Probing phase separation and omega transformation in Vanadium-Titanium alloys through in-situ heating microscopy

1989 ◽

Vol 47 ◽

pp. 288-289

Author(s):

J. R. Reed ◽

D. J. Michel ◽

P. R. Howell

Keyword(s):

Thin Foil ◽

Icosahedral Symmetry ◽

Ion Milling ◽

Cu Alloy ◽

Thin Foils ◽

Heat Treated ◽

Aluminum Solid Solution ◽

In Situ Heating ◽

The Stability

The Al6Li3Cu (T2) phase, which exhibits five-fold or icosahedral symmetry, forms through solid state precipitation in dilute Al-Li-Cu alloys. Recent studies have reported that the T2 phase transforms either during TEM examination of thin foils or following ion-milling of thin foil specimens. Related studies have shown that T2 phase transforms to a microcrystalline array of the TB phase and a dilute aluminum solid solution during in-situ heating in the TEM. The purpose of this paper is to report results from an investigation of the influence of ion-milling on the stability of the T2 phase in dilute Al-Li-Cu alloy.The 3-mm diameter TEM disc specimens were prepared from a specially melted Al-2.5%Li-2.5%Cu alloy produced by conventional procedures. The TEM specimens were solution heat treated 1 h at 550°C and aged 1000 h at 190°C in air to develop the microstructure. The disc specimens were electropolished to achieve electron transparency using a 20:80 (vol. percent) nitric acid: methanol solution at -60°C.

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Innovative Closed-Cell Reactor Permits In Situ Heating and Gas Reactions with Atomic Resolution at Atmospheric Pressure

Microscopy and Microanalysis ◽

10.1017/s1431927612007441 ◽

2012 ◽

Vol 18 (S2) ◽

pp. 1118-1119 ◽

Cited By ~ 2

Author(s):

L. Allard ◽

S.H. Overbury ◽

M.B. Katz ◽

W.C. Bigelow ◽

D. Nackashi ◽

...

Keyword(s):

Atmospheric Pressure ◽

Atomic Resolution ◽

Closed Cell ◽

Cell Reactor ◽

In Situ Heating ◽

Gas Reactions

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

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Numerical study of thermo-hydro-mechanical responses of in situ heating test with phase-field model

International Journal of Rock Mechanics and Mining Sciences ◽

10.1016/j.ijrmms.2020.104542 ◽

2021 ◽

Vol 138 ◽

pp. 104542

Author(s):

Zhan Yu ◽

Jian-Fu Shao ◽

Minh-Ngoc Vu ◽

Gilles Armand

Keyword(s):

Phase Field ◽

Field Model ◽

Numerical Study ◽

Phase Field Model ◽

Mechanical Responses ◽

In Situ Heating ◽

Heating Test

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Diffusionless isothermal omega transformation in titanium alloys driven by quenched-in compositional fluctuations

Physical Review Materials ◽

10.1103/physrevmaterials.3.043604 ◽

2019 ◽

Vol 3 (4) ◽

Cited By ~ 6

Author(s):

Masakazu Tane ◽

Hiroki Nishiyama ◽

Akihiro Umeda ◽

Norihiko L. Okamoto ◽

Koji Inoue ◽

...

Keyword(s):

Titanium Alloys ◽

Omega Transformation

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Hydrogen and deuterium diffusion in vanadium-titanium alloys

Metallurgical Transactions A ◽

10.1007/bf02825705 ◽

1987 ◽

Vol 18 (2) ◽

pp. 249-254 ◽

Cited By ~ 13

Author(s):

D. T. Peterson ◽

H. M. Herro

Keyword(s):

Titanium Alloys ◽

Vanadium Titanium

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In situ microscopic studies on the structures and phase behaviors of SF/PEG films using solid-state NMR and Raman imaging

Physical Chemistry Chemical Physics ◽

10.1039/c6cp03314h ◽

2016 ◽

Vol 18 (24) ◽

pp. 16353-16360 ◽

Cited By ~ 7

Author(s):

Congheng Chen ◽

Ting Yao ◽

Sidong Tu ◽

Weijie Xu ◽

Yi Han ◽

...

Keyword(s):

Phase Separation ◽

Solid State Nmr ◽

Random Coil ◽

Rich Domain ◽

Microscopic Studies ◽

Helix Conformation ◽

Phase Behaviors ◽

Protein Rich ◽

Β Sheet

SF was incompatible with PEG in some extent, and the phase separation took place in their blend film. The conformation of SF in the interface between SF and PEG was changed to the β-sheet, while that in the protein-rich domain remained in the random coil and/or helix conformation.

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