28 June 2015 to 3 July 2015
Africa/Johannesburg timezone
SAIP2015 Proceeding published on 17 July 2016

Microstructural analysis of proton irradiated zircaloy-4

30 Jun 2015, 16:10
1h 50m
Board: A.304
Poster Presentation Track A - Division for Physics of Condensed Matter and Materials Poster1

Speaker

Mr Tshepo Mahafa (University of Johannesburg and Necsa)

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

To help understand the microstructural evolution of reactor materials under neutron irradiation, charged particle irradiation of materials in an accelerator environment are carried out. Charged particles have been shown to produce damage effects equivalent to those of neutrons in materials. In this experiment, zircaloy-4 in tubular form was exposed to a pulsed proton beam in a radio frequency quadrupole (RFQ) accelerator at the South African Nuclear Energy Corporation (Necsa). The sample was irradiated to a total dose of 1.19x10E19 ions /cm2. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD) were used to characterize the induced changes in the materials microstructure. With XRD, a reversal of the residual stress and grain growth were observed after proton irradiation. SEM and TEM revealed crack formation in the microstructure plus grain growth as revealed by XRD.

Main supervisor (name and email)<br>and his / her institution

Emanuella Carleschi, ecarleschi@uj.ac.za, University of Johannesburg

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Primary author

Mr Tshepo Mahafa (University of Johannesburg and Necsa)

Co-authors

Dr Chris Franklyn (Necsa) Dr Emanuela Carleschi (Department of Physics, University of Johannesburg) Mr Graham Daniels (Necsa)

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