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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12600
Title: A Comparative Study on Tensile and Fracture Behavior of Al–Mg Alloy Processed Through Cryorolling and Cryo Groove Rolling
Authors: Yogesha K.K.
Kumar N.
Joshi A.
Jayaganthan R.
Nath S.K.
Published in: Metallography, Microstructure, and Analysis
Abstract: In the present work, Al–Mg alloy (AA 5052) was subjected to cryorolling followed by post-deformation annealing, in order to investigate its effect on tensile and fracture behavior. The solution-treated Al alloys were cryorolled (CR) and cryo groove rolled to different true strains. The microstructure of the samples (deformed and post-annealed) was characterized by optical microscopy, x-ray diffraction, and TEM to substantiate the mechanisms of grain refinement and its influence on tensile and fracture properties. Fractography of the tensile as well as three-point bending test samples was carried out using a scanning electron microscope (SEM) to reveal the fracture mode. The deformed samples (90% thickness reduction) exhibit significant improvement in strength (291 MPa) and hardness (110 HV) in CR samples and 313 MPa and 122 HV in cryo groove rolled samples, which is due to high dislocation density and grain size reduction. Post-annealing of the deformed samples (90% thickness reduction) led to improvement in its ductility as well as fracture toughness. The cryo groove rolled samples and post-annealed samples have shown better fracture toughness (142 kJ/m2) as compared to cryo rolled samples (29 kJ/m2) due to the relatively larger grain and dimples as observed from TEM and fractography studies. © 2016, Springer Science+Business Media New York and ASM International.
Citation: Metallography, Microstructure, and Analysis (2016), 5(3): 251-263
URI: https://doi.org/10.1007/s13632-016-0282-0
http://repository.iitr.ac.in/handle/123456789/12600
Issue Date: 2016
Publisher: Springer New York LLC
Keywords: Fractography
Fracture strength
Groove rolling
Microstructure
ISSN: 21929262
Author Scopus IDs: 57189386813
57201756182
57189378160
6602183770
7102759700
Author Affiliations: Yogesha, K.K., Department of Metallurgical and Materials Engineering & Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Kumar, N., Department of Metallurgical and Materials Engineering & Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Joshi, A., Department of Metallurgical and Materials Engineering & Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Jayaganthan, R., Department of Metallurgical and Materials Engineering & Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India, Department of Engineering Design, Indian Institute of Technology Madras, Chennai, 600036, India
Nath, S.K., Department of Metallurgical and Materials Engineering & Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Corresponding Author: Jayaganthan, R.; Department of Metallurgical and Materials Engineering & Centre of Nanotechnology, Indian Institute of Technology RoorkeeIndia; email: rjayafmt@iitr.ernet.in
Appears in Collections:Journal Publications [MT]

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