Severely deformed ZK60 + 2.5% Mm alloy for hydrogen storage produced by two different processing routes

Microstructure and Hardness Evolution in Magnesium Processed by HPT

“…Many papers have reported the formation of ultrafine grained structures in pure magnesium [3][4][5][6] and AZ31 [7][8][9][10][11] , AZ61 12 , AZ80 13 , AZ91 [14][15][16] , ZK60 [17][18][19] , Mg-Zn-Y 20,21 , Mg-Gd-Y-Zr 22,23 , Mg-Zn-Ca [24][25][26][27] and Mg-Dy-Al-Zn-Zr 28 alloys. The processed alloys exhibit improved strength but also some papers report superplastic behaviour 16,19,22,29,30 , improved hydrogen storage properties 3,[31][32][33][34][35] and improved corrosion resistance 24,27,36 . Formation of ultrafine grained structures and improved strength are also observed in other metallic materials processed by HPT.…”

A Critical Review of Mg-Based Hydrogen Storage Materials Processed by Equal Channel Angular Pressing

“…As shown in Figure 5, the result also presented an increase in the kinetics for the first 50 cycles, after which it increased slightly for the next 150 cycles, and remained at that level up to at least 1000 cycles [24]. with CR, the hydrogen capacity could be highly promoted, which reached about 4 wt % of H2 [21]. Analogical results can be found in other studies, which suggests that the ECAP followed by CR could be a useful method in improving bulk magnesium hydrogen storage material.…”

“…The absorption measurement was conducted at 623 K and a hydrogen pressure of 20 bar (2 MPa). The result was quite interesting, showing that the samples after four ECAP passes provided relatively fast activation but a fairly small storage capacity about 2.5 wt % of H2 [21]. When ECAP was combined …”

“…The result was quite interesting, showing that the samples after four ECAP passes provided relatively fast activation but a fairly small storage capacity about 2.5 wt % of H 2 [21]. When ECAP was combined with CR, the hydrogen capacity could be highly promoted, which reached about 4 wt % of H 2 [21]. Analogical results can be found in other studies, which suggests that the ECAP followed by CR could be a useful method in improving bulk magnesium hydrogen storage material.…”

“…However, other research showed that processing ZK60 only by ECAP can barely improve the hydrogen storage capacity [21]. In the research of severely deformed ZK60 + 2.5% Mm alloy for hydrogen storage produced by two different processing routes, samples with the composition Mg5Zn1Zr2.5Mm were processed by both ECAP and a combination of ECAP and Cold Rolling (CR).…”