TY - JOUR

T1 - Effect of cold rolling on the structure and hydrogen properties of AZ91 and AM60D magnesium alloys processed by ECAP

AU - Jorge, Alberto Moreira

AU - Prokofiev, Egor

AU - Triques, Maria Regina Martins

AU - Roche, Virginie

AU - Botta, Walter José

AU - Kiminami, Claudio Shyinti

AU - Raab, Georgy I.

AU - Valiev, Ruslan Z.

AU - Langdon, Terence G.

PY - 2017/8/24

Y1 - 2017/8/24

N2 - This investigation was conducted to evaluate the effect of cold rolling on the structure and hydrogen properties of two magnesium alloys, AZ91 and AM60D, after processing by equal-channel angular pressing (ECAP). The results show that the use of cold rolling after ECAP significantly increases the preferential texture for hydrogenation and increases the potential for the use of these alloys as hydrogen storage materials. The ECAP was performed through two different numbers of passes in order to give different grain sizes and both materials were subsequently cold-rolled through the same numbers of passes for a comparison of the hydrogenation absorption. It is shown that the hydriding properties are enhanced by an (0001) texture which improves the kinetics primarily in the initial stages of hydrogenation. The results demonstrate that optimum sorption properties may be acquired through a combination of fine grains and appropriate texture.

AB - This investigation was conducted to evaluate the effect of cold rolling on the structure and hydrogen properties of two magnesium alloys, AZ91 and AM60D, after processing by equal-channel angular pressing (ECAP). The results show that the use of cold rolling after ECAP significantly increases the preferential texture for hydrogenation and increases the potential for the use of these alloys as hydrogen storage materials. The ECAP was performed through two different numbers of passes in order to give different grain sizes and both materials were subsequently cold-rolled through the same numbers of passes for a comparison of the hydrogenation absorption. It is shown that the hydriding properties are enhanced by an (0001) texture which improves the kinetics primarily in the initial stages of hydrogenation. The results demonstrate that optimum sorption properties may be acquired through a combination of fine grains and appropriate texture.

KW - Equal-channel angular pressing

KW - Hydrogen storage

KW - Magnesium alloys

KW - Severe plastic deformation

KW - Ultrafine grains

UR - http://www.scopus.com/inward/record.url?scp=85026661077&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2017.07.118

DO - 10.1016/j.ijhydene.2017.07.118

M3 - Article

AN - SCOPUS:85026661077

VL - 42

SP - 21822

EP - 21831

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 34

ER -