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2 Zeszyty Naukowe. Elektryka / Politechnika Łódzka

2 2009

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Wavelet-based texture segmentation of titanium based alloy lamellar microstructure: application to images from optical microscope and X-ray microtomography

Babout L., Jopek Ł., Janaszewski M., Preuss M., Buffiere J-Y.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

2009

z. 114

181-187

A texture segmentation algorithm which combines grey level intensity from 2 images after discrete wavelet transform and variance has been applied on 2D images to segment lamellar colonies in (α+β) titanium alloy Ti6A14V. Images were acquired using both optical microscope and X-ray tomography. The results are satisfying for the former technique and encouraging for the latter one. Possible extension of the method to volumetric data is presented.

In situ experiments in X ray tomography using synchrotron and standard laboratory tomographs

Maire E., Adrien J., Carmona V., Buffiere J-Y., Courbon J.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

2009

z. 114

9-15

The paper describes different machines used in our group to perform in situ tests in X-ray tomography. Theses rigs are placed on the rotating stage of synchrotron or standard laboratory tomographs and allow deformation and temperature to be applied to the sample. X-ray tomography is then used to study the evolution of the internal structure of the materials. Monotonous tension and compression at room and high temperature, fatigue tension, cooling, heating stages have been successively developed over the past ten years. At the end of the paper, two examples are presented in the form of reconstructed slices acquired at different times during the experiments. One was obtained using a synchrotron and the other one using the standard laboratory tomograph.