Structure and properties of ultra-fine grain Cu–Cr–Zr alloy produced by equal-channel angular pressing

2002 ◽  
Vol 50 (7) ◽  
pp. 1639-1651 ◽  
Author(s):  
A Vinogradov ◽  
V Patlan ◽  
Y Suzuki ◽  
K Kitagawa ◽  
V.I Kopylov
Keyword(s):  
Equal Channel Angular Pressing ◽  
Structure And Properties ◽  
Angular Pressing ◽  
Fine Grain ◽  
Zr 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.

Evaluation Grain Homogeneity of Aluminium after ECAP Process by ECAP Geometry Analysis Using Taguchi Method

2013 ◽  
Vol 594-595 ◽  
pp. 896-901
Author(s):  
Aminnudin ◽  
Pratiko ◽  
Anindito Purnowidodo ◽  
Yudy Surya Irawan ◽  
Shigeyuki Haruyama ◽  
...  
Keyword(s):  
Grain Size ◽  
Taguchi Method ◽  
Equal Channel Angular Pressing ◽  
Channel Angle ◽  
Angular Pressing ◽  
Fine Grain ◽  
Ecap Process ◽  
Fillet Radius ◽  
Geometry Analysis

Grain size and homogeneity are influence to aluminium properties, Equal channel angular pressing (ECAP) can produce aluminium with ultra fine grain Size (UFG). The grain size is depends on ECAP Dies geometry (Channel angle Φ, Fillet radius ψ) and friction, taguchi method used to find the optimum dies geometry its can produce smaller grain size and homogeny. Modeling done with channel angels 90, 105 and 120°, fillet radius (inside) 1.5, 5,0 and 10 mm ; fillet radius (outside) 1.5, 5,0 and 10 mm and friction 0, 0,025 and 0,05. Modeling used L9 taguchi matrix, the most homogeny dies is ECAP dies with channel angel 105°, fillet radius (inside) 10 mm ; fillet radius (outside) 0 mm and friction 0,025

Sign in / Sign up

Export Citation Format

Share Document