Anisotropic Behavior of Al1050 through Accumulative Roll Bonding

Area of Science:

• Materials Science
• Mechanical Engineering
• Metallurgy

Background:

• Aluminum alloy 1050 is widely used.
• The accumulative roll bonding (ARB) technique is a method for enhancing material properties.
• Understanding the mechanical behavior and texture evolution of ARB-processed materials is crucial.

Purpose of the Study:

• To investigate the effects of accumulative roll bonding (ARB) on the mechanical properties and texture of Al1050 sheets.
• To analyze the anisotropy development during the ARB process.
• To characterize the fracture mechanisms of ARB-processed Al1050.

Main Methods:

• Fabrication of Al1050 sheets using five passes of the accumulative roll bonding (ARB) technique.
• Mechanical testing including uniaxial tensile tests and Vickers microhardness tests.
• Microstructural analysis using fractography and X-ray diffraction (XRD) for texture analysis.

Main Results:

• Tensile strength increased five-fold from 50 MPa (annealed) to 250 MPa (fifth pass).
• Elongation increased by approximately 50% in the annealed sample compared to the fifth pass.
• Hardness increased by 1.8 times, from 39 HV (annealed) to 68 HV (fifth pass).
• Normal anisotropy increased from 0.6 (annealed) to 1.8 (fifth pass), indicating a significant rise in anisotropic behavior.

Conclusions:

• The accumulative roll bonding (ARB) process effectively enhances the strength and hardness of Al1050 sheets.
• ARB processing leads to a notable increase in the material's anisotropy.
• The study provides insights into the mechanical behavior, fracture mechanisms, and texture evolution of ARB-processed aluminum.