Laue Method and Determination of Single Crystal Orientation

2017 ◽  
pp. 225-247
Keyword(s):  
Single Crystal ◽  
Crystal Orientation ◽  
Laue Method

Two Methods of Studying Structure Perfection of Single Crystal Nickel-Based Superalloys

2013 ◽  
Vol 203-204 ◽  
pp. 177-180 ◽  
Author(s):  
Arkadiusz Onyszko ◽  
Jan Sieniawski ◽  
Włodzimierz Bogdanowicz ◽  
Hans Berger
Keyword(s):  
Single Crystal ◽  
Crystal Orientation ◽  
Turbine Blades ◽  
Vacuum Furnace ◽  
Aerospace Materials ◽  
X Ray ◽  
University Of Technology ◽  
Assembly Structure ◽  
Development Laboratory ◽  
Laue Method

The article presents the comparison of two methods: classical X-ray topography and the modern automatic X-ray OD-EFG diffractometer. Both methods were applied to study the crystal orientation of turbine blades of single crystal nickel-based superalloys. The solidification of a hollow assembly structure for 5 various blades was carried out by the Bridgman method at the Research and Development Laboratory for Aerospace Materials at Rzeszow University of Technology using an ALD Vacuum Technologies vacuum furnace. Ceramic moulds made of Al2O3 were used. The alloy temperature during casting into the mould amounted to 1550°C. The specimens for Laue method tests were cut out from the blades at withdrawal rates of 1, 2, 3, 4, and 5 mm/min.

Analytical use of the stereographic Wulff net for single-crystal orientation for 1-, 2- and 3-rotated cuts

2003 ◽  
Vol 36 (2) ◽  
pp. 255-259 ◽  
Author(s):  
E. Michalski ◽  
A. Majchrowski
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Crystal Orientation ◽  
Lattice Parameter ◽  
Laue Method

A useful set of expressions that allow the analytical use of the stereographic Wulff net,e.g.for orientation in the Laue method, for 1-, 2- and 3-rotated cuts of single crystals fastened on a two-axis goniometric holder are derived. Application of the derived expressions in everyday crystallographic practice is illustrated by examples. The results of lattice-parameter measurements, the choice of planes suitable for diffractometric orientation, and the values of their Bragg angles, useful for orientation in the Laue and diffractometric methods, are described for Ca4GdO(BO3)3:Nd and CsLiB6O10single crystals.

scholarly journals A Review of the Measurement of Single Crystal Orientation Parameters of Nickel Castings

2011 ◽  
Vol 278 ◽  
pp. 84-89
Author(s):  
K. Clay ◽  
P.N. Quested ◽  
Roger Morrell ◽  
Ken P. Mingard
Keyword(s):  
Single Crystal ◽  
Crystal Orientation ◽  
Good Practice ◽  
Primary Crystal ◽  
Industrial Practice ◽  
Practice Guide ◽  
New Industry ◽  
Orientation Parameters ◽  
Made In

Control of single crystal orientation in modern gas turbine components is a critical quality control issue for optimum reliable behaviour, and an increasingly important aspect of trade. This paper reviews industrial practice for the determination of primary crystal orientation and for the determination of 'disorientation' (R-value) between sub-grains. Different techniques and measurement conventions are compared, and the errors of measurement have been assessed through a European round-robin. Causes of poor reproducibility in 'disorientation' measurement have been identified by EBSD investigations. Recommendations for unified practice have been made in a Good Practice Guide as a precursor to a new industry-wide standard.

scholarly journals Determination of Crystal Orientation by Ω-Scan Method in Nickel-Based Single-Crystal Turbine Blades

2017 ◽  
Vol 48 (11) ◽  
pp. 5200-5205 ◽  
Author(s):  
Kamil Gancarczyk ◽  
Robert Albrecht ◽  
Hans Berger ◽  
Dariusz Szeliga ◽  
Andrzej Gradzik ◽  
...  
Keyword(s):  
Single Crystal ◽  
Crystal Orientation ◽  
Turbine Blades

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

Effect of crystal orientation on droplet wetting behavior on single-crystal Al2O3 substrates: An experimental study

2020 ◽  
Vol 32 (12) ◽  
pp. 127110
Author(s):  
Chengyu He ◽  
Tie Liu ◽  
Lei Tian ◽  
Yubao Xiao ◽  
Shang Yuan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Single Crystal ◽  
Crystal Orientation ◽  
Wetting Behavior
Sign in / Sign up

Export Citation Format

Share Document