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Forming limit diagram and void coalescence analysis of AA5052 coated with molybdenum-based ceramic nanocomposites
Highlights Ceramic nanocomposite was coated using sputtering process. Studies on fracture using double edge notch tensile geometry. Adiabatic shear deformation are analyzed during tension. The void coalescence analysis of ceramic nanocomposite carried. Potential application in TBC in automobile, aerospace industries, etc.
Abstract Aluminium 5052 alloy sheets of size 75×25mm and 3mm thickness with double edge semicircular notches of diameter from 2–8mm have been coated with MoSi2–SiC nanocomposite coatings by sputtering process. The structural morphology of the ceramic coatings was explored by Fourier Transform Infrared (FT-IR) spectroscopy, X-ray Diffraction (XRD) analysis, Scanning Electron Microscopy (SEM), and Atomic Force Microscopy (AFM). The coated and uncoated sheet samples were subjected to tension–compression state of strain up to fracture by varying the notch sizes using INSTRON Universal Testing Machine (UTM). Fracture behaviour studies of the sheets were performed and forming limit diagram (FLD) was drawn. The void coalescence analysis was also carried out by using SEM images and the effect of coating behaviour of combined forming and fracture were analyzed. In the coated sheet, the L/W ratio was very close to 1.0. Thus, no oblate/prolate voids were observed and the heat generated during deformation was retained for longer time and thereby adiabatic shear band formation has occurred with increased formability.
Forming limit diagram and void coalescence analysis of AA5052 coated with molybdenum-based ceramic nanocomposites
Highlights Ceramic nanocomposite was coated using sputtering process. Studies on fracture using double edge notch tensile geometry. Adiabatic shear deformation are analyzed during tension. The void coalescence analysis of ceramic nanocomposite carried. Potential application in TBC in automobile, aerospace industries, etc.
Abstract Aluminium 5052 alloy sheets of size 75×25mm and 3mm thickness with double edge semicircular notches of diameter from 2–8mm have been coated with MoSi2–SiC nanocomposite coatings by sputtering process. The structural morphology of the ceramic coatings was explored by Fourier Transform Infrared (FT-IR) spectroscopy, X-ray Diffraction (XRD) analysis, Scanning Electron Microscopy (SEM), and Atomic Force Microscopy (AFM). The coated and uncoated sheet samples were subjected to tension–compression state of strain up to fracture by varying the notch sizes using INSTRON Universal Testing Machine (UTM). Fracture behaviour studies of the sheets were performed and forming limit diagram (FLD) was drawn. The void coalescence analysis was also carried out by using SEM images and the effect of coating behaviour of combined forming and fracture were analyzed. In the coated sheet, the L/W ratio was very close to 1.0. Thus, no oblate/prolate voids were observed and the heat generated during deformation was retained for longer time and thereby adiabatic shear band formation has occurred with increased formability.
Forming limit diagram and void coalescence analysis of AA5052 coated with molybdenum-based ceramic nanocomposites
Selvakumar, N. (author) / Jinnah Sheik Mohamed, M. (author) / Narayanasamy, R. (author) / Venkateswarlu, K. (author)
2013-05-16
11 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2013
| British Library Online Contents | 2013
| British Library Online Contents | 2013
| British Library Online Contents | 2013
Forming limit diagram prediction of AA5052/polyethylene/AA5052 sandwich sheets
| British Library Online Contents | 2013