scholarly journals A Method for Measuring Strain by Analyzing Sharpness of ECP With Image Analysis

1994 ◽  
Vol 22 (4) ◽  
pp. 199-218 ◽  
Author(s):  
Y. Yoshitomi ◽  
K. Ohta ◽  
J. Harase ◽  
Y. Suga
Keyword(s):  
Image Analysis ◽  
Single Crystal ◽  
Crystal Orientation ◽  
Alloy Single Crystal ◽  
Line Broadening ◽  
X Ray ◽  
Electron Channeling ◽  
First Order ◽  
Relative Value ◽  
Strain Change

A method for measuring strain by analyzing sharpness of Electron Channeling Pattern (ECP) with Image analysis has been newly developed. The relative value of sharpness of first-order pseudo-Kikuchi line in ECP is used as a parameter of strain. Strain change of Fe-3.25%Si alloy single crystal and polycrystal during deformation and recrystallization was analyzed by this method. This method was compared with the conventional methods; hardness and line broadening of X-ray. This method can be used for measuring strain in material with any crystal orientation.

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.

X-ray topography and crystal orientation study of a nickel-based CMSX-4 superalloy single crystal

2010 ◽  
Vol 45 (12) ◽  
pp. 1326-1332 ◽  
Author(s):  
A. Onyszko ◽  
W. Bogdanowicz ◽  
K. Kubiak ◽  
J. Sieniawski
Keyword(s):  
Single Crystal ◽  
Crystal Orientation ◽  
X Ray ◽  
Orientation Study ◽  
Superalloy Single Crystal

An Ultrahigh-Temperature, Single-Crystal Texture Camera Diffractometer*

1964 ◽  
Vol 8 ◽  
pp. 86-90
Author(s):  
Robert L. Prickett
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Ion Beam ◽  
Sample Surface ◽  
Refractory Materials ◽  
X Ray ◽  
First Order ◽  
Crystal Texture ◽  
Ultrahigh Temperature ◽  
Electronic Detector

AbstractA single-crystal high-temperature X-ray camera has been built with permissible operating temperatures of 2500°C. The camera is constructed to rest upon a Siemens horizontal diffractometer and may be used with either an external electronic detector or with film. The sample is supported on an externally adjustable goniometer head and is heated from the back by an ion beam. Controlled oscillation allows rotation photographs to be obtained from the sample surface not touched by the ion stream. Temperature is controlled by a thermocouple supporting the sample, the thermocouple being an intrinsic part of the goniometer. As a design limit, zero and first order layer lines with iron Kα. radiation on specimens with lattice parameters of 2.6 Å or larger may be recorded. Copper, cobalt, and molybdenum radiation allow even greater latitude. Types of samples that may be studied include powder (pellet), single crystal, wire, or rod. The camera serves equally well for single-crystal, texture, or powder studies on refractory materials.

scholarly journals Probing single crystal orientation by X-ray diffraction for nickel-based superalloys

2021 ◽  
Vol 29 ◽  
pp. 104769
Author(s):  
Yumin Wang ◽  
Zhongli Liu ◽  
Liang Qiao ◽  
Shuangming Li
Keyword(s):  
Single Crystal ◽  
Crystal Orientation ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals High pO2 Floating Zone Crystal Growth of the Perovskite Nickelate PrNiO3

Crystals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 324 ◽  
Author(s):  
Hong Zheng ◽  
Junjie Zhang ◽  
Bixia Wang ◽  
Daniel Phelan ◽  
Matthew J. Krogstad ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Single Crystal ◽  
Floating Zone ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Single Crystal Diffraction ◽  
Metal Insulator ◽  
X Ray ◽  
First Order ◽  
Correlated Electron

Single crystals of PrNiO3 were grown under an oxygen pressure of 295 bar using a unique high-pressure optical-image floating zone furnace. The crystals, with volume in excess of 1 mm3, were characterized structurally using single crystal and powder X-ray diffraction. Resistivity, specific heat, and magnetic susceptibility were measured, all of which evidenced an abrupt, first order metal-insulator transition (MIT) at ~130 K, in agreement with previous literature reports on polycrystalline specimens. Temperature-dependent single crystal diffraction was performed to investigate changes through the MIT. Our study demonstrates the opportunity space for high fugacity, reactive environments for single crystal growth specifically of perovskite nickelates but more generally to correlated electron oxides.

X-ray Fluorescence Holography for a Ti–Nb Binary Alloy Consisting of the Martensite, Austenite and Omega Phase

2016 ◽  
Vol 230 (4) ◽  
Author(s):  
Tokujiro Yamamoto ◽  
Kouichi Hayashi ◽  
Naohisa Happo ◽  
Shinya Hosokawa
Keyword(s):  
Single Crystal ◽  
Binary Alloy ◽  
Atomic Structure ◽  
Local Atomic Structure ◽  
Alloy Single Crystal ◽  
Omega Phase ◽  
X Ray

AbstractThe local atomic structure near an Nb atom in a Ti–20 at. %Nb alloy single crystal, which consists of the

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