2. Experimental
2.1. Materials
Zircaloy-4 alloys were bought from the State Nuclear Bao Ti
Zirconium Industry Company. The composition of Zircaloy-4 is Sn:
1.33 wt.%; Fe: 0.21 wt.%; Cr: 0.10 wt.%; Zr and impurities to balance.
The disk samples were cut by an electron discharge machine from
Zircaloy-4 rod. After being mechanically polished and washed with
ethanol, samples were heated to high temperatures for deuterium
absorption. The initial thickness of the disk samples was 0.8 mm
and the expansions in thickness of these samples after deuterium
absorption were measured by a micrometer.