Journal ArticleDOI
The effect of precipitation hardening on the portevin-le chatelier effect in an AlMgSi alloy
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TLDR
In this article, the influence of precipitation hardening on the characteristics of serrated yielding in an Al-Mg-Si alloy has been investigated, and the results are discussed in terms of changes in the matrix solute concentration, the rate controlling obstacles and the obstacle spacing accompanying the ageing process.About:
This article is published in Acta Metallurgica.The article was published on 1977-02-01. It has received 69 citations till now. The article focuses on the topics: Portevin–Le Chatelier effect.read more
Citations
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Microstructural and mechanical influences on dynamic strain aging phenomena
J. M. Robinson,M. P. Shaw +1 more
TL;DR: The PLC effect is a manifestation of macroscopic scale non-uniformities which have their origins on a microstructural level as discussed by the authors, and the coordination of dislocation level events with respect to PLC has been studied extensively.
Journal ArticleDOI
Serration and noise behaviors in materials
Yong Zhang,Jun Peng Liu,Shuying Chen,Xie Xie,Peter K. Liaw,Karin A. Dahmen,Jun Wei Qiao,Yan Li Wang +7 more
TL;DR: In this article, a review article summarizes the results of previous studies in this rapidly-developing field, attempting to provide a new perspective in expounding the connection between macroscopic properties and micro-mechanisms.
Journal ArticleDOI
Serrated flow in a ferritic stainless steel
Erwin Pink,Adolfo Grinberg +1 more
TL;DR: In this article, the authors analyzed the Portevin-Le Chatelier effect by measuring the stress drop Δσ and found no agreement between the theory and the experimental results for a ferritic stainless steel.
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On the influence of precipitation on the Portevin-Le Chatelier effect
Y. Brechet,Y. Estrin +1 more
TL;DR: In this paper, a model describing the interplay of precipitation and dynamic strain ageing is proposed, and it is shown that as a result of precipitation in concentrated solid solutions the critical strains for the occurrence of the Portevin-Le Chatelier effect should exhibit an "inverse" behaviour with temperature and strain rate as compared to the behaviour observed in dilute solid solutions.
Journal ArticleDOI
Serrated yielding in AISI 316 stainless steel
TL;DR: In this paper, the effect of prior ageing in the temperature range (823 −1323 K) for different periods of time on the serrated yielding behavior at 923 K was investigated.
References
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Journal ArticleDOI
A model for the Portevin-Le Chatelier effect in substitutional alloys
TL;DR: In this article, the authors derived a model for the onset of the Portevin-Le Chatelier effect in substitutional alloys, based on the solute locking of dislocations temporarily arrested at obstacles in the glide path.
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Slow strain-hardening of ingot iron
TL;DR: In this article, a modification of the Nabarro theory of blue brittleness is tentatively proposed, based on the anomalous velocity dependence of strain-hardening of Armco ingot iron.
Journal ArticleDOI
The Portevin-Le Chatelier effect in an Al-Mg-Si alloy
TL;DR: In this article, the authors investigated the Portevin-Le Chatelier effect in an Al-Mg-Si alloy and found that at high strain rates, e > 10−3 min−1, and room temperature, the periodic locking form of serrated flow was observed, which resulted from repeated Luder's band initiation and propagation along the specimen gauge length.
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Dislocation multiplication, vacancy accumulation, and the onset of jerky flow during forward and reverse 1 strain in Cu-3.2 at. % Sn
R. K. Ham,D. Jaffrey +1 more
TL;DR: In this paper, the effect of dislocation multiplication on the number of dislocations in thin films was investigated and the relation ρ = 4.73 × 1011 e1.17 was established.
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Serrated flow in gold-indium alloys
TL;DR: In this paper, the characteristics of serrated flow in gold-indium solid solution alloys are studied over a range of strain rates and temperatures. But the authors focus on two types of serrations, the general Type A locking serrations and the Type C unlocking serrations.