Plastic Flow Properties and Microstructural Evolution in an Ultrafine-Grained Al-Mg-Si Alloy at Elevated Temperatures

2009 ◽  
Vol 40 (13) ◽  
pp. 3294-3303 ◽  
Author(s):  
B.P. Kashyap ◽  
P.D. Hodgson ◽  
Y. Estrin ◽  
I. Timokhina ◽  
M.R. Barnett ◽  
...  
Keyword(s):  
Plastic Flow ◽  
Microstructural Evolution ◽  
Elevated Temperatures ◽  
Flow Properties ◽  
Ultrafine Grained

Evaluating the Flow Properties of Ultrafine-Grained Materials

2013 ◽  
Vol 829 ◽  
pp. 3-9
Author(s):  
Megumi Kawasaki ◽  
Terence G. Langdon
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Elevated Temperatures ◽  
Strain Rates ◽  
Flow Properties ◽  
Ultrafine Grained ◽  
Recent Developments ◽  
Flow Mechanisms ◽  
Small Grains ◽  
Ultrafine Grained Materials

Processing through the application of severe plastic deformation (SPD) provides an opportunity for achieving significant grain refinement, typically to the submicrometer or even the nanometer level. If these small grains are reasonably stable at elevated temperatures, it is possible to achieve excellent superplastic capabilities at very rapid strain rates. Recent developments on the flow properties of ultrafine-grained materials are examined and it is shown that the flow mechanisms can be readily depicted using deformation mechanism maps. Examples of maps are presented for materials processed by SPD techniques.

Plastic flow and microstructural evolution in Ti–6Al–2Zr–1Mo–1V alloys during hot deformation

2011 ◽  
Vol 27 (1) ◽  
pp. 453-457 ◽  
Author(s):  
X. J. Dong ◽  
S. Q. Lu ◽  
H. Z. Zhang ◽  
W. Li ◽  
K. L. Wang
Keyword(s):  
Plastic Flow ◽  
Microstructural Evolution ◽  
Hot Deformation

Microstructural evolution at large driving forces during grain growth of ultrafine-grained Ni–1.2wt%P

1992 ◽  
Vol 131 (2) ◽  
pp. 569-575 ◽  
Author(s):  
D. Osmola ◽  
P. Nolan ◽  
U. Erb ◽  
G. Palumbo ◽  
K. T. Aust
Keyword(s):  
Grain Growth ◽  
Microstructural Evolution ◽  
Driving Forces ◽  
Ultrafine Grained

Evaluating plastic flow properties by characterizing indentation size effect using a sharp indenter

2008 ◽  
Vol 56 (14) ◽  
pp. 3338-3343 ◽  
Author(s):  
Ju-Young Kim ◽  
Seung-Kyun Kang ◽  
Julia R. Greer ◽  
Dongil Kwon
Keyword(s):  
Size Effect ◽  
Plastic Flow ◽  
Indentation Size Effect ◽  
Flow Properties ◽  
Indentation Size

Microstructure and Aging Behavior of Al-0.2wt%Zr Alloy Heavily Deformed by ARB Process

2008 ◽  
Vol 584-586 ◽  
pp. 728-733 ◽  
Author(s):  
Takatoshi Sato ◽  
Daisuke Terada ◽  
Nobuhiro Tsuji
Keyword(s):  
Grain Size ◽  
Microstructural Evolution ◽  
Coarse Grain ◽  
Aging Behavior ◽  
Roll Bonding ◽  
Solution Treated ◽  
Ultrafine Grained ◽  
Mean Grain Size ◽  
Treated State ◽  
Zr Alloy

An Al-0.2wt%Zr alloy was severely deformed up to a strain of 8.0 by accumulative roll bonding (ARB) process, started from the solution-treated state. The microstructural evolution during ARB and its aging behavior were investigated. With increasing the number of ARB cycles, Vickers hardness of the specimens increased and reached to a constant value. The microstructural evolution during the ARB could be understood in terms of grain subdivision. The ultrafine grained (UFG) materials whose mean grain size was 0.4 -m were obtained by 10-cycle ARB process. In aging of the ARB processed specimens at high temperatures above 673K, the UFG microstructures quickly coarsened. On the other hand, it was suggested that the precipitation behaviors of the ARB specimen at 623K were quite unique and completely different from those of the conventionally solution-treated material with coarse grain size.

Tensile Deformation and Fracture in a Bulk Nanostructured Al-5083/SiCp Composite at Elevated Temperatures

2007 ◽  
Vol 29-30 ◽  
pp. 245-248
Author(s):  
F. Tang ◽  
B.Q. Han ◽  
Masuo Hagiwara ◽  
Julie M. Schoenung
Keyword(s):  
Elevated Temperatures ◽  
Tensile Deformation ◽  
Tensile Tests ◽  
Nanostructured Composite ◽  
Sic Particles ◽  
Deformation And Fracture ◽  
Ultrafine Grained ◽  
Al 5083 Alloy

An ultrafine-grained Al-5083 alloy reinforced with 5 vol.% nano-sized β-SiC particles was fabricated with a powder cryomilling and consolidation technique. Tensile tests were conducted at temperatures from 298 to 773 K for this composite. The mechanisms for deformation and fracture of this nanostructured composite at various temperatures are discussed.

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