,

Palmiere

2016

HSLA Steels 2015, Microalloying 2015 &Amp; Offshore Engineering Steels 2015

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-i - AbstractIn this thesis, the influence of various dilute Nb additions (0.005-0.02 wt%) on austenite microstructure evolution along thermomechanical processing, in terms of austenite recrystallisation and grain growth, were investigated using steels with three carbon content levels.At the homogenisation temperature of 1250°C, all dilute Nb additions were dissolved in low carbon steels whereas the Nb dissolution limits for 0.4 wt% and 0.6 wt% C steels were 0.012 wt% and 0.08 wt%, respectively. Dilute Nb additions did not show significant influence on homogenised austenite grain size. The dramatic increase in C contents was more influential, which decreased the homogenised austenite grain size.The influence of dilute Nb additions and C contents on dynamic recrystallisation behaviour was studied by rough rolling at high deformation temperature with low strain rate. The dilute Nb additions were found to increase the critical strain of dynamic recrystallisation whereas C contents showed no influence on the dynamic recrystallisation behaviour.The austenite recrystallisation behaviour after finish rolling and after the holding period between finishing passes were studied by means of interrupted plane strain compression (PSC) tests and double hit PSC tests. It was found that with low Nb supersaturation, recrystallisation happened prior to Nb precipitation. Solute Nb in austenite delayed the onset of austenite recrystallisation through solute drag effect.With high Nb supersaturation, Nb precipitation occurred before the onset of recrystallisation which completely retarded austenite recrystallisation.The austenite grain growth during the holding period between finish rolling passes was studied by the evolution of prior-austenite grain size before and after the 20s holding period at the highest finish rolling temperature (1050°C). There was no Nb precipitation found and the difference in austenite grain growth behaviour was Abstract -iiattributed to the solute drag effect from both Nb and C in solution. It was found that Nb in solution suppressed austenite grain growth. However, the effectiveness of solute Nb in suppressing austenite grain growth was affected by the C content. Acknowledgement

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A quantitative theory of grain-boundary motion and recrystallization in metals in the presence of impurities

Cited by 532 publications

References 2 publications

Shape of Moving Grain Boundary and its Influence on Grain Boundary Motion in Zinc

Shape of Moving Grain Boundary and its Influence on Grain Boundary Motion in Zinc

Effects of solute Mg on grain boundary and dislocation dynamics during nanoindentation of Al–Mg thin films

Thermomechanical Processing of Structural Steels with Dilute Niobium Additions

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