Brazing. Non-destructive examination of brazed joints

2000 ◽  
Keyword(s):  
Brazed Joints ◽  
Non Destructive

Non-destructive evaluation of brazed joints between cooling tube and heat sink by IR thermography and its verification using FE analysis

2006 ◽  
Vol 39 (2) ◽  
pp. 88-95 ◽  
Author(s):  
Paritosh Chaudhuri ◽  
P. Santra ◽  
Sandeep Yoele ◽  
Arun Prakash ◽  
D.Chenna Reddy ◽  
...  
Keyword(s):  
Heat Sink ◽  
Fe Analysis ◽  
Ir Thermography ◽  
Non Destructive Evaluation ◽  
Cooling Tube ◽  
Brazed Joints ◽  
Non Destructive

NON-DESTRUCTIVE EXAMINATIONS, CHARACTERIZATION AND TECHNOLOGY IMPROVEMENT OF BRAZED JOINTS FOR PLASMA FACING COMPONENTS

1993 ◽  
pp. 339-343
Author(s):  
G. PERSANO ADORNO ◽  
P. POGGI ◽  
U. GUERRESCHI ◽  
N. PIETRANERA ◽  
A. ROSSANI ◽  
...  
Keyword(s):  
Plasma Facing Components ◽  
Technology Improvement ◽  
Brazed Joints ◽  
Non Destructive

scholarly journals Multisensor Inspection of Laser-Brazed Joints in the Automotive Industry

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7335
Author(s):  
Miguel A. Machado ◽  
Luís S. Rosado ◽  
Nuno M. Mendes ◽  
Rosa M. Miranda ◽  
Telmo G. Santos
Keyword(s):  
Automotive Industry ◽  
Experimental Validation ◽  
Potential Drop ◽  
Superior Performance ◽  
Inspection System ◽  
Process Variables ◽  
Laser Brazing ◽  
Complex Process ◽  
Brazed Joints ◽  
Non Destructive

Automobile laser brazing remains a complex process whose results are affected by several process variables that may result in nonacceptable welds. A multisensory customized inspection system is proposed, with two distinct non-destructive techniques: the potential drop method and eddy current testing. New probes were designed, simulated, produced, and experimentally validated in automobile’s laser-brazed weld beads with artificially introduced defects. The numerical simulations allowed the development of a new four-point probe configuration in a non-conventional orthogonal shape demonstrating a superior performance in both simulation and experimental validation. The dedicated inspection system allowed the detection of porosities, cracks, and lack of bonding defects, demonstrating the redundancy and complementarity these two techniques provide.

scholarly journals New directions for inline inspection of automobile laser welds using non-destructive testing

2021 ◽  
Author(s):  
Miguel Araújo Machado ◽  
Luís Filipe Soldado Granadeiro Rosado ◽  
Nuno Alberto Marques Mendes ◽  
Rosa Maria Mendes Miranda ◽  
Telmo Jorge Gomes dos Santos
Keyword(s):  
Eddy Current ◽  
Surface Defects ◽  
Inspection System ◽  
Destructive Testing ◽  
Control Paradigm ◽  
Laser Welds ◽  
Welding Defects ◽  
Surface Welding ◽  
Brazed Joints ◽  
Non Destructive

AbstractAn innovative pilot installation and eddy current testing (ECT) inspection system for laser-brazed joints is presented. The proposed system detects both surface and sub-surface welding defects operating autonomously and integrated with a robotized arm. Customized eddy current probes were designed and experimentally validated detecting pore defects with 0.13 mm diameter and sub-surface defects buried 1 mm deep. The integration of the system and the manufacturing process towards an Industry 4.0 quality control paradigm is also discussed.

Luminescence from individual dislocations in II-VI and III-V semiconductors

1991 ◽  
Vol 49 ◽  
pp. 834-835
Author(s):  
J W Steeds
Keyword(s):  
Group Iv ◽  
Luminescence Properties ◽  
Carrier Recombination ◽  
Transmission Electron ◽  
Wide Range ◽  
Basic Physics ◽  
Semiconducting Compounds ◽  
Diamond Group ◽  
Non Destructive ◽  
Technological Significance

There is a wide range of experimental results related to dislocations in diamond, group IV, II-VI, III-V semiconducting compounds, but few of these come from isolated, well-characterized individual dislocations. We are here concerned with only those results obtained in a transmission electron microscope so that the dislocations responsible were individually imaged. The luminescence properties of the dislocations were studied by cathodoluminescence performed at low temperatures (~30K) achieved by liquid helium cooling. Both spectra and monochromatic cathodoluminescence images have been obtained, in some cases as a function of temperature.There are two aspects of this work. One is mainly of technological significance. By understanding the luminescence properties of dislocations in epitaxial structures, future non-destructive evaluation will be enhanced. The second aim is to arrive at a good detailed understanding of the basic physics associated with carrier recombination near dislocations as revealed by local luminescence properties.

Forensic Identifications Aided by Scanning Electron Microscopy of Silicone-Epoxy Microreplicas of Calcified and Cornified Structures

1975 ◽  
Vol 33 ◽  
pp. 678-679 ◽  
Author(s):  
R.F. Sognnaes
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Forensic Science ◽  
George Washington ◽  
Epithelial Surface ◽  
Extended Application ◽  
Tissue Surfaces ◽  
Non Destructive ◽  
Scanning Electron ◽  
Surface Changes

Sufficient experience has been gained during the past five years to suggest an extended application of microreplication and scanning electron microscopy to problems of forensic science. The author's research was originally initiated with a view to develop a non-destructive method for identification of materials that went into objects of art, notably ivory and ivories. This was followed by a very specific application to the identification and duplication of the kinds of materials from animal teeth and tusks which two centuries ago went into the fabrication of the ivory dentures of George Washington. Subsequently it became apparent that a similar method of microreplication and SEM examination offered promise for a whole series of problems pertinent to art, technology and science. Furthermore, what began primarily as an application to solid substances has turned out to be similarly applicable to soft tissue surfaces such as mucous membranes and skin, even in cases of acute, chronic and precancerous epithelial surface changes, and to post-mortem identification of specific structures pertinent to forensic science.

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