Mechanical Properties and Microstructure Evolution of AA1100 Aluminum Sheet Processed by Accumulative Press Bonding Process

Abstract

Accumulative press bonding (APB) is a novel variant of severe plastic deformation processes, which is devised to produce materials with ultra-fine grain. In the present work, the mechanical properties and microstructural evolution of AA1100 alloy, which is produced by APB technique, were investigated. The study of the microstructure of AA1100 alloy was performed by optical microscopy. The results revealed that the grain size of the samples decreased to 950 nm after six passes of APB process. The yield strength of AA1100 alloy after six passes of the process increased up to 264 MPa, which is three times higher than that of the as-cast material (89 MPa). After six passes, microhardness values of AA1100 alloy increased from 38 to 61 HV. Furthermore, the results showed that the behavior of variations in mechanical properties is in accordance with the microstructural changes and it can be justified by using the Hall-Patch equation. Moreover, the rise in the yield strength can be attributed to the reduction in the grain size leading to the strain hardening.

Fabrication of a High Wear Resistance AA7075/AL2O3 Composites Via Liquid Metallurgy Process

“…As can be seen in Figs 2 and 3, the wear resistance of composite samples increases while these particles resist the cutting action of the rotating wear pin by increasing the Al2O3 content in low material removal from the pin surface. So, Al2O3 particles have an enhancement role on the wear resistance for all the applied loads in all experimental conditions and act as lubricant agents [12][13][14].…”

“…Significant progress in the development of light ALMCs has been made in recent years and as mentioned before, the composites have been introduced in many needed applications such as in the aerospace and automotive industry [8][9][10][11]. So, these kinds of composites have led to fabrication of tailorable engineering materials with durable and enhanced properties [12][13][14][15].…”

“…due to their desirable properties such as high coefficient of thermal expansion, high strength and high Young's modulus [1,2]. Many times in industries the need for a high performance tribological applications with a high wear-resistance is one of the major inducements for the technological development of aluminum matrix composites (ALMCs) [3,4].…”

“…Aluminum base matrix composites usually have an ideal structure for wear resistant materials due to being reinforced with hard particles dispersed through a relatively ductile matrix [5][6][7][8][9][10][11]. Significant progress in the development of light ALMCs has been made in recent years and as mentioned before, the composites have been introduced in many needed applications such as in the aerospace and automotive industry [8][9][10][11]. So, these kinds of composites have led to fabrication of tailorable engineering materials with durable and enhanced properties [12][13][14][15].…”

Microstructure, Texture, and Mechanical Properties of Alternate α/β Mg–Li Composite Sheets Prepared by Accumulative Roll Bonding

“…During ARB processing, the refinement strengthening and the strain hardening both happen in the composite sheets . The grain refinement improves the strength and elongation simultaneously.…”