Simulation of equal channel angular pressing applied to produce structures with ultrafine-sized grains

Date

2009-01-01

Author

Karpuz, Pinar
Şimşir, Caner
Gür, Cemil Hakan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

265
views

0
downloads

Severe plastic deformation methods are of great interest in industrial forming applications, as they give rise to significant refinement in microstructures and improvements in mechanical and physical properties. In the 'equal channel angular pressing (ECAP)', which is the most common method for production of ultrafine grained bulk samples, very high plastic strains are introduced into the bulk material without any change in cross section. In this study, the plastic deformation behaviour of the materials subjected to ECAP was analysed by modelling the process with Msc.Marc finite element software. Various numerical experiments were carried out for the die angles of 90°, 120° and 150°, different friction conditions, and different round corners. To simplify the problem, plane strain condition and an isothermal system was assumed. Auto-remeshing was applied when the strains reached to very large values. The numerical results are in good agreement with those of the theoretical studies and data in literature.

Subject Keywords

General Materials Science

URI

https://hdl.handle.net/11511/51607

Journal

International Journal of Microstructure and Materials Properties

DOI

https://doi.org/10.1504/ijmmp.2009.031141

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Investigation of as-quenched and tempered commercial steels by Magnetic Barkhausen Noise method Gür, Cemil Hakan; Çam, İbrahim (Inderscience Publishers, 2006-01-01) This study aims to characterise as-quenched and tempered steels by the Magnetic Barkhausen Noise method, and to contribute to optimisation of heat treatment processes. Identical austenitisation and quenching procedures were applied to SAE 1040 and SAE 4140 specimens to eliminate the effect of grain size. Samples were tempered at 200°C and 600°C for 2 hours. Microstructures were characterised by metallographic examinations and hardness measurements. Amplitude, position and frequency spectrum of signals were ...
Poly(hydridocarbyne) as Highly Processable Insulating Polymer Precursor to Micro/Nanostructures and Graphite Conductors Katzenmeyer, Aaron M.; Bayam, Yavuz; Logeeswaran, V. J.; Pitcher, Michael W.; Nur, Yusuf; Seyyidoglu, Semih; Toppare, Levent Kamil; Talin, A. Alec; Han, Huilan; Davis, Cristina E.; Islam, M. Saif (Hindawi Limited, 2009-01-01) Carbon-based electronic materials have received much attention since the discovery and elucidation of the properties of the nanotube, fullerene allotropes, and conducting polymers. Amorphous carbon, graphite, graphene, and diamond have also been the topics of intensive research. In accordance with this interest, we herein provide the details of a novel and facile method for synthesis of poly(hydridocarbyne) (PHC), a preceramic carbon polymer reported to undergo a conversion to diamond-like carbon (DLC) upon...
A new framework for simulation of heat treatments Şimşir, Caner; Gür, Cemil Hakan (Inderscience Publishers, 2010-12-01) In this study, a mathematical framework based on finite element method (FEM) capable of predicting temperature history, evolution of phases and internal stresses during thermal treatment of metals and alloys was developed. The model was integrated into the commercial FEA software MSC.Marc® by user subroutines. The accuracy of the model was verified by simulating the quenching of eccentrically drilled steel cylinders. Simulation results were justified via SEM observations and XRD residual stress measurements.
Ambient synthesis of nanomaterials by in situ heterogeneous metal/ligand reactions Chang, Boyce S.; Thomas, Brijith; Chen, Jiahao; Tevis, Ian D.; Karanja, Paul; Çınar, Simge; Venkatesh, Amrit; Rossini, Aaron J.; Thuo, Martin M. (Royal Society of Chemistry (RSC), 2019-08-07) Coordination polymers are ideal synthons in creating high aspect ratio nanostructures, however, conventional synthetic methods are often restricted to batch-wise and costly processes. Herein, we demonstrate a non-traditional, frugal approach to synthesize 1D coordination polymers by in situ etching of zerovalent metal particle precursors. This procedure is denoted as the heterogeneous metal/ligand reaction and was demonstrated on Group 13 metals as a proof of concept. Simple carboxylic acids supply the etch...
Investigating the effects of hardening of aluminium alloys on equal-channel angular pressing-A finite-element study Karpuz, P.; Simsir, C.; Gür, Cemil Hakan (Elsevier BV, 2009-03-15) Equal-channel angular pressing (ECAP) is a promising severe plastic deformation method for production of ultrafine-grained bulk metals and alloys with considerably improved mechanical properties. In this study, numerical experiments were carried out to investigate the effect of strain hardening of aluminum alloys on the process performance of ECAP via finite element modeling. In the constitutive model, isothermal-plane strain, frictionless condition was assumed. The numerical results showed that strain hard...

Citation Formats

P. Karpuz, C. Şimşir, and C. H. Gür, “Simulation of equal channel angular pressing applied to produce structures with ultrafine-sized grains,” International Journal of Microstructure and Materials Properties, pp. 356–367, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51607.