Experimental study of the Portevin-Le Chatelier effect under complex loading of Al-Mg alloy: procedure issues

The aim of this work is to solve the methodological issues of the experimental study of the nucleation and propagation of deformation bands due to the Portevin-Le Chatelier effect under conditions of complex loading. It is of interest to determine the boundaries of unstable plastic deformation of the AMg6 alloy under complex loading conditions. A technique for controlling the loading process with a given rate of deformation intensity of materials has been worked out. The results showed that short-term stops and unloading during loading influence on the value of critical deformation, at which the manifestation of the jerky flow begins. The evolution of inhomogeneous strain fields and local strain rates under conditions of manifestation of jerky flow during tension with torsion tests of Al-Mg alloy samples.

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Character of the deformation bands in the (A+B) regime of the Portevin-Le Chatelier effect in Al–2.5%Mg alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2008.12.030 ◽

2009 ◽

Vol 508 (1-2) ◽

pp. 156-160 ◽

Cited By ~ 23

Author(s):

A. Chatterjee ◽

A. Sarkar ◽

P. Barat ◽

P. Mukherjee ◽

N. Gayathri

Keyword(s):

Mg Alloy ◽

Deformation Bands ◽

Chatelier Effect

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Interrelation between local strain jumps and temperature bursts due to the jerky flow in metals under the complicate loading conditions: experimental study by using the DIC-technique and the IR-analysis

Procedia Structural Integrity ◽

10.1016/j.prostr.2016.06.423 ◽

2016 ◽

Vol 2 ◽

pp. 3393-3398 ◽

Cited By ~ 1

Author(s):

T.V. Tretyakova ◽

V.E. Wildemann

Keyword(s):

Experimental Study ◽

Local Strain ◽

Loading Conditions ◽

Jerky Flow ◽

Ir Analysis ◽

Dic Technique

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Relationship between Local Strain Jumps and Temperature Bursts Due to the Portevin-Le Chatelier Effect in an Al-Mg Alloy

Experimental Mechanics ◽

10.1007/s11340-012-9711-4 ◽

2013 ◽

Vol 53 (6) ◽

pp. 1025-1032 ◽

Cited By ~ 16

Author(s):

C. Bernard ◽

J. Coër ◽

H. Laurent ◽

P. Chauvelon ◽

P. Y. Manach

Keyword(s):

Local Strain ◽

Mg Alloy ◽

Chatelier Effect

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Experimental study of the influence of short-term tamponade with perfluorine organic compounds on the bioelectric functional activity of the retina of the rabbit eye

Oftalmologicheskii Zhurnal ◽

10.31288/oftalmolzh201418692 ◽

2014 ◽

Vol 47 (1) ◽

pp. 86-92

Author(s):

D. Zhmurik ◽

◽

N. Hramenko ◽

S. Slobodjanik ◽

M. Milienko ◽

...

Keyword(s):

Experimental Study ◽

Organic Compounds ◽

Functional Activity ◽

Short Term ◽

Rabbit Eye

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Numerical Simulation and Experimental Study of the Solidification of a Wedge-Shaped AZ31 Mg Alloy Casting

Canadian Metallurgical Quarterly ◽

10.1179/cmq.2009.48.2.145 ◽

2009 ◽

Vol 48 (2) ◽

pp. 145-155 ◽

Cited By ~ 21

Author(s):

Y. He ◽

A. Javaid ◽

E. Essadiqi ◽

M. Shehata

Keyword(s):

Numerical Simulation ◽

Experimental Study ◽

Mg Alloy ◽

Alloy Casting ◽

Az31 Mg Alloy

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Bulimia nervosa: treatment and short-term outcome

Psychological Medicine ◽

10.1017/s0033291700002543 ◽

1986 ◽

Vol 16 (1) ◽

pp. 65-70 ◽

Cited By ~ 62

Author(s):

L. K. George Hsu ◽

Diane Holder

Keyword(s):

Treatment Outcome ◽

Bulimia Nervosa ◽

Response To Treatment ◽

Dropping Out ◽

Methodological Issues ◽

Short Term ◽

Term Outcome ◽

Short Term Outcome ◽

Duration Of Illness ◽

One Year

SynopsisFifty-six bulimia nervosa patients were treated by means of a behavioural approach and followed for at least one year after completion or dropping out of treatment. Outcome was encouraging in about half of the patients and several psychiatric indicators, such as duration of illness and response to treatment, were identified. The significance of the findings and unresolved methodological issues are discussed.

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Oxide scale behavior of Al–7.5 mass%Mg alloy containing trace Ca during short-term oxidation

Materials Express ◽

10.1166/mex.2021.2090 ◽

2021 ◽

Vol 11 (11) ◽

pp. 1881-1886

Author(s):

Seong-Ho Ha ◽

Young-Ok Yoon ◽

Bong-Hwan Kim ◽

Hyun-Kyu Lim ◽

Sung-Hwan Lim ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Oxide Film ◽

Phase Diagrams ◽

Film Formation ◽

Mg Alloy ◽

Short Term ◽

Spinel Formation ◽

Transmission Electron ◽

Significant Difference

In this study, using transmission electron microscopy and phase diagrams from thermodynamic calculations, we investigated the oxide film formation of Al–7.5 mass%Mg alloy containing Ca traces during short-term oxidation in terms of the thermodynamic stability and multi-element oxides by inter-diffusion based on the results of analysis for the oxide film. For the oxidation test at 515 ˚C, for 1 h, its results showed that there is no significant difference between the Ca-added and Ca-free Al–7.5 mass%Mg alloys was observed, while further exposure caused the Ca-free alloy to gain significant weight. Based on the standard Gibbs free energy for oxide production calculated in this study, CaO was the most preferential product among the single metal oxides examined. As per calculations for MgAl2O4-spinel formation reactions, the spinel formation from MgO was thermodynamically the most favorable. According to the phase diagrams calculated in this study, various multi-element oxides including Ca could possibly form in the oxide layer of Ca-added alloy. The analysis results of transmission electron microscopy confirmed that MgO is the primary oxide in the Al–Mg binary alloys. In oxidation tests conducted for less than 1 h, the spinel was rarely found. The outmost areas of oxide layers correspond to MgO and CaO in Ca-free and Ca-added alloys, respectively. However, in the Ca-added alloy, the inner layer contains certain amounts of Ca, Al, and Mg.

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