Investigation of Edge Cracking Propensity in Cold-Rolled Commercial Aluminium Alloy 8011 under Mixed Oil Lubrication Condition

Description

– Investigation of Edge Cracking Propensity in Cold-Rolled Commercial Aluminium Alloy 8011 under Mixed Oil Lubrication Condition –

Download Investigation of Edge Cracking Propensity in Cold-Rolled Commercial Aluminium Alloy 8011 under Mixed Oil Lubrication Condition. Metallurgical and Materials Engineering students who are writing their projects can get this material to aid their research work.

Abstract

The effect of iron content on edge cracking tendency in cold-rolled commercial aluminium alloy 8011 under a mixed coconut/diesel oil (factory formulated oil) lubrication condition and under neem seed oil as an alternative has been investigated.

Three different aluminium alloy plates each containing 0.708%Fe, 0.909%Fe and 0.931%Fe were produced by chill casting method. Seven samples each of dimension 240mm x 140mm x 7mm were cast per alloy.

As-received commercial aluminium alloy 8011 of 0.857%Fe was cut into seven samples of the same geometry. Experimentation involved cold reduction in thickness by rolling at various degrees of deformation, followed by testing of mechanical properties and qualitative metallographic analysis.

Performance evaluation of mixed coconut/diesel oil and neem seed oil lubricants in friction reduction of cold-rolled commercial AA 8011 and proportion of mixture of coconut and diesel oil that will give the highest percentage deformation were also conducted by plane strain compression test.

Introduction

The rolling of slab or sheet metals is probably one of the most advanced techniques among metal working processes due to its high productivity and close control of the final products.

The majority of the basic processes were invented during the second half of the 19^th century; since then, thousands of patents have been added which have improved the efficiency of the process or some part of the machinery used in the performance of the rolling operation (Schey, 1966).

Cold rolling process is one of the industrial practices employed in the manufacturing of plate, sheet, strip and foil products of aluminium and its alloys.

In spite of this very intensive activity, the problem of edge cracking which accompanies rolling process has not been completely resolved. Acceptable ways and means of preventing this defect is a challenge to commercial aluminium rolling operators.

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