This paper reports long-term hydrogen storage experiments on MgH 2 and on the Mg alloy
ZK60 following prior Severe Plastic Deformation (SPD). Although SPD processing leads to
significant enhancements of hydrogen absorption and desorption rates in both materials,
these are not necessarily stable with respect to repeated loading/unloading cycles. Cold
rolled (CR) MgH 2 shows a reduction of capacity by 30% after 100 cycles. In contrast, in
ZK60 (Mg-5Zn-0.8 Zr) processed by High Pressure Torsion (HPT), both kinetics and storage …

Long-term hydrogen storage experiments are discussed, which were performed on MgH 2
and on the Mg alloy ZK60 following prior Severe Plastic Deformation (SPD). Although SPD
processing leads to significant enhancement of hydrogen absorption and desorption rates in
both materials, these are not necessarily stable with respect to repeated loading/unloading
cycles. Cold Rolled (CR) MgH 2, eg, shows a reduction of capacity by 30% after 100 cycles.
In contrast, in ZK60 (Mg-5Zn-0.8 Zr) processed by High Pressure Torsion (HPT), both …