Please see the attached file

Another paper is

Kumar, N. & Szpunar, J. EBSD studies on microstructure and crystallographic orientation of delta-hydrides in Zircaloy-4, Zr-1% Nb and Zr-2.5% Nb. Mater. Sci. Engin., 2011, A 528, 6366-6374

There is also an application note from Oxford Instr. available ( Characterisation of Hydrides in a Zirconium Alloy, by EBSD. )

or a Phd thesis

Blackmur, M. S. The precipitation of hydrides in Zirconium Alloys University of Manchester, 2015

Thanks to both of you. I shall try these methods.

-bharat