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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13105
Title: Ultrafine-grained steel fabricated using warm multiaxial forging: Microstructure and mechanical properties
Authors: Padap A.K.
Chaudhari G.P.
Nath S.K.
Pancholi V.
Published in: Materials Science and Engineering A
Abstract: Grain refinement of bulk metals using severe plastic deformation (SPD) is a popular approach to improve both strength and toughness. In this paper, grain refinement of steel processed by warm multiaxial forging (MAF) and its mechanical behavior has been investigated. Coarse-grained, plain low carbon steel was deformed using MAF at 500 °C. Microstructural evolution is characterized using electron backscattered diffraction and mechanical behavior has been studied. Fraction of low angle grain boundaries (LAB) is observed to increase with strain up to total engineering strain of 1.3 thereafter it starts decreasing whereas, high angle grain boundaries showed just the opposite trend. It appears that initially grain subdivision takes place with imposition of strain thereby increasing the fraction of LAB. After a critical strain these LAB transforms into the high angle boundaries (HAB). The initial coarser grains of average 30 μm size subdivided into grains of the size finer than 0.5 μm. This has been confirmed by TEM micrographs. Improved tensile strengths and hardness values are obtained after warm MAF. © 2009 Elsevier B.V. All rights reserved.
Citation: Materials Science and Engineering A (2009), 527(43832): 110-117
URI: https://doi.org/10.1016/j.msea.2009.08.066
http://repository.iitr.ac.in/handle/123456789/13105
Issue Date: 2009
Keywords: Grain refinement
Multiaxial forging
Severe plastic deformation
Steel
ISSN: 9215093
Author Scopus IDs: 35219211300
6603871115
7102759700
14071738800
Author Affiliations: Padap, A.K., Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India
Chaudhari, G.P., Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India
Nath, S.K., Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India
Pancholi, V., Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India
Corresponding Author: Chaudhari, G.P.; Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India; email: chaudfmt@iitr.ernet.in
Appears in Collections:Journal Publications [MT]

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