Next Article in Journal
Chemical Degradation of a Mixture of tri-n-Octylamine and 1-Tridecanol in the Presence of Chromium(VI) in Acidic Sulfate Media
Next Article in Special Issue
On the Effect of Natural Aging Prior to Low Temperature ECAP of a High-Strength Aluminum Alloy
Previous Article in Journal
Numerical Simulation of Tensile Behavior of Corroded Aluminum Alloy 2024 T3 Considering the Hydrogen Embrittlement
Previous Article in Special Issue
Influence of Extrusion Temperature on the Aging Behavior and Mechanical Properties of an AA6060 Aluminum Alloy
Open AccessFeature PaperArticle

Strain Localization during Equal-Channel Angular Pressing Analyzed by Finite Element Simulations

1
Chair of Solid Mechanics, Chemnitz University of Technology, Reichenhainer Str. 70, D-09126 Chemnitz, Germany
2
Chair of Materials Science, Institute of Material Science and Engineering, Chemnitz University of Technology, Erfenschlager Str. 73, D-09125 Chemnitz, Germany
*
Author to whom correspondence should be addressed.
Metals 2018, 8(1), 55; https://doi.org/10.3390/met8010055
Received: 19 December 2017 / Revised: 6 January 2018 / Accepted: 8 January 2018 / Published: 15 January 2018
Equal-Channel Angular Pressing (ECAP) is a method used to introduce severe plastic deformation into a metallic billet without changing its geometry. In special cases, strain localization occurs and a pattern consisting of regions with high and low deformation (so-called shear and matrix bands) can emerge. This paper studies this phenomenon numerically adopting two-dimensional finite element simulations of one ECAP pass. The mechanical behavior of aluminum is modeled using phenomenological plasticity theory with isotropic or kinematic hardening. The effects of the two different strain hardening types are investigated numerically by systematic parameter studies: while isotropic hardening only causes minor fluctuations in the plastic strain fields, a material with high initial hardening rate and sufficient strain hardening capacity can exhibit pronounced localized deformation after ECAP. The corresponding finite element simulation results show a regular pattern of shear and matrix bands. This result is confirmed experimentally by ECAP-processing of AA6060 material in a severely cold worked condition, where microstructural analysis also reveals the formation of shear and matrix bands. Excellent agreement is found between the experimental and numerical results in terms of shear and matrix band width and length scale. The simulations provide additional insights regarding the evolution of the strain and stress states in shear and matrix bands. View Full-Text
Keywords: equal-channel angular pressing; ECAP; shear band; matrix band; kinematic hardening; FEM; strain localization equal-channel angular pressing; ECAP; shear band; matrix band; kinematic hardening; FEM; strain localization
Show Figures

Graphical abstract

MDPI and ACS Style

Horn, T.D.; Silbermann, C.B.; Frint, P.; Wagner, M.F.-X.; Ihlemann, J. Strain Localization during Equal-Channel Angular Pressing Analyzed by Finite Element Simulations. Metals 2018, 8, 55.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop