IEAP - Institute of Experimental and Applied Physics

Partial tasks > Radiation Imaging in Material Science

Radiation Imaging in Material Science

Method “X Ray Dynamic Defectoscopy (XRDD)” uses Medipix device for the observation of time evolution of damage processes in a loaded specimen body. Even though the specimen is loaded monotonously and slowly, damaging can proceed discontinuously and relatively fast. Therefore high frame rate acquisition of X-ray images is crucial for real dynamic (time dependent) defectoscopy.

The method enables the observation of material density variations with micrometric accuracy. The test sample is illuminated by X rays during the loading process. Measured changes in transmission represent effective alterations in the sample thicknesses which are understood as weakening of the material due to damage volume fraction.

Sensitivity of the XRDD method depends on the ratio between incident and transmitted X ray beam intensity and on the fraction of scattered photons, the efficiency of the Medipix2 device at the X-ray energy used and the spectra of the X-ray tube.

Responsible person

Vavřík Daniel

IEAP

Co-workers

Jakůbek Martin	IEAP
Dammer Jiří	IEAP
Jakůbek Jan	IEAP
Jandejsek Ivan	IEAP

Grants:

Number	Name	Agency
LC06041	Research center "Fabrication, modification and characterization of materials by energetic radiation"	MŠMT
106/04/0567	Study of damage zone in high ductile materials in vicinity of crack tip by X-Ray Dynamic Defectoscopy method	GAČR
MSM 6840770040	Research Program 40: Usage of radionuclides and ionizing radiation.	MŠMT

Articles in Impacted Journals
(21)

Articles in Conference Proceedings
(17)

Thesis
(0)

Other publications
(3)

All
(41)

Table format

D. Vavřík, J. Jakůbek, T. Holý, "Microradiographic Observation of the Strain Field in Vicinity of the Crack Tip", 17th European Conference on Fracture, ISBN 978-80-214-3692-3, pp. 76-83 (2008)

D. Vavřík, T. Holý, J. Jakůbek, S. Pospíšil, Z. Vykydal, J. Dammer, "X-ray Micro Radiography Using Beam Hardening Correction", 2005 IEEE Nuclear Science Symposium Conference Record, Pages: 2989-2992 , doi: 10.1109/NSSMIC.2005.1596959

D. Vavřík, T. Holý, J. Jakůbek, M. Jakůbek, Z. Vykydal, "Microradiographic Observation of Material Damage Structure", 2006 IEEE Nuclear Science Symposium Conference Record, Pages: 1081-1083, doi: 10.1109/NSSMIC.2006.356034

D. Vavřík, J. Dammer, T. Holý, J. Jakůbek, M. Jakůbek, I. Jandejsek, "Radiography of Chaotically Moving Objects", AIP Vol. 958 (2007) 139-142

D. Vavřík, J. Jakůbek, "Micro-Radiographic Measurement of Material Damage Evolution", Conf. Proc. of New Methods of Damage and Failure Analysis of Structural Parts, ISBN 978-80-248-813-9, p. 331-337 (2008)

D. Vavřík, I. Jandejsek, "Method of Interpolated Ellipses Based on Image Correlation Technique", Engineering Mechanics 2008, ISBN 978-80-87012-11-6, pp. 252-253

J. Žemlička, J. Jakůbek, P. Soukup, "Energy Sensitive X-Ray Imaging with Pixel Stack Detector", Engineering Mechanics Conference proceedings, Svratka, Czech Rep., Paper #310, pp. 721–727 (2012)

F. Krejčí, J. Jakůbek, M. Slavíková, P. Kotlík, "Application of High-resolution X-Ray Radiography for Monitoring the Penetration Depth of Consolidants in Natural Building Stones ", Engineering Mechanics Conference proceedings, Svratka, Czech Rep., Paper #312, pp. 733–739 (2012)

D. Vavřík, J. Bryscejn, J. Jakůbek, J. Valach, "3D Measurement of the Strain Field Surrounding Crack Tip", European Conference of Fracture, p. 323-328. ISBN 1-4020-4971-4 (2006)

D. Vavřík, T. Holý, J. Jakůbek, M. Jakůbek, J. Bryscejn, V. Tichy, Z. Vykydal, J. Valach, "Radiographic Observation of Damage Zone Evolution in High Ductile Specimen", European Conference of Fracture, Pages: 323-328, ISBN 1-4020-4971-4 (2006)

D. Vavřík, J. Jakůbek, S. Pospíšil, J. Visschers, "Present status of X-ray dynamic defectoscopy", IEEE NSS 2003 Conf. Proc.

D. Vavřík, T. Holý, J. Jakůbek, M. Jakůbek, J. Valach, "Microradiographic Observation of Grainy Structure of Al Alloy", IEEE NSS Conf. Proc. (2007) N24-432

D. Vavřík, J. Jakůbek, "Material Analysis Using Characteristic Transmission Spectra", IEEE NSS/MIC Conf. Proc. (2008), N30-320

O. Valach, D. Vavřík, J. Bryscejn, J. Jakůbek, "Optical measurement of surface displacements in the vicinity of crack tip", Proc. of Engineering Mechanics 2006, p. 400-401. ISBN 80-86246-27-2

D. Vavřík, T. Holý, J. Jakůbek, M. Jakůbek, "Microadiographic Measurement of Moving Material Structures", Proceedings of International Symposium on Technology for Next Generation Vehicle & Machine (2007)

D. Vavřík, J. Jakůbek, J. Zemánková, "Crack Instability Analyzed by the Method of Interpolated Ellipses", Proceedings, SEM X Costa Mesa, California USA (2004)