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

Soyama, Juliano; Floriano, Ricardo; Leiva, Daniel Rodrigo; Guo, Yuhua; Jorge, Alberto Moreira; Silva, Erenilton Pereira da; Pinto, Haroldo Cavalcanti; Bolfarini, Claudemiro; Kiminami, Cláudio Shyinti

doi:10.1016/j.ijhydene.2016.05.031

Cited by 26 publications

(14 citation statements)

References 43 publications

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“…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.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Hardness Evolution in Magnesium Processed by HPT

et al. 2017

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High pressure torsion provides an opportunity to process materials with low formability such as magnesium at room temperature. The present work shows the microstructure evolution in commercially pure magnesium processed using a pressure of 6.0 GPa up to 10 turns of rotation. The microstructure evolution is evaluated using electron microscopy and the hardness is determined using dynamic hardness testing. The results show that the grain refinement mechanism in this material differs from materials with b.c.c. and f.c.c. structures. The mechanism of grain refinement observed at high temperatures also applies at room temperature. The hardness distribution is heterogeneous along the longitudinal section of the discs and is not affected by the amount of deformation imposed to the material.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Hardness Evolution in Magnesium Processed by HPT

et al. 2017

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“…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.…”

Section: Cycling Stabilitymentioning

confidence: 81%

“…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 …”

Section: Capacitymentioning

confidence: 98%

“…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.…”

Section: Capacitymentioning

confidence: 98%

“…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).…”

Section: Capacitymentioning

confidence: 99%

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

Lisha

Jiang

et al. 2017

Metals

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Abstract:As a kind of cost-efficient hydrogen storage materials with high hydrogen capacity and light weight, Mg-based alloys have attracted much attention. This review introduces an effective technique in producing bulk ultrafine-grained (UFG) Mg alloys and promoting its hydrogen storage property, namely, equal-channel angular pressing (ECAP). This paper briefly describes the technical principle of ECAP and reviews the research progress on hydrogen storage properties of ECAP-processed Mg alloys. Special attention is given to their hydrogen storage behaviors including hydrogen storage dynamics, capacity, and cycling stability. Finally, it analyzes the factors that affect the hydrogen storage properties of ECAP-processed Mg alloys, such as the grain sizes, lattice defects, catalysts, and textures introduced by ECAP process.

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