Electrochemical Properties of Al-Cu Alloys in Nacl Solutions

2015 ◽  
pp. 727-734 ◽  
Author(s):  
Alejandra Silvina Roman ◽  
Claudia Marcela Méndez ◽  
Carlos Enrique Schvezov ◽  
Alicia Esther Ares
Keyword(s):  
Electrochemical Properties ◽  
Cu Alloys

Local electrochemical properties of laser beam-welded high-strength Al–Zn–Mg–Cu alloys

2008 ◽  
Vol 59 (1) ◽  
pp. 5-13 ◽  
Author(s):  
J. Wloka ◽  
T. Hack ◽  
S. Virtanen
Keyword(s):  
Laser Beam ◽  
Electrochemical Properties ◽  
High Strength ◽  
Cu Alloys

The electrochemical properties of melt-spun Al–Si–Cu alloys

2011 ◽  
Vol 129 (3) ◽  
pp. 1006-1010 ◽  
Author(s):  
Linping Zhang ◽  
Fei Wang ◽  
Pu Liang ◽  
Xianlei Song ◽  
Qing Hu ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Cu Alloys ◽  
Melt Spun

Electrochemical Properties of Al-Cu Alloys in NaCl Solutions

2015 ◽  
pp. 727-734
Author(s):  
Alejandra Silvina Roman ◽  
Claudia Marcela Méndez ◽  
Carlos Enrique Schvezov ◽  
Alicia Esther Ares
Keyword(s):  
Electrochemical Properties ◽  
Cu Alloys

Plastic deformation of θ ' in Al-4%Cu alloy

1978 ◽  
Vol 36 (1) ◽  
pp. 576-577
Author(s):  
Shrikant P. Bhat
Keyword(s):  
Deformation Behavior ◽  
Room Temperature ◽  
Electron Microscopic Observation ◽  
Bulk Alloy ◽  
Electron Microscopic ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Orowan Mechanism ◽  
The Subject ◽  
Cyclic Straining

deformation behavior of Al-Cu alloys aged to contain θ ' has been the subject of many investigations (e.g., Ref. 1-5). Since θ ' is strong and hard, dislocations bypass θ ' plates (Orowan mechanism) at low strains. However, at high strains the partially coherent θ ' plates are probably sheared, although the mechanism is complex, depending on the form of deformation. Particularly, the cyclic straining of the bulk alloy is known to produce gross bends and twists of θ '. However, no detailed investigation of the deformation of θ ' has yet been reported; moreover, Calabrese and Laird interpreted the deformation of θ ' as largely being elastic.During an investigation of high temperature cyclic deformation, the detailed electron-microscopic observation revealed that, under reversed straining conditions, θ ' particles are severely distorted--bent and twisted depending on the local matrix constraint. A typical electronmicrograph, showing the twist is shown in Fig. 1. In order to establish whether the deformation is elastic or plastic, a sample from a specimen cycled at room temperature was heated inside the microscope and the results are presented in a series of micrographs (Fig. 2a-e).

Precipitation in Al-Li-Cu Alloys

1981 ◽  
Vol 39 ◽  
pp. 44-45
Author(s):  
J. E. O'Neal ◽  
K. K. Sankaran
Keyword(s):  
Electron Microscopy ◽  
Age Hardening ◽  
Precipitation Behavior ◽  
Zone Formation ◽  
Specific Strength ◽  
Hardening Behavior ◽  
Cu Alloys ◽  
High Specific Strength ◽  
Transmission Electron ◽  
Structural Applications

Al-Li-Cu alloys combine high specific strength and high specific modulus and are potential candidates for aircraft structural applications. As part of an effort to optimize Al-Li-Cu alloys for specific applications, precipitation in these alloys was studied for a range of compositions, and the mechanical behavior was correlated with the microstructures.Alloys with nominal compositions of Al-4Cu-2Li-0.2Zr, Al-2.5Cu-2.5Li-0.2Zr, and Al-l.5Cu-2.5Li-0.5Mn were argon-atomized into powder at solidification rates ≈ 103°C/s. Powders were consolidated into bar stock by vacuum pressing and extruding at 400°C. Alloy specimens were solution annealed at 530°C and aged at temperatures up to 250°C, and the resultant precipitation was studied by transmission electron microscopy (TEM).The low-temperature (≲100°C) precipitation behavior of the Al-4Cu-2Li-0.2Zr alloy is a combination of the separate precipitation behaviors of Al-Cu and Al-Li alloys. The age-hardening behavior at these temperatures is characteristic of Guinier-Preston (GP) zone formation, with additional strengthening resulting from the coherent precipitation of δ’ (Al3Li, Ll2 structure), the presence of which is revealed by the selected-area diffraction pattern (SADP) shown in Figure la.

Imaging of Al-Li-Cu alloys with a Scanning Ion Microprobe

1990 ◽  
Vol 48 (2) ◽  
pp. 314-315
Author(s):  
K.K. Soni ◽  
D.B. Williams ◽  
J.M. Chabala ◽  
R. Levi-Setti ◽  
D.E. Newbury
Keyword(s):  
Mass Spectrometry ◽  
Secondary Ion Mass Spectrometry ◽  
Equilibrium Phase ◽  
Icosahedral Symmetry ◽  
Ion Microprobe ◽  
X Ray ◽  
Cu Alloys ◽  
Two Phases ◽  
The University ◽  
Secondary Ion

In contrast to the inability of x-ray microanalysis to detect Li, secondary ion mass spectrometry (SIMS) generates a very strong Li+ signal. The latter’s potential was recently exploited by Williams et al. in the study of binary Al-Li alloys. The present study of Al-Li-Cu was done using the high resolution scanning ion microprobe (SIM) at the University of Chicago (UC). The UC SIM employs a 40 keV, ∼70 nm diameter Ga+ probe extracted from a liquid Ga source, which is scanned over areas smaller than 160×160 μm2 using a 512×512 raster. During this experiment, the sample was held at 2 × 10-8 torr.In the Al-Li-Cu system, two phases of major importance are T1 and T2, with nominal compositions of Al2LiCu and Al6Li3Cu respectively. In commercial alloys, T1 develops a plate-like structure with a thickness <∼2 nm and is therefore inaccessible to conventional microanalytical techniques. T2 is the equilibrium phase with apparent icosahedral symmetry and its presence is undesirable in industrial alloys.

A STUDY OF G.P. ZONES IN Al-Cu ALLOYS BY ATOM-PROBE FIM

1986 ◽  
Vol 47 (C2) ◽  
pp. C2-171-C2-177 ◽  
Author(s):  
T. HASHIZUME ◽  
K. HONO ◽  
Y. HASEGAWA ◽  
K. HIRANO ◽  
T. SAKURAI
Keyword(s):  
Atom Probe ◽  
Cu Alloys

MECHANICAL AND ELECTROCHEMICAL PROPERTIES OF TANTALUM IMPLANTED BY NITROGEN IONS

2014 ◽  
Vol 18 (1-2) ◽  
pp. 143-153 ◽  
Author(s):  
A. H. Ramezani ◽  
M. R. Hantehzadeh ◽  
Mahmoud Ghoranneviss ◽  
E. Darabi
Keyword(s):  
Electrochemical Properties ◽  
Nitrogen Ions

Highly Luminescent 4-Pyridyl-Extended Dithieno[3,2-b:2′,3′-d]phospholes

2020 ◽  
Author(s):  
Thomas Baumgartner ◽  
Paul Demay-Drouhard
Keyword(s):  
Electrochemical Properties ◽  
Quantum Yields

The unexpectedly challenging synthesis of 4-pyridyl-extended dithienophospholes is reported. The optical and electrochemical properties of the phosphoryl-bridged species were studied experimentally and computationally, and their properties compared to their non-<i>P</i>-bridged congeners. The 4-pyridyl-extended dithieno-phospholes display quantitative luminescence quantum yields in solution.<br><br>

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