Grain refinement in AZ31 magnesium alloy rod fabricated by extrusion-shearing severe plastic deformation process

2011 ◽  
Vol 21 (2) ◽  
pp. 243-249 ◽  
Author(s):  
Hong-jun HU ◽  
Ding-fei ZHANG ◽  
Ming-bo YANG ◽  
Ming DENG
Keyword(s):  
Plastic Deformation ◽  
Magnesium Alloy ◽  
Severe Plastic Deformation ◽  
Grain Refinement ◽  
Deformation Process ◽  
Az31 Magnesium Alloy ◽  
Severe Plastic Deformation Process ◽  
Plastic Deformation Process

scholarly journals Deformation of Second Phase Particles in Al Alloy Using Severe Plastic Deformation Process

Materia Japan ◽  
2003 ◽  
Vol 42 (12) ◽  
pp. 863-863 ◽  
Author(s):  
Keiichiro Ohishi ◽  
Takeshi Fujita ◽  
Kunihiro Ohashi ◽  
Kenji Kaneko ◽  
Zenji Horita
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Deformation Process ◽  
Al Alloy ◽  
Second Phase ◽  
Severe Plastic Deformation Process ◽  
Plastic Deformation Process ◽  
Second Phase Particles

Upgrading Property of A-Fe Alloys through the Microstructure Refinement by Compressive Torsion Processing

2014 ◽  
Vol 794-796 ◽  
pp. 802-806 ◽  
Author(s):  
Yuji Kume ◽  
Shinichiro Ota ◽  
Makoto Kobashi ◽  
Naoyuki Kanetake
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Tensile Properties ◽  
Grain Refinement ◽  
Deformation Process ◽  
Room Temperature ◽  
Plastic Deformation Process ◽  
Deformation Processes ◽  
Alloy Microstructure ◽  
Fe Alloys

Cast AlFe alloys containing several percent iron have low ductility because of their brittle precipitates. Therefore, precipitate refinement is very important for improving their mechanical properties. In recent decades, severe plastic deformation processes have been developed to achieve this grain refinement. For example, our previously proposed severe plastic deformation process, called compressive torsion, is quite effective for not only grain refinement but also precipitate refinement even in brittle materials. In the present work, precipitate refinement of cast Al—Fe alloys by compressive torsion and the resulting improvements in their tensile properties were investigated. Compressive torsion with various numbers of revolutions was applied to Al—Fe alloys at 373 K. Then, the alloys were subjected to tensile testing at room temperature, 473 K, and 573 K. The obtained experimental results indicated that the initial eutectic microstructure of the alloys disappeared after the compressive torsion processing. All large precipitates with sizes of more than 200 μm were refined, and their sizes were reduced to several tens of micrometers. Furthermore, these refined precipitates were dispersed homogenously in the alloy microstructure. In result, the tensile properties of the alloys, namely, their strength and elongation, were improved remarkably. In particular, the elongation reached more than 30% at room temperature.

Design and Implementation of a Device for Nanostructuring of Metallic Materials by Multiaxial Forging Method

2014 ◽  
Vol 657 ◽  
pp. 193-197 ◽  
Author(s):  
Alin Marian Cazac ◽  
Costică Bejinariu ◽  
Iulian Ionita ◽  
Stefan Lucian Toma ◽  
Cosmin Rodu
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Deformation Process ◽  
Extraction System ◽  
Metallic Materials ◽  
Severe Plastic Deformation Process ◽  
Design And Implementation ◽  
Discontinuous Process ◽  
Plastic Deformation Process ◽  
High Level

This paper presents materialization through a device of severe plastic deformation process by multiaxial forging. In essence, by design, the device includes a board reinforced with fretting rings where the severe plastic deformation takes place and an assembly, punch-counterpunch that transmits the force from the source and performs multiaxial forging as a discontinuous process. The device has a high level of universality and has the following advantages: contains an extraction system of deformed blank from the active fretted broad; ensures workpiece centering into place of active plate, contains a system for measuring the strength of forging; can be used on any type of press.

Evaluation of Reshaping Methods for Multi-Pass Equal Channel Angular Extrusion

2008 ◽  
Vol 584-586 ◽  
pp. 63-67
Author(s):  
D.C. Foley ◽  
R.E. Barber ◽  
J.T. Im ◽  
B. Onipede ◽  
K.T. Hartwig
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Deformation Process ◽  
Equal Channel Angular Extrusion ◽  
Processing Efficiency ◽  
Severe Plastic Deformation Process ◽  
Method Selection ◽  
Plastic Deformation Process ◽  
Angular Extrusion ◽  
Significant Step

Equal Channel Angular Extrusion is a widely adopted severe plastic deformation process capable of imparting large amounts of strain in a material via multiple passes through the die. In order to facilitate reinsertion of worked bars for multipass processing, reshaping is often required. Although this topic is rarely discussed in the literature, it is a significant step that can influence processing efficiency. This paper presents several reshaping options and makes recommendations for method selection based on the authors’ experiences with each.

Sign in / Sign up

Export Citation Format

Share Document