Lattice Misorientation Evolution and Grain Refinement in Al-Si Alloys Under High-Strain Shear Deformation

2021 ◽  
Author(s):  
Bharat Gwalani ◽  
Wenkai Fu ◽  
Matthew Olszta ◽  
Joshua Silverstein ◽  
Digvijay R. Yadav ◽  
...  
Keyword(s):  
Shear Deformation ◽  
Grain Refinement ◽  
High Strain ◽  
Lattice Misorientation

Lattice misorientation evolution and grain refinement in Al-Si alloys under high-strain shear deformation

Materialia ◽  
2021 ◽  
pp. 101146
Author(s):  
Bharat Gwalani ◽  
Wenkai Fu ◽  
Mathew Olszta ◽  
Joshua Silverstein ◽  
Digvijay R. Yadav ◽  
...  
Keyword(s):  
Shear Deformation ◽  
Grain Refinement ◽  
High Strain ◽  
Lattice Misorientation

Shear Pressing for Grain Refinement of Al-Mg-Li Sheet

2007 ◽  
Vol 546-549 ◽  
pp. 885-888
Author(s):  
Yu Xuan Du ◽  
Xin Ming Zhang ◽  
Ling Ying Ye ◽  
Zhi Hui Luo
Keyword(s):  
Shear Deformation ◽  
Grain Refinement ◽  
Electron Backscatter Diffraction ◽  
Grain Structure ◽  
Grain Refining ◽  
Metallic Materials ◽  
Inclined Plane ◽  
Fine Grained ◽  
Electron Backscatter ◽  
Backscatter Diffraction

A novel shear-deformation technique, named ‘shear pressing’ (SP), was developed for fabrication of plate-shaped fine grained metallic materials. The principle of SP is that a material is subjected to shear deformation by utilizing pressing with inclined plane dies. A micrometer order grain structure was obtained in an Al-Mg-Li alloy at strain of ε = -2.3 by utilizing this technique. The grain refinement sequences during pressing were examined by electron backscatter diffraction. The enhancement of grain refinement to the Al-Mg-Li alloy was compared with plane strain compression (PSC) at similar strains. The effect of the shear strain on the accelerated grain refining during compressing has been discussed.

Using ECAP to achieve grain refinement, precipitate fragmentation and high strain rate superplasticity in a spray-cast aluminum alloy

2003 ◽  
Vol 51 (20) ◽  
pp. 6139-6149 ◽  
Author(s):  
Cheng Xu ◽  
Minoru Furukawa ◽  
Zenji Horita ◽  
Terence G Langdon
Keyword(s):  
Aluminum Alloy ◽  
High Strain Rate ◽  
Strain Rate ◽  
Grain Refinement ◽  
High Strain ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum

High strain rate shear deformation and fracture behaviour of biomedical titanium alloy

2010 ◽  
Vol 26 (9) ◽  
pp. 1079-1087 ◽  
Author(s):  
W.-S. Lee ◽  
T.-H. Chen ◽  
C.-F. Lin ◽  
N.-W. Lee
Keyword(s):  
Titanium Alloy ◽  
High Strain Rate ◽  
Strain Rate ◽  
Shear Deformation ◽  
High Strain ◽  
Fracture Behaviour ◽  
Deformation And Fracture ◽  
Biomedical Titanium Alloy

Significance of High Rate Superplasticity in Metallic Materials

1990 ◽  
Vol 196 ◽  
Author(s):  
Norio Furushiro ◽  
Shigenori Hori
Keyword(s):  
Grain Size ◽  
High Strain Rate ◽  
Strain Rate ◽  
Grain Refinement ◽  
Fine Particles ◽  
High Strain ◽  
High Rate ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Al Alloy

ABSTRACTIt has been expected that “High rate superplastic materials” will be developed for industrial applications. The Dorntype equation for high temperature deformation suggests that strain rate can be increased if the grain size is decreased. This means that grain refinement can effectively establish high strain rate superplastic materials.It is well known that a high degree of grain size refinement will result from the addition of zirconium to Al-base alloys. Powder-metallurgical processing with rapidly solidified powders is also available for the improvement of superplasticity by both the refinement of the solidified structure and the maintenance of the stable fine structure of a 7475 Al alloy during recrystallization and deformation. Therefore. P/M 7475 Al alloys containing Zr up to 0.9 wt% were selected as candidate specimens. The objective of the present paper includes the clarification of the role and the effective amount of Zr to obtain high strain rate superplastic materials. As a result, the addition of 0.3%Zr or more is effective in grain refinement of the P/M 7475 Al alloy. However, alloys containing 0.7 and 0.9 wt%Zr only show superplasticity at 793K. The optimum strain rate is shifted to a higher range with increasing Zr. The alloy of 7475 Al-0.9%Zr shows the maximum elongation of 900% at the remarkably high strain rate of 3.3×10−1 s−1.The deformation mechanism of such high stain rate superplasticity will be discussed briefly, by considering the effect of the fine particles of Zr on superplastic behavior.

Shear deformation and grain refinement in pure Al by asymmetric rolling

2008 ◽  
Vol 18 (4) ◽  
pp. 774-777 ◽  
Author(s):  
Fang-qing ZUO ◽  
Jian-hua JIANG ◽  
Ai-dang SHAN ◽  
Jian-min FANG ◽  
Xing-yao ZHANG
Keyword(s):  
Shear Deformation ◽  
Grain Refinement ◽  
Asymmetric Rolling

Shear deformation and grain refinement during accumulative back extrusion of AZ31 magnesium alloy

2010 ◽  
Vol 46 (6) ◽  
pp. 1937-1944 ◽  
Author(s):  
S. M. Fatemi-Varzaneh ◽  
A. Zarei-Hanzaki ◽  
S. Izadi
Keyword(s):  
Magnesium Alloy ◽  
Shear Deformation ◽  
Grain Refinement ◽  
Az31 Magnesium Alloy
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