scholarly journals Influence of strain rate on deformation behaviour of an AX52 alloy processed by equal channel angular pressing (ECAP)

2018 ◽  
Vol 8 (4) ◽  
pp. 517-523 ◽  
Author(s):  
Z. Trojanová ◽  
K. Halmešová ◽  
J. Džugan ◽  
P. Palček ◽  
P. Minárik ◽  
...  
Keyword(s):  
Strain Rate ◽  
Equal Channel Angular Pressing ◽  
Deformation Behaviour ◽  
Angular Pressing

Deformation Behaviour of an Ultra-Fine Grained Al6082 Alloy

2008 ◽  
Vol 584-586 ◽  
pp. 703-707 ◽  
Author(s):  
Ilchat Sabirov ◽  
Yuri Estrin ◽  
Matthew R. Barnett ◽  
Ilana B. Timokhina ◽  
Peter D. Hodgson
Keyword(s):  
Plastic Deformation ◽  
Strain Rate ◽  
Equal Channel Angular Pressing ◽  
Deformation Behaviour ◽  
Tensile Elongation ◽  
Al Alloy ◽  
Fine Grained ◽  
Angular Pressing ◽  
Ultrafine Grained

This work focuses on the effect of strain rate on the deformation behaviour of an ultrafine grained Al alloy 6082 produced by equal channel angular pressing. The uniform tensile elongation was found to increase with decreasing strain rate very substantially. This effect is discussed in terms of the mechanisms that control plastic deformation of the alloy.

Extraordinary High Strain Rate Superplasticity of an Al-Mg-Sc-Zr Alloy Subjected to Equal Channel Angular Pressing

2012 ◽  
Vol 735 ◽  
pp. 295-300
Author(s):  
Elena Avtokratova ◽  
Oleg Sitdikov ◽  
Michael Markushev ◽  
Radik R. Mulyukov
Keyword(s):  
Strain Rate ◽  
Equal Channel Angular Pressing ◽  
High Strain ◽  
Strain Rate Range ◽  
Rate Range ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Excess Phases ◽  
Ultrafine Grained Microstructure ◽  
Zr Alloy

Unique superplastic elongations up to 4100% were achieved at 450°C in the strain rate range of 10-2-10-1s-1for Al-Mg-Sc-Zr alloy with a grain size ~1 μm processed by warm-to-hot equal channel angular pressing. Such a behavior is attributed to the synergy of complementary factors resulted in high homogeneity and stability of ultrafine-grained microstructure and superplastic flow, involving large proportion of high-angle grain boundaries, presence of dispersoids of aluminides of transition metals and negligible amount of coarse excess phases.

Cavitation Behavior of Ultra-Fine Grained Ti-6Al-4V Alloy Produced by Equal-Channel Angular Pressing

2007 ◽  
Vol 551-552 ◽  
pp. 621-626
Author(s):  
Young Gun Ko ◽  
Yong Nam Kwon ◽  
Jung Hwan Lee ◽  
Dong Hyuk Shin ◽  
Chong Soo Lee
Keyword(s):  
Grain Size ◽  
Strain Rate ◽  
Equal Channel Angular Pressing ◽  
Cavity Growth ◽  
Rate Sensitivity ◽  
Theoretical Models ◽  
Coarse Grained ◽  
Fine Grained ◽  
Angular Pressing ◽  
Cavitation Behavior

Cavitation behavior during superplastic flow of ultra-fine grained (UFG) Ti-6Al-4V alloy was established with the variation of grain size and misorientation. After imposing an effective strainup to 8 via equal-channel angular pressing (ECAP) at 873 K, alpha-phase grains were markedly refined from 11 μm to ≈ 0.3 μm, and misorientation angle was increased. Uniaxial-tension tests were conducted for initial coarse grained (CG) and two UFG alloys (ε = 4 and 8) at temperature of 973 K and strain rate of 10-4 s-1. Quantitative measurements of cavitation evidenced that both the average size and the area fraction of cavities significantly decreased with decreasing grain size and/or increasing misorientation. It was also found that, when compared to CG alloy, cavitation as well as diffused necking was less prevalent in UFG alloys, which was presumably due to the higher value of strain-rate sensitivity. Based on the several theoretical models describing the cavity growth behavior, the cavity growth mechanism in UFG alloys was suggested.

Superplasticity of Magnesium Alloy ZK40 Processed by Equal Channel Angular Pressing

2005 ◽  
Vol 488-489 ◽  
pp. 575-580 ◽  
Author(s):  
Lin Yang ◽  
X.M. Yang ◽  
T. Liu ◽  
Shi Ding Wu ◽  
Li Jia Chen
Keyword(s):  
Magnesium Alloy ◽  
Strain Rate ◽  
Equal Channel Angular Pressing ◽  
Angular Pressing ◽  
Elongation To Failure

The superplasticity and microstructure of magnesium alloy ZK40 processed by ECAP for 1 and 4 passes were investigated. Tensile experiments at 523 K showed that the elongation of ZK40 was improved with the increasing passes. The elongation-to-failure of ZK40 processed by ECAP for 4 passes tested at 523 K and strain rate of 1×10-4s-1 was 660%. The microstructural analyses explained these results.

scholarly journals Effects of Temperature and Strain Rate on Plastic Deformation of Ultrafine-Grained Copper Prepared by Equal-Channel Angular Pressing

2014 ◽  
Vol 55 (10) ◽  
pp. 1525-1530 ◽  
Author(s):  
Satoshi Okubo ◽  
Hiroki Abe ◽  
Yoji Miyajima ◽  
Toshiyuki Fujii ◽  
Susumu Onaka ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Strain Rate ◽  
Equal Channel Angular Pressing ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Effects Of Temperature

Superplastic Behaviour of AZ61-F Magnesium Composite Materials

2017 ◽  
Vol 36 (3) ◽  
pp. 279-283 ◽  
Author(s):  
Michal Besterci ◽  
Katarína Sülleiová ◽  
Oksana Velgosová ◽  
Beáta Balloková ◽  
S.-J. Huang
Keyword(s):  
Grain Size ◽  
Composite Materials ◽  
Strain Rate ◽  
Magnesium Alloys ◽  
Equal Channel Angular Pressing ◽  
Strain Rates ◽  
Maximum Strain ◽  
Plastic Deformations ◽  
Angular Pressing ◽  
Different Temperatures

AbstractDeformation of AZ61-F magnesium alloys with 1 wt % of Al2O3phase was tested at different temperatures and different strain rates. It was shown that at temperatures 473–523 K and the highest strain rate applied from 1×10–2s–1to 1×10–4s–1, a significant ductility growth was observed. The grain size of 0.6–0.8 μm was reached by severe plastic deformations by means of equal channel angular pressing (ECAP). Secondary Mg17Al12and Al2O3phases were identified. Maximum strain was gained at temperature of 473 K and strain rate of 1×10–4s–1.

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