Use of Small-Angle X-Ray Scattering for the Characterisation of Precipitates in Aluminium Alloys

2006 ◽  
Vol 519-521 ◽  
pp. 1349-1354 ◽  
Author(s):  
Alexis Deschamps ◽  
Myriam Dumont ◽  
Ludovic Lae ◽  
Françoise Bley
Keyword(s):  
Small Angle ◽  
Aluminium Alloys ◽  
Volume Fraction ◽  
Precipitate Size ◽  
X Ray ◽  
Friction Stir ◽  
X Ray Scattering ◽  
Precipitate Microstructure ◽  
Ray Scattering

This paper presents two studies illustrating the possibilities of Small-Angle X-ray Scattering for characterising quantitatively the state of precipitation in aluminium alloys. In the first example, maps are presented, of precipitate size and volume fraction in the cross-section of friction stir welds of AA7449 alloy. It is shown that the influence of welding speed on the distribution of mechanical properties can be understood using this microstructural data. In the second example, the precipitation kinetics in an Al-Zr-Sc alloy is evaluated by in-situ small angle X-ray scattering. Evidence is given for the heterogeneous chemical structure of the Al3(Zr,Sc) precipitates, consisting of a Zr-rich shell surrounding a Sc-rich core. It is shown that this particular distribution results in a very good resistance to coarsening of the precipitate microstructure.

scholarly journals In-situ Characterization of Crystallization and Melting of Soft, Thermoresponsive Microgels by Small-Angle X-ray Scattering

Soft Matter ◽  
2022 ◽  
Author(s):  
Dmitry Lapkin ◽  
Nastasia Mukharamova ◽  
Dameli Assalauova ◽  
Svetlana Dubinina ◽  
Jens Stellhorn ◽  
...  
Keyword(s):  
Small Angle ◽  
Volume Fraction ◽  
Colloidal Suspensions ◽  
In Situ Characterization ◽  
Interparticle Interactions ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Depending on the volume fraction and interparticle interactions, colloidal suspensions can form different phases, ranging from fluids, crystals, and glasses to gels. For soft microgels that are made from thermoresponsive...

Small Angle X-Ray Scattering Study in Equal-Channel Angular Pressed 7055 Al Alloys

2007 ◽  
Vol 546-549 ◽  
pp. 839-844 ◽  
Author(s):  
Li Jing Zheng ◽  
Guo Qiang Li ◽  
Huan Xi Li ◽  
Chang Qi Chen ◽  
B.Z. Dong
Keyword(s):  
Small Angle ◽  
Volume Fraction ◽  
Quantitative Information ◽  
Al Alloys ◽  
Precipitate Size ◽  
X Ray ◽  
Angular Pressing ◽  
X Ray Scattering ◽  
High Microhardness ◽  
Ray Scattering

A study was conducted on 7055 Al alloys processed by Equal-channel Angular Pressing (ECAP). The quantitative information about precipitate size, distribution and volume fraction in ECAPed samples was investigated by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). It is found that with the number of ECAP increasing, the quantitative information about volume fraction (fv), precipitate size (R), specific inner surface of particle-matrix (Sp), and integrated intensity (Q0) all increased, indicating that ECAP enhanced the nucleation and growth of precipitates. The microhardness of samples after two passes of ECAP is higher than that of T6 treated samples even after 96 h at 120°C. The formation of fine grains, higher volume fraction of precipitates, together with strain hardening induced by severe deformation are the main factors leading to a high microhardness in ECAPed samples.

scholarly journals In-situ aerosol nanoparticle characterization by small angle X-ray scattering at ultra-low volume fraction

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
P. S. Bauer ◽  
H. Amenitsch ◽  
B. Baumgartner ◽  
G. Köberl ◽  
C. Rentenberger ◽  
...  
Keyword(s):  
Small Angle ◽  
Volume Fraction ◽  
Nanoparticle Characterization ◽  
X Ray ◽  
X Ray Scattering ◽  
Low Volume ◽  
Ray Scattering

A Revised O2 Reduction Model in Li-O2 Batteries as Revealed by in Situ Small Angle X-Ray Scattering

2019 ◽  
Author(s):  
Christian Prehal ◽  
Aleksej Samojlov ◽  
Manfred Nachtnebel ◽  
Manfred Kriechbaum ◽  
Heinz Amenitsch ◽  
...  
Keyword(s):  
Small Angle ◽  
Wide Angle ◽  
Reduction Mechanism ◽  
Reduction Model ◽  
X Ray ◽  
X Ray Scattering ◽  
O2 Reduction ◽  
Ray Scattering

<b>Here we use in situ small and wide angle X-ray scattering to elucidate unexpected mechanistic insights of the O2 reduction mechanism in Li-O2 batteries.<br></b>

In situ Time-Resolved Small-Angle X-ray Scattering Reveals the Formation Kinetics of Polyelectrolyte Complex Micelles

2019 ◽  
Author(s):  
Hao Wu ◽  
Jeffrey Ting ◽  
Siqi Meng ◽  
Matthew Tirrell
Keyword(s):  
Small Angle ◽  
Self Assembly ◽  
Electrostatic Interactions ◽  
Polyelectrolyte Complex ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Kinetics Of ◽  
Ray Scattering

We have directly observed the <i>in situ</i> self-assembly kinetics of polyelectrolyte complex (PEC) micelles by synchrotron time-resolved small-angle X-ray scattering, equipped with a stopped-flow device that provides millisecond temporal resolution. This work has elucidated one general kinetic pathway for the process of PEC micelle formation, which provides useful physical insights for increasing our fundamental understanding of complexation and self-assembly dynamics driven by electrostatic interactions that occur on ultrafast timescales.

Evolution of Pore Ordering during Anodizing of Aluminum Single Crystals: In Situ Small-Angle X-ray Scattering Study

2021 ◽  
Author(s):  
Ilya V. Roslyakov ◽  
Andrei P. Chumakov ◽  
Andrei A. Eliseev ◽  
Alexey P. Leontiev ◽  
Oleg V. Konovalov ◽  
...  
Keyword(s):  
Single Crystals ◽  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

In situ small-angle x-ray scattering study of nanostructure evolution during decomposition of arc evaporated TiAlN coatings

2009 ◽  
Vol 94 (5) ◽  
pp. 053114 ◽  
Author(s):  
M. Odén ◽  
L. Rogström ◽  
A. Knutsson ◽  
M. R. Terner ◽  
P. Hedström ◽  
...  
Keyword(s):  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

Ion track etching of polycarbonate membranes monitored by in situ small angle X-ray scattering

2021 ◽  
Author(s):  
Alexander Kiy ◽  
Christian Notthoff ◽  
Shankar Dutt ◽  
Mark Grigg ◽  
Andrea Hadley ◽  
...  
Keyword(s):  
High Precision ◽  
Small Angle ◽  
Selective Dissolution ◽  
X Ray ◽  
Ion Tracks ◽  
X Ray Scattering ◽  
Track Etching ◽  
Polycarbonate Membranes ◽  
Ray Scattering

In situ small angle X-ray scattering (SAXS) measurements of ion track etching of polycarbonate foils are used to directly monitor the selective dissolution of ion tracks with high precision, including...

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