About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Heterostructured and Gradient Materials (HGM V): New Mechanistic Discoveries Enabling Superior Properties
|
Presentation Title |
Significant Bauschinger Effect and Back Stress Strengthening in an Ultrafine Grained Pure Aluminum Fabricated by Severe Plastic Deformation Process |
Author(s) |
Nobuhiro Tsuji, Si Gao, Kota Yoshino, Daisuke Terada, Yoshihisa Kaneko |
On-Site Speaker (Planned) |
Nobuhiro Tsuji |
Abstract Scope |
Bauschinger test in uniaxial tension-compression mode was carried out for the first time on the pure Al specimens having homogeneous ultra-fine grained (UFG) microstructures fabricated by equal-channel an- gular pressing (ECAP) and subsequent annealing processes. Significant Bauschinger stress (transient soft- ening), Bauschinger energy parameter and their strong dependences on the tensile plastic pre-strain at the very early stage of the tensile deformation were measured in the UFG specimens, in sharp contrast to their coarse-grained (CG) counterpart. The grain size dependence of the Bauschinger effect in pure Al was qualitatively discussed in terms of the back stress arising from the formation of dislocation pile-up against the grain boundary during plastic deformation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Mechanical Properties, |