Influences of AlN/Al Nanoparticles on the Creep Properties of Elektron21 Prepared by High Shear Dispersion Technology
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In: JOM: Journal of The Minerals, Metals & Materials Society, Vol. 71, No. 7, 15.07.2019, p. 2245-2252.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Influences of AlN/Al Nanoparticles on the Creep Properties of Elektron21 Prepared by High Shear Dispersion Technology
AU - Yang, Hong
AU - Huang, Yuanding
AU - Gavras, Sarkis
AU - Kainer, Karl Ulrich
AU - Hort, Norbert
AU - Dieringa, Hajo
PY - 2019/7/15
Y1 - 2019/7/15
N2 - Elektron21 (E21) and its composites with additions of 0.25 wt.%, 0.5 wt.%, and 1 wt.% AlN/Al nanoparticles (NPs) were fabricated by a high shear dispersion technology. Their creep properties were investigated over a stress range between 80 MPa and 140 MPa at 240°C. The grain size exhibits an obvious increase with the addition of AlN/Al NPs compared with the monolithic E21 alloy. Increasing the content of AlN/Al NPs leads to a pronounced improvement of creep resistance. Microstructural analysis shows that, with the addition of 1% AlN/Al NPs in E21, the distribution of the intermetallics Mg3RE becomes much more homogeneous and their size is reduced. Such Mg3RE particles can prevent the dislocation slip more efficiently during creep. Besides these Mg3RE particles, the additional formation of Al2RE and Al2Zr3 phases, which results from the reactions of AlN/Al NPs and the alloying elements Zr and REs, could act as thermal stable particles to improve the creep resistance. Finally, the remained AlN NPs without reactions are beneficial for the improvement of the creep resistance to some extent due to Orowan strengthening.
AB - Elektron21 (E21) and its composites with additions of 0.25 wt.%, 0.5 wt.%, and 1 wt.% AlN/Al nanoparticles (NPs) were fabricated by a high shear dispersion technology. Their creep properties were investigated over a stress range between 80 MPa and 140 MPa at 240°C. The grain size exhibits an obvious increase with the addition of AlN/Al NPs compared with the monolithic E21 alloy. Increasing the content of AlN/Al NPs leads to a pronounced improvement of creep resistance. Microstructural analysis shows that, with the addition of 1% AlN/Al NPs in E21, the distribution of the intermetallics Mg3RE becomes much more homogeneous and their size is reduced. Such Mg3RE particles can prevent the dislocation slip more efficiently during creep. Besides these Mg3RE particles, the additional formation of Al2RE and Al2Zr3 phases, which results from the reactions of AlN/Al NPs and the alloying elements Zr and REs, could act as thermal stable particles to improve the creep resistance. Finally, the remained AlN NPs without reactions are beneficial for the improvement of the creep resistance to some extent due to Orowan strengthening.
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85065551507&partnerID=8YFLogxK
U2 - 10.1007/s11837-019-03499-4
DO - 10.1007/s11837-019-03499-4
M3 - Journal articles
AN - SCOPUS:85065551507
VL - 71
SP - 2245
EP - 2252
JO - JOM: Journal of The Minerals, Metals & Materials Society
JF - JOM: Journal of The Minerals, Metals & Materials Society
SN - 1047-4838
IS - 7
ER -