Microhardness Characteristics of Al-6063 Alloy Processed by Equal Channel Angular Extrusion

In this study, annealed AL-6063 alloy was processed by the Equal Channel Angular Extrusion (ECAE) up to 6 passes at a temperature of 200°c following route A with a constant ram speed of 30 mm/min through a die angle of 90° between the die channels. The influence of ECAE processing on the evolution of microhardness in the material was studied using Vickers microhardness testing. The detailed analysis was carried out on the samples of as-received, one, two, three, four, five, and six pass conditions. The grain diameter reduced from 45μm to 2.8 μm after 6 passes of ECAE. The results indicated around 90% increase in Microhardness after 5 passes. Hardness of the inner surface where the billet was under compression was slightly higher than that of the mid-surface.

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Experimental Study of Impact Strength of Al-6063 Alloy Processed by Equal Channel Angular Extrusion

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.911.158 ◽

2014 ◽

Vol 911 ◽

pp. 158-162 ◽

Cited By ~ 1

Author(s):

Shamsuddin Sulaiman ◽

J. Nemati ◽

Hani Mizhir Magid ◽

B.T.H.T. Baharudin ◽

G.H. Majzoobi ◽

...

Keyword(s):

Impact Strength ◽

Equal Channel Angular Extrusion ◽

Split Hopkinson Pressure Bar ◽

Hopkinson Pressure Bar ◽

Angular Extrusion ◽

Split Hopkinson ◽

Ram Speed ◽

Pressure Bar ◽

The Impact ◽

Strength Improvement

In the present study, the impact strength of annealed Al-6063 alloy developed by equal channel angular extrusion (ECAE), up to 6 passes at a temperature of 200°C following route A with a constant ram speed of 30 mm/min through a die angle of 90° between the die channels was investigated. The impact strength of extruded specimens is evaluated for different passes at a strain rate of 1800 s-1 using Split-Hopkinson pressure bar techniques. The results indicate that the major strength improvement occurs in the 5th and 6th passes while in primary passes, the strength improved but at a considerably lower rate. A total increasing in ultimate strength (UTS) and yield strength (YS) are 127% and 65% respectively and observed for the extruded material after 6 passes. Optical microscopic examinations show a grain refinement from 45 μm to 2.8 μm.

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Finite Element Study of Deformation Behaviour of Al-6063 Alloy Developed by Equal Channel Angular Extrusion

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1043.119 ◽

2014 ◽

Vol 1043 ◽

pp. 119-123

Author(s):

J. Nemati ◽

S. Sulaiman ◽

G.H. Majzoobi ◽

B.T.H.T. Baharudin ◽

M.A. Azmah Hanim

Keyword(s):

Finite Element ◽

Equal Channel Angular Extrusion ◽

Deformation Behaviour ◽

Three Dimensional ◽

Equivalent Plastic Strain ◽

Fine Mesh ◽

Element Size ◽

Angular Extrusion ◽

Ram Speed ◽

3D Software

The objective of this work is to evaluate the equivalent plastic strain levels induced by equal channel angular extrusion (ECAE) in an annealed Al-6063 alloy after six passes at a temperature of 200°C following route A with a constant ram speed of 30 mm/min through a die angle of 90° between the die channels using the finite element method (FEM). ECAE process is simulated using the DEFORM-3D software through a three-dimensional analysis. Grain refinement is simulated by forcing the element size to zero. It is found that for a very fine mesh the PEEQ converges to 1.046.

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Improving the Accuracy of Low-load Vickers Microhardness Testing of Hard Thin Films

Procedia Technology ◽

10.1016/j.protcy.2013.12.488 ◽

2014 ◽

Vol 12 ◽

pp. 289-294 ◽

Cited By ~ 5

Author(s):

Gabriela Strnad ◽

Laszlo Jakab-Farkas

Keyword(s):

Thin Films ◽

Vickers Microhardness ◽

Low Load ◽

Microhardness Testing ◽

Vickers Microhardness Testing

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Analysis of indentation size effect (ISE) behavior in low-load Vickers microhardness testing of (Sm123)1−x(Nd123)x superconductor system

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-013-1082-9 ◽

2013 ◽

Vol 24 (7) ◽

pp. 2218-2227 ◽

Cited By ~ 7

Author(s):

S. Celik ◽

O. Ozturk ◽

E. Coşkun ◽

M. Sarıhan ◽

E. Asikuzun ◽

...

Keyword(s):

Size Effect ◽

Vickers Microhardness ◽

Indentation Size Effect ◽

Indentation Size ◽

Low Load ◽

Microhardness Testing ◽

Vickers Microhardness Testing

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Microhardness evolution of pure titanium deformed by equal channel angular extrusion

Metallurgical Research & Technology ◽

10.1051/metal/2018135 ◽

2019 ◽

Vol 116 (4) ◽

pp. 408 ◽

Cited By ~ 4

Author(s):

Shokouh Attarilar ◽

Mohammad-Taghi Salehi ◽

Faramarz Djavanroodi

Keyword(s):

Vickers Microhardness ◽

Equal Channel Angular Extrusion ◽

Pure Titanium ◽

Processing Temperature ◽

Cross Sectional ◽

Commercial Pure Titanium ◽

Angular Extrusion ◽

Suitable Amount ◽

Sectional Plane ◽

The One

Microhardness homogeneity was assessed on commercial pure titanium processed by equal channel angular extrusion (ECAE). The operation was performed with die channel angle of 90° and processing temperature of 450 °C by route BC up to six passes. The Vickers microhardness measurements were investigated on both cross-sectional and longitudinal planes of the annealed, one-, two-, four-, and six-pass ECAEed titanium. It was found that the application of the process and the addition of pass numbers lead to the improvement of hardness magnitude. It was shown that there are some areas of microhardness heterogeneity in surrounding and bottom regions of the one-pass and two-pass specimens at the cross-sectional plane which is slightly disappeared by adding the pass numbers. Furthermore, there is a suitable amount of hardness homogeneity in the longitudinal plane, irrespective of the specimen condition. It can be concluded that a desirable homogeneity of hardness can be attained after imposing six passes of ECAE process on both cross-sectional and longitudinal planes of titanium.

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