Grain Structure Evolution and Mechanical Properties of Multi-Channel Spiral Twist Extruded AA5083

Metals

Mohamed M. Z. Ahmed¹  Ibrahim Albaijan¹  Waleed H. El-Garaihy²  Hanadi G. Salem³  Dina M. Fouad³  Mohamed M. El-Sayed Seleman⁴ 

[1] Mechanical Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Al Kharj 16273, Saudi Arabia;Mechanical Engineering Department, College of Engineering, Qassim University, Unsaizah 51911, Saudi Arabia;Mechanical Engineering Department, The American University in Cairo, Cairo 11835, Egypt;Metallurgical and Materials Engineering Department, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43511, Egypt;

关键词: multi-channel spiral twist extrusion;    severe plastic deformation;    electron back-scatter diffraction;    texture evolution;    structural evolution;    severe plastic deformation;   

DOI  :  10.3390/met11081276

来源: DOAJ

【 摘 要 】

This study presents a comprehensive evaluation of the effects of multi-channel spiral twist extrusion (MCSTE) processing on the mechanical properties and structural evolution of AA5083. The structural evolution and texture developed were mapped by electron backscatter diffraction (EBSD) for three successive passes and compared with an as-annealed plate. An evaluation of the hardness and tensile properties was presented and correlated with the EBSD findings. The displayed EBSD results revealed that grain refinement was strongly associated with the presence of a high density of low-angle grain boundaries (LAGBs) after one pass, which developed into fine grains of less than 20 μm and high-angle grain boundaries (HAGBs) after three MCSTE passes. The three pass processing led to a 65% reduction in grain size. This reduction in grain size was coupled with an enhancement in the hardness and tensile properties. Additionally, the crystallographic texture study represented a slightly random texture due to the presence of intermetallic particles in AA5083. This study demonstrates the efficacy of MCSTE as a grain refinement tool.

【 授权许可】

Unknown