oer journal
effects_of_casting_speed_and_runner_angle_on_macrosegregation_of_aluminium-copper_alloy

EFFECTS OF CASTING SPEED AND RUNNER ANGLE ON MACROSEGREGATION OF ALUMINIUM-COPPER ALLOY

Dr Obasa Victoria Dumebi and Victoria Dumebi Obiekea, Israel Olatunde Sekunowo, Mike Gbeminiyi Sobamowo and Samson Oluropo Adeosun   (Published 2018)

Dr Victoria Dumebi
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Abstract

During the solidification of binary metal alloys, chemical heterogeneities at
product scale over a long distance range (1cm-1m) develop and this has detrimental
effect on the resulting mechanical properties of cast products. Macrosegregation is
of great concern to alloy manufacturers and end users as this problem persist. In
this study, the use of process parameters namely casting speed and runner angle to
reduce macro-segregation in aluminum-copper binary alloy solidification is
reported. The results from optical microscope, scanning electron microscope and
energy dispersive spectrometry show that these parameters significantly influenced
the development, size and volume of macrosegregation. The combination of
parameters namely the pouring height between 96 mm/s, 100mm/s, and runner
angles between 1200, 1500 produced less segregations with improved mechanical
properties within standard specification. The modulus of elasticity (6800 MPa),
tensile strength (110 MPa) and 2.5 % elongation obtained in this study are within
standard 7100 MPa, (88- 124 MPa) and (1-25 %) respectively for this class of
alloy.

 

Item Type: Journal article(non-copyrighted)
Format: PDF document,   851.17 KB
Copyright: Creative Commons LicenseCreative Commons license
Keywords: Binary Alloy, Casting Speed, Macro-Segregation, Mechanical Property, Runner Angle
Department: Mechanical Engineering
Field of Study: Engineering- Mechanical
Uploaded By: Chukwuemeka Obasi Chijioke
Date Added: 12 Jan 2022 12:56pm
Last Modified: 12 Jan 2022
Journal URL: https://www.edouniversity.edu.ng/oer/journal/effects_of_casting_speed_and_runner_angle_on_macrosegregation_of_aluminium-copper_alloy

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