Strain behavior of nickel alloy 200 during multiaxial forging through finite element modeling
File(s)
Published version
Author(s)
Djavanroodi, Faramarz
Type
Journal Article
Abstract
Multiaxial forging (MAF) is one of the appealing methods of severe plastic deformation (SPD) techniques to fabricate ultrafine-grained (UFG) materials. In this study; the influence of process parameters such as strain rate; friction; and initial temperature has been assessed through finite element simulation of Nickel 200 alloy. The Johnson–Cook equation was applied in simulating the MAF process. The homogeneous microstructure of a material processed by MAF is an important requirement to obtain uniform mechanical and other properties. The uniformity in properties was evaluated by the investigation of the hardness measurements; effective strain (ES), and inhomogeneous factor (IF) or coefficient of standard deviation. The results showed that the inhomogeneous factor decreases with an increase in strain rate and decrease in temperature. It was found that a more homogeneous structure is observed with an increasing number of MAF cycles and the strain rate strain. Furthermore; the average grain size reduced from 850 nm to 220 nm after three cycles of MAF. Finally; experimental work was performed to validate the results.
Date Issued
2019-01-29
Date Acceptance
2019-01-19
Citation
Metals, 2019, 9 (2), pp.1-12
ISSN
2075-4701
Publisher
MDPI
Start Page
1
End Page
12
Journal / Book Title
Metals
Volume
9
Issue
2
Copyright Statement
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000460764700023&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
finite element modeling
strain rate
multiaxial forging
Johnson-Cook model
strain analysis
inhomogeneity
ULTRAFINE-GRAINED MATERIALS
SEVERE PLASTIC-DEFORMATION
EQUAL-CHANNEL
MECHANICAL-PROPERTIES
DIE
MICROSTRUCTURE
COMPRESSION
HOMOGENEITY
EXTRUSION
ECAP
Publication Status
Published
Article Number
ARTN 132
Date Publish Online
2019-01-29