White Beam Transmission Topography of Nickel-Based Alloy Single Crystal Turbine Blades using Synchrotron Radiation

1998 ◽  
pp. 431-436 ◽  
Author(s):  
John M. Winter ◽  
Robert E. Green ◽  
George Strabel
Keyword(s):  
Synchrotron Radiation ◽  
Single Crystal ◽  
Turbine Blades ◽  
Alloy Single Crystal ◽  
White Beam ◽  
Nickel Based Alloy ◽  
Beam Transmission

Optimization of x-ray Techniques for Nondestructive Characterization of Single Crystal Turbine Blades

1999 ◽  
Vol 591 ◽  
Author(s):  
J.M. Winter ◽  
K.G. Lipetzky ◽  
R.E. Green
Keyword(s):  
Single Crystal ◽  
Turbine Blades ◽  
Crystalline Perfection ◽  
X Ray ◽  
Diffraction Imaging ◽  
Nickel Based Alloy ◽  
Beam Transmission ◽  
Nondestructive Characterization

ABSTRACTThis paper describes nondestructive x-ray characterization techniques which detect macroscopic and microscopic defects, determine the overall crystallographic perfection, and detect any unwanted secondary crystals both on the external surface as well as in the interior of single crystal blades. The method of Asymmetric Crystal Topography for diffraction imaging the surfaces of single crystal turbine blades and the method of White Beam Transmission Topography for diffraction imaging through the thickness of single crystal turbine blades are both discussed and illustrated with representive diffraction images (topographs). It is clear that the images gained from these methods have a capability for providing information about the details of crystalline perfection (or lack thereof) in nickel-based alloy single crystal turbine blades. Such information can provide considerable leverage for the crystal grower to help in adjusting processing variables to enhance quality of a critical product. And the same methods of topography can conceiveably provide tools for evaluating the finished product in a way which has not been available to date.

Investigation of Crystallization Process of a Single Crystal Nickel-Based Alloy during the Laser Multilayer Cladding

2019 ◽  
Vol 822 ◽  
pp. 481-488
Author(s):  
R.S. Korsmik ◽  
Gleb A. Turichin ◽  
G.G. Zadykyan ◽  
Andrey Igorevich Zhitenev
Keyword(s):  
Single Crystal ◽  
Gas Turbine ◽  
Laser Cladding ◽  
Crystallization Process ◽  
Turbine Blades ◽  
Regression Equations ◽  
Microstructure Formation ◽  
Technological Parameters ◽  
Gas Turbine Blades ◽  
Nickel Based Alloy

The article shows the results of multilayer laser cladding of heat-resistant single crystal nickel-based alloy ZhS32-VI (CSMX-4 analogue). The influence of the main technological parameters on geometry and microstructure formation of deposited beads was investigated. Based on obtained dependencies, the regression equations are compiled for describing the shape of bead and the ratio of directional and equiaxial crystallized sections. The obtained dependencies of regime parameters nomination allow restoring the gas-turbine blades by the method of laser cladding.

Influence of Structure on the Formation of Dislocation in LBO Crystal

1995 ◽  
Vol 417 ◽  
Author(s):  
X. B. Hu ◽  
S. S. Jiang ◽  
X. R. Huang ◽  
W. Zeng ◽  
W. J. Liu ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Single Crystal ◽  
Structure Analysis ◽  
Low Density ◽  
Lattice Plane ◽  
White Beam ◽  
Loose Packing ◽  
Lbo Crystal

AbstractDislocations in LiB3O5(LBO) single crystal were investigated by white-beam synchrotron radiation topography(WBSRT). The WBSRT revealed that the grown-in dislocations are mainly pure screw or edge types with the Burgers vectors in the low index directions on (010) lattice plane. Based on the structure analysis, the formation cause of dislocations can be interpreted in terms of the loose packing of B-O rings and the low density of Li+ on (010) lattice plane.

Creep and damage of a Re/Ru-containing single crystal nickel-based alloy at high temperature

2021 ◽  
Vol 808 ◽  
pp. 140870
Author(s):  
Huajin Yan ◽  
Sugui Tian ◽  
Guoqi Zhao ◽  
Ning Tian ◽  
Shunke Zhang
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Nickel Based Alloy

Insituobservation of phase transition in potassium niobate single crystal by synchrotron radiation topography

1991 ◽  
Vol 59 (16) ◽  
pp. 1952-1953 ◽  
Author(s):  
Jiyong Zhao ◽  
Ping Yang ◽  
Shusheng Jiang ◽  
Xiaoming Jiang ◽  
Jianhua Jiang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Synchrotron Radiation ◽  
Single Crystal ◽  
Potassium Niobate

Refinement of the crystal structure of sieleckiite and revision of its symmetry

2017 ◽  
Vol 81 (4) ◽  
pp. 917-922
Author(s):  
Peter Elliott
Keyword(s):  
Crystal Structure ◽  
Synchrotron Radiation ◽  
Single Crystal ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
Aluminium Phosphate ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Phosphate Mineral

AbstractThe crystal structure of the copper aluminium phosphate mineral sieleckiite, Cu3Al4(PO4)2 (OH)12·2H2O, from the Mt Oxide copper mine, Queensland, Australia was solved from single-crystal X-ray diffraction data utilizing synchrotron radiation. Sieleckiite has monoclinic rather than triclinic symmetry as previously reported and is space group C2/m with unit-cell parameters a = 11.711(2), b = 6.9233(14), c = 9.828(2) Å, β = 92.88(3)°, V = 795.8(3) Å3and Z = 2. The crystal structure, which has been refined to R1 = 0.0456 on the basis of 1186 unique reflections with Fo > 4σF, is a framework of corner-, edge- and face- sharing Cu and Al octahedra and PO4 tetrahedra.

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