In-situ loading on defect containing material observed under high-resolution tomograph

Ahmed Ubaid

Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, 180 00 Praha 8

NiTi possess unique shape memory and pseudoelastic characteristics. In this research, a dog-bone shaped sample of NiTi is being analysed under X-ray Computed Tomography. Deformation characteristics of NiTi have been studied due to their increased demand in the miniaturized applications. The in-situ tensile testing was performed at -20C with different load i.e., 10N, 150N, 220N and 300N using Deben chamber of Xradia Versa 610, Zeiss. The sample had 4.2mm gauge length, 1mm width and 1mm height. The reconstructed images and large number of pores/inclusions were being analysed using DragonFly software. Images obtained under different loading were compared, dimensional changes in the pores/inclusions were determined as well as changes in the distances amongst different pores were calculated. The sample showed 1% deformation at 150N, 3.80% at 220N and 5.4% deformation at 300N.

Figure 1. Different size pores shown with different colours at 220N and -20˚C

[1] Otani, J., & Obara, Y. (Eds.). (2004). Xray CT for Geomaterials: Soils, Concrete, Rocks International Workshop on Xray CT for Geomaterials, Kumamoto, Japan. CRC Press.

In-situ loading on defect containing material observed under high-resolution tomograph

Ahmed Ubaid

Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, 180 00 Praha 8

Figure 1. Different size pores shown with different colours at 220N and -20˚C

[1] Otani, J., & Obara, Y. (Eds.). (2004). Xray CT for Geomaterials: Soils, Concrete, Rocks International Workshop on Xray CT for Geomaterials, Kumamoto, Japan. CRC Press.

[2] Carmignato, S., Dewulf, W., & Leach, R. (Eds.). (2018). Industrial X-ray computed tomography. Cham: Springer International Publishing.