Effects of severe plastic deformation on the corrosion behavior of aluminum alloys

Aluminum and its alloys are widely used as structural materials in aerospace, automotive and other industries due to low density and high specific strength. Efficient way to increase strength and other properties of aluminum alloys is to form an ultra fine grain structure using severe plastic deformation methods. Cryogenic asymmetric sheet rolling under liquid nitrogen temperature is a process of severe plastic deformation that can be used to improve the aluminum alloys structure and properties. Prediction of sheet temperature during plastic deformation is very important. The temperature of sheet is changed due to the conversion of mechanical work of deformation into heat through sliding on contact surfaces. This paper presents the results of the finite element simulation of heat transfer during cryogenic asymmetric sheet rolling of aluminum alloy 6061. The effect of thickness reduction, rolling velocity and friction coefficient on the deformation heating and temperature field of aluminum alloy 6061 was found. The results of investigation could be useful for the development of the optimal treatment process of aluminum alloys by cryogenic severe plastic deformation to obtain the ultra fine grain structure and high strength properties.

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Superstrength of ultrafine-grained aluminum alloys produced by severe plastic deformation

Doklady Physics ◽

10.1134/s1028335810060054 ◽

2010 ◽

Vol 55 (6) ◽

pp. 267-270 ◽

Cited By ~ 21

Author(s):

R. Z. Valiev ◽

N. A. Enikeev ◽

M. Yu. Murashkin ◽

S. E. Aleksandrov ◽

R. V. Goldshtein

Keyword(s):

Plastic Deformation ◽

Aluminum Alloys ◽

Severe Plastic Deformation ◽

Ultrafine Grained

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Investigation of tribotechnical and corrosion behaviour of material for light-alloy drill pipes

Arctic Environmental Research ◽

10.17238/issn2541-8416.2018.18.1.21 ◽

2018 ◽

Vol 18 (1) ◽

pp. 21-27

Author(s):

Alina I. Shakirova ◽

Rustem A. Ismakov ◽

Akhtyam Kh. Agliullin ◽

Nikolai K. Tsenev

Keyword(s):

Plastic Deformation ◽

Aluminum Alloys ◽

Severe Plastic Deformation ◽

Sliding Friction ◽

Corrosion Behaviour ◽

High Strength ◽

The Arctic ◽

Light Alloy ◽

Pipe Surface ◽

Drill Pipes

Special aluminum alloys appear to be promising materials for manufacture of high-strength light-alloy drill pipes (HSLADP) that can be used in areas with a severe climate and challenging geology. The effect of using light-alloy drill pipes (LADP) depends directly on the properties of the aluminum alloys from which such pipes are made. As the wells become deeper and horizontal wellbores get longer, use of LADPs becomes more relevant. Since light-alloy pipes are 2.8 times softer than steel pipes, LADPs offer the same performance as steel drill pipes of the lowest strength grade even in the case of rotary drilling. The materials from which such pipes are made have a number of unique advantages: extra light weight in the drill mud, allowing the coefficient of sliding friction between the pipe surface and the borehole wall to be reduced; high corrosion resistance in aggressive media with A high concentration of hydrogen sulfide and carbon dioxide; and high magnetic inductive capacity that allows LADPs to be used as a housing for MWD (measurement while drilling) and LWD (logging while drilling) telemetry systems during well-drilling operations. This study suggests methods for industrial production of submicrocrystalline (SMC) structure in aluminum alloys with the help of severe plastic deformation. Through the example of model aluminum-lithium alloys 1420 (Al-Mg-Li-Zr) and 1460 (Al-Сu-Li-Zr), the researchers demonstrate that SMC structure helps significantly increase resistance to wear and reduce the rate of corrosion depending on the pH value. The research team also states that severe plastic deformation methods may be used to develop highly promising technologies for manufacture of high-strength LADPs with advanced strain-stress properties for use during operations in the Arctic.

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Structural changes in aluminum alloys upon severe plastic deformation

Physics of the Solid State ◽

10.1134/s1063783407050113 ◽

2007 ◽

Vol 49 (5) ◽

pp. 868-873 ◽

Cited By ~ 14

Author(s):

A. A. Mazilkin ◽

B. B. Straumal ◽

S. G. Protasova ◽

O. A. Kogtenkova ◽

R. Z. Valiev

Keyword(s):

Plastic Deformation ◽

Aluminum Alloys ◽

Severe Plastic Deformation ◽

Structural Changes

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Correlation Coefficient between Vickers Hardness and Nuclear Technique

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.344.129 ◽

2013 ◽

Vol 344 ◽

pp. 129-136

Author(s):

Emad A. Badawi ◽

M.A. Abdel-Rahman ◽

Alaa El-Deen A. El-Nahhas

Keyword(s):

Plastic Deformation ◽

Aluminum Alloys ◽

Severe Plastic Deformation ◽

Positron Annihilation ◽

Correlation Coefficient ◽

Vickers Hardness ◽

Positron Annihilation Spectroscopy ◽

Age Hardening ◽

Nuclear Technique ◽

Positron Annihilation Lifetime

The aim of this work is to establish a correlation coefficient between the positron annihilation lifetime technique (PALS) and the Vickers hardness for the heat treatable aluminum alloys (6066, 6063).The potential of positron annihilation spectroscopy in the study of light alloys is illustrated with special regards to age hardening, severe plastic deformation, annealing and quenching in aluminum alloys. Vickers hardness is the standard method for measuring the hardness of metals, particularly those with extremely hard surfaces. Accordingly, a correlation coefficient of 90 % between τ and Hv is obtained. This correlation can help us to explain many behaviors of these alloys under deferent conditions.

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