Extrusion die geometry effects on the energy absorbing properties and deformation response of 6063-type Al-Mg-Si alu1ninum alloy*

Gbenebor, O. P and Fayomi, O. S. I and Popoola, A. P. I. and Inegbenebor, A.O. and Oyawale, Fetus A (2013) Extrusion die geometry effects on the energy absorbing properties and deformation response of 6063-type Al-Mg-Si alu1ninum alloy*. Results In Physics, 3. pp. 1-6.

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Abstract

The response of 6063-type AI-Mg-Si alloy to deformation via extrusion was studied using tool steel dies with 15°,30°,45°,60° and 75o entry angles. Compressive loads were subjected to each sample using the AVERY DENISON machine, adapted to supply a compressive load on the punch. The ability of the extrudate to absorb energy before fracture was calculated by integrating numerically the polynomial relationship between the compressive stress and sarnple strains. Strain rate was calculated for each specimen and the deformation zone length w~s mathematically derived from the die geometry to decipher its influence on both lateral and axial deformations. Results shcv-1Ed that cxtntr:ling with a 15° die was the fastest as a result of the low flow ;.iress encountered. Outstanding compressive strer:gth. plastic deformation, strain rate and e:1e1gy absorl'inz ca1~acity were observed for the alloy extruded with a 75" di~> angle. Increase in die ;mgles led to a decreJ~;e in cleformJtion zone length and samples deformed more in the axial direction than in the lateral e>.cep~ for the 45° die which showed the opposite; the sample also showed the least ductility.

Item Type:	Article
Uncontrolled Keywords:	Strain rate Compressive srrcngth Deformation length zone Die angle Energy absor·bing property
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Hannah Akinwumi
Date Deposited:	14 Apr 2015 15:17
Last Modified:	14 Apr 2015 15:17
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/5001

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