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Deformation Mechanism in Single Point Incremental Forming (SPIF) and Significance of Crystallographic Texture in Sheet Metal Forming Operations
Published in Kakandikar Ganesh Marotrao, Anupam Agrawal, D. Ravi Kumar, Metal Forming Processes, 2023
Analysis of aluminium sheet microstructures evolved during conventional forming reports the presence of dominant beta fibers consisting of dominant Cube, Goss, S, Brass, and Copper texture components (Barnwal et al. 2018). Fang et al. (2017) analyzed the microstructural differences that resulted post conventional and electromagnetic pulse assisted incremental drawing of 5052 aluminium alloy. They have correlated the formability of the parts with resulted grains and formed slip bands. Shore et al. (2018) claimed that asymmetric rolling of sheet introduces shear components and thus, crystallographic texture of the formed sheet alters. Evolved textures during single pass of asymmetric cold rolling were investigated to analyze the effect on macroscopic anisotropy of the sheet material. They further successfully established the relationship between volume fractions of shear texture, texture heterogeneity and plastic anisotropy behavior. Satheesh Kumar and Raghu (2015) had performed conventional and cross constrained groove pressing (CGP) technique. They confirmed the influence of strain path change on the dislocation interactions and evolution of boundary characteristics. Further, development of misorientation distribution was correlated with grain refinement during forming. Thus, to analyze the deformation and forming behavior of SPIF from the core, there is a need to investigate the sheets deformation at the microstructural level.
Effect of sodium octanoate on the tribocorrosion behaviour of 5052 aluminium alloy
Published in Tribology - Materials, Surfaces & Interfaces, 2018
Hongjin Zhao, Lei Cao, Yong Wan, Jibin Pu
Some inorganic and organic inhibitors, such as rare-earth compounds [16,17], 1,4-naphthoquinone [18], sodium decanoate [19] are added as the corrosion-inhibitors to reduce the corrosion of aluminium. Among them, salt of monocarboxylic acids is environmentally friendly and known to prevent corrosion for various metals [19–22]. However, there are few papers available which deal with the effects of alkyl carboxylates on tribocorrosion behaviour of aluminium in corrosive media containing Cl− ions. In this work, the effect of sodium octanoate on tribocorrosion behaviour of 5052 aluminium alloy (AA5052) sliding against an alumina ball in 0.5 M NaCl solution have been investigated by measuring the coefficients of friction, the electrochemical response and total metal losses. The experiments have been conducted under potentiostatic conditions at a wide range of potentials to study the effect of applied electrochemical potentials on frictional and wear behaviour of AA5052. The overall tribocorrosion behaviour is discussed.