Microstructure and mechanical properties of Al-1050 during incremental ECAP

M Salamati,S Moturu,S Tamimi,A Rosochowski,G Sivaswamy,M Qarni

doi:10.1088/1757-899x/194/1/012009

M Salamati, S Moturu + Show 4 more

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https://doi.org/10.1088/1757-899x/194/1/012009

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Abstract

Incremental ECAP is a new method of ECAP process were the severe shear deformation is incrementally applied on the sample resulting in grain refining and new texture developing. The fundamental objective of the present work is an observation of effect of different passes of I-ECAP on microstructure and mechanical properties of AA1050 billet. To that end, 8 pass of I-ECAP have been carried out using Bc route and microstructure evolution and mechanical properties of the I-ECAPed samples have been studied. The EBSD and TEM analyses indicates that I-ECAP is as capable as conventional ECAP to grain refinements and a UFG structure is resulted after I-ECAP cycles. Tensile testing and hardness measurements indicates that mechanical properties of the Al-1050 billets increases dramatically by increasing the I-ECAP passes.

Highlights

Severe plastic deformation (SPD) is one of the metal forming processes used to obtain ultrafine grained (UFG) structure [1,2,3]
The EBSD and transmission electron microscopy (TEM) analyses indicates that I-equal channel angular pressing (ECAP) is as capable as conventional ECAP to grain refinements and a UFG structure is resulted after incremental equal channel angular pressing (I-ECAP) cycles
This paper systematically examines the mechanical properties, microstructure of multiple passes I-ECAP samples, with the channel intersection angle φ=90°

Summary

Introduction

Severe plastic deformation (SPD) is one of the metal forming processes used to obtain ultrafine grained (UFG) structure (below 1 micron) [1,2,3]. Various SPD processes exist but the equal channel angular pressing (ECAP) is one of the few methods that can produce UFG billets for industrial scale applications [4,5,6]. Segal and his co-workers [7, 8] were the first researchers to study this method. This method induces large shear strain in the billet material by passing it repeatedly through the two channel intersect at an angle φ=90°, and have equal cross-sections. This paper systematically examines the mechanical properties, microstructure of multiple passes I-ECAP samples, with the channel intersection angle φ=90°

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