Superplastic Deformation of Defect-Free Au Nanowires via Coherent Twin Propagation

Nano Letters ◽  
2011 ◽  
Vol 11 (8) ◽  
pp. 3499-3502 ◽  
Author(s):  
Jong-Hyun Seo ◽  
Youngdong Yoo ◽  
Na-Young Park ◽  
Sang-Won Yoon ◽  
Hyoban Lee ◽  
...  
Keyword(s):  
Superplastic Deformation ◽  
Twin Propagation ◽  
Au Nanowires

“Cavity” formation in superplastically deformed aluminium alloys

1990 ◽  
Vol 48 (4) ◽  
pp. 958-959
Author(s):  
A. Cziráki ◽  
E. Ková-csetényi ◽  
T. Torma ◽  
T. Turmezey
Keyword(s):  
Grain Boundaries ◽  
Aluminium Alloys ◽  
Superplastic Deformation ◽  
Volume Fraction ◽  
Superplastic Forming ◽  
Polished Surface ◽  
Cavity Formation ◽  
Stress Concentrations ◽  
Electron Microscopic ◽  
Commercial Aluminium

It is known that the formation of cavities during superplastic deformation can be correlated with the development of stress concentrations at irregularities along grain boundaries such as particles, ledges and triple points. In commercial aluminium alloys Al-Fe-Si particles or other coarse constituents may play an important role in cavity formation.Cavity formation during superplastic deformation was studied by optical metallography and transmission scanning electron microscopic investigations on Al-Mg-Si and Al-Mg-Mn alloys. The structure of particles was characterized by selected area diffraction and X-ray micro analysis. The volume fraction of “voids” was determined on mechanically polished surface.It was found by electron microscopy that strongly deformed regions are formed during superplastic forming at grain boundaries and around coarse particles.According to electron diffraction measurements these areas consist of small micro crystallized regions. See Fig.l.Comparing the volume fraction and morphology of cavities found by optical microscopy a good correlation was established between that of micro crystalline regions.

THE EFFECT OF SUPERPLASTIC DEFORMATION ON THE TENSILE AND FATIGUE PROPERTIES OF Al-Li (8090) ALLOY

1987 ◽  
Vol 48 (C3) ◽  
pp. C3-257-C3-268
Author(s):  
D. S. McDARMAID ◽  
A. J. SHAKESHEFF
Keyword(s):  
Superplastic Deformation ◽  
Fatigue Properties

Superplastic deformation mechanism of an Al-Mg-Li alloy by high resolution surface studies

2021 ◽  
pp. 130251
Author(s):  
Xiaodong Liu ◽  
Lingying Ye ◽  
Jianguo Tang ◽  
Yu Dong ◽  
Bin Ke
Keyword(s):  
High Resolution ◽  
Deformation Mechanism ◽  
Superplastic Deformation ◽  
Surface Studies

Microtexture evolution during annealing and superplastic deformation of Al-5 pct Ca-5 pct Zn

1998 ◽  
Vol 29 (2) ◽  
pp. 485-492 ◽  
Author(s):  
M. T. Pérez-Prado ◽  
O. A. Ruano ◽  
G. González-Doncel ◽  
T. R. McNelley
Keyword(s):  
Superplastic Deformation

The Effect of Grain Size on Superplastic Deformation of Ti-6Al-4V Alloy

2007 ◽  
Vol 551-552 ◽  
pp. 387-392 ◽  
Author(s):  
Wen Juan Zhao ◽  
Hua Ding ◽  
D. Song ◽  
F.R. Cao ◽  
Hong Liang Hou
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Superplastic Deformation ◽  
Initial Strain Rate ◽  
Deformation Mode ◽  
Tensile Tests ◽  
Optical Microscope ◽  
Coarse Grained ◽  
Transmission Electron ◽  
Grain Growth Model

In this study, superplastic tensile tests were carried out for Ti-6Al-4V alloy using different initial grain sizes (2.6 μm, 6.5μm and 16.2 μm) at a temperature of 920°C with an initial strain rate of 1×10-3 s-1. To get an insight into the effect of grain size on the superplastic deformation mechanisms, the microstructures of deformed alloy were investigated by using an optical microscope and transmission electron microscope (TEM). The results indicate that there is dramatic difference in the superplastic deformation mode of fine and coarse grained Ti-6Al-4V alloy. Meanwhile, grain growth induced by superplastic deformation has also been clearly observed during deformation process, and the grain growth model including the static and strain induced part during superplastic deformation was utilized to analyze the data of Ti-6Al-4V alloy.

An Experimental Study of Cavity Nucleation During Superplastic Deformation

1990 ◽  
Vol 196 ◽  
Author(s):  
Jiang Xinggang ◽  
Cui Jianzhong ◽  
Ma Longxiang
Keyword(s):  
Grain Boundary ◽  
Superplastic Deformation ◽  
Thermomechanical Processing ◽  
High Stress ◽  
High Strength ◽  
Optical Microscope ◽  
Grain Boundary Sliding ◽  
Cavity Nucleation ◽  
High Stress Concentration ◽  
Voltage Electron

ABSTRACTCavity nucleation during superplastic deformation of a high strength aluminium alloy has been studied using a high voltage electron microscope and an optical microscope. The results show that cavities nucleation is due only to superplastic deformation and not to pre-existing microvoids which may be introduced during thermomechanical processing. The main reason for cavity nucleation is the high stress concentration at discontinuties in the plane of the grain boundary due to grain boundary sliding.

Effect of Hydrogen on the Development of Superplastic Deformation in the Submicrocrystalline Ti–6Al–4V Alloy

2016 ◽  
Vol 838-839 ◽  
pp. 344-349 ◽  
Author(s):  
Galina P. Grabovetskaya ◽  
Ekaterina N. Stepanova ◽  
Ilya V. Ratochka ◽  
I.P. Mishin ◽  
Olga V. Zabudchenko
Keyword(s):  
Solid Solution ◽  
Plastic Deformation ◽  
Flow Stress ◽  
Superplastic Deformation ◽  
Deformation Localization ◽  
Solid Solution Strengthening ◽  
Solution Strengthening ◽  
Hydrogenation Effect

Hydrogenation effect on the development of superplastic deformation in the submicrocrystalline Ti–6Al–4V alloy at temperatures (0.4–0.5)Тmelt is investigated. Hydrogenation of the submicrocrystalline Ti–6Al–4V alloy to 0.26 mass% during superplastic deformation is found to result in solid solution strengthening, plastic deformation localization, and as a consequence, decrease of the deformation to failure. Possible reasons for the decrease of the flow stress and increase of the deformation to failure in the submicrocrystalline Ti–6Al–4V–0.26H alloy during deformation under conditions of superplasticity and simultaneous hydrogen degassing from the alloy are discussed.

Superplastic Deformation Behavior of the Y-TZP Tested in Torsion

2001 ◽  
Vol 357-359 ◽  
pp. 559-564
Author(s):  
Yoshinobu Motohashi ◽  
S. Sanada ◽  
Takaaki Sakuma
Keyword(s):  
Deformation Behavior ◽  
Superplastic Deformation

An analysis of cavitation occurring in near-&gg titanium aluminide during superplastic deformation

2001 ◽  
Vol 32 (11) ◽  
pp. 2769-2779 ◽  
Author(s):  
CM. Lombard ◽  
A. K. Ghosh ◽  
S. L. Semiatin
Keyword(s):  
Titanium Aluminide ◽  
Superplastic Deformation
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