Journal ArticleDOI
Macroscopic and microscopic characterizations of Portevin-LeChatelier effect in austenitic stainless steel using high-temperature digital image correlation analysis
TLDR
Using digital image correlation (DIC) analysis in an Fe-19Cr-13Ni-0.2C austenitic stainless steel (mass), the tensile deformation behavior accompanied with the Portevin-LeChatelier (PLC) effect was investigated at high temperatures of 723-823 K under various applied strain rates of 10−4 s−1 −1 −5 −5 × 10−3 s− 1.About:
This article is published in Acta Materialia.The article was published on 2021-02-15. It has received 24 citations till now. The article focuses on the topics: Strain rate & Dynamic strain aging.read more
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Dynamic strain ageing in an AlMg alloy at different strain rates and temperatures: experiments and constitutive modelling
TL;DR: In this article , a constitutive model based on the mechanical threshold stress (MTS) framework is proposed and used to calculate the stress-strain response at different strain rates and temperatures.
Journal ArticleDOI
Micro-mechanical deformation behavior of CoCrFeMnNi high-entropy alloy
Kaiju Lu,Ankur Chauhan,Dimitri Litvinov,Aditya Srinivasan Tirunilai,Jens Freudenberger,Jens Freudenberger,Alexander Kauffmann,Martin Heilmaier,Jarir Aktaa +8 more
TL;DR: In this paper, the micro-mechanical behavior of CoCrFeMnNi high-entropy alloy was investigated using an in-house micro-tensile setup at room temperature and at different strain rates.
Journal ArticleDOI
Natural aging behaviors of Al-Cu-Li alloy: PLC effect, properties and microstructure evolution
TL;DR: In this paper , the authors explored the NA behaviors and revealed the underlying mechanism for the combined interaction of Cu and Li solute atoms with mobile dislocations in 2195 Al-Cu-Li alloy.
Journal ArticleDOI
Behaviour of austenitic stainless steel bolts at elevated temperatures
TL;DR: In this article, the residual properties of Young's modulus, yield strength, ultimate strength and strain-hardening exponent of A2-70 stainless steel bolts were evaluated using five ambient temperature mechanical parameters.
Journal ArticleDOI
Effect of material configuration and welding parameter on weld formability and mechanical properties of bobbin tool friction stir welded Al-Cu and Al-Mg aluminum alloys
TL;DR: In this paper, the microstructure and mechanical properties of joints between Al-Cu and Al-Mg aluminum alloys using bobbin tool friction stir welding (BT-FSW) were studied.
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.
Journal ArticleDOI
Serrated plastic flow
TL;DR: In this paper, the authors present an assessment of the current understanding of the phenomenon of serrated plastic flow, which manifests itself as serrations, load drops, jerkiness or other discontinuities in the stress-strain curves obtained in constant extension rate tensile tests, and as sudden bursts of strain in constant loading rate tests and in constant load (stress) creep tests (the so called staircase creep).
Journal ArticleDOI
New observations on the mechanisms of dynamic strain aging and of jerky flow
R.A. Mulford,U.F. Kocks +1 more
TL;DR: In this article, the rate sensitivity of the flow stress was investigated as a function of pre-strain for a commercial nickel alloy (INCONEL 600) and for polycrystalline Al-1% Mg. over a wide temperature range encompassing the regime of jerky flow.
Journal ArticleDOI
Localized Deformation due to Portevin-LeChatelier Effect in 18Mn-0.6C TWIP Austenitic Steel
TL;DR: In this article, the thermo-mechanical properties of low stacking fault energy austenitic Fe18Mn0.6C steel exhibiting twinning-induced plasticity were investigated using infrared thermography.
Journal ArticleDOI
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.
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Effect of strain rate on spatio-temporal behavior of Portevin–Le Châtelier bands in a twinning induced plasticity steel
Junying Min,Jianping Lin,Bo Sun +2 more