The Effect of Solid Solute and Precipitate Phase on Young's Modulus of Binary Mg–RE Alloys
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In: Advanced Engineering Materials, Vol. 20, No. 10, 1800271, 10.2018.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - The Effect of Solid Solute and Precipitate Phase on Young's Modulus of Binary Mg–RE Alloys
AU - Xu, Yu Ling
AU - Wang, Li
AU - Huang, Meng
AU - Gensch, Felix
AU - Kainer, Karl Ulrich
AU - Hort, Norbert
PY - 2018/10
Y1 - 2018/10
N2 - The Young's modulus for a series of binary Mg–Gd and Mg–Nd alloys are studied in the present work. Fine and homogeneous grain structures are prepared by using hot extrusion. The results demonstrate that the Young's modulus of Mg–Gd alloys increase linearly by the increase of Gd in solid solution. Aging treatments are applied to the Mg–0.79–2.43 at% Gd alloys. A needle-like orthorhombic structure β′ phase is formed in Mg matrix. Due to a higher Young's modulus of the intermetallic β′ phase which is estimated to be 80 GPa, the Young's modulus of Mg–Gd alloys are enhanced by aging. The results for Mg–Nd alloys indicate that Young's modulus firstly decreases and reaches 42.53 GPa for Mg–0.18 at% Nd which is attributed to the solid solution of Nd in Mg. The Mg41Nd5 particles appear in Mg matrix when Nd content is higher than 0.18 at%, and Young's modulus of the particles is tested as 57.0 GPa. Thus, the Young's modulus increases to 43.42 GPa for Mg–0.63 at% Nd. The Young's modulus of Mg alloys are affected by altering the crystal cell parameters with solid solutes, and/or the formation of precipitate phases with varying amounts.
AB - The Young's modulus for a series of binary Mg–Gd and Mg–Nd alloys are studied in the present work. Fine and homogeneous grain structures are prepared by using hot extrusion. The results demonstrate that the Young's modulus of Mg–Gd alloys increase linearly by the increase of Gd in solid solution. Aging treatments are applied to the Mg–0.79–2.43 at% Gd alloys. A needle-like orthorhombic structure β′ phase is formed in Mg matrix. Due to a higher Young's modulus of the intermetallic β′ phase which is estimated to be 80 GPa, the Young's modulus of Mg–Gd alloys are enhanced by aging. The results for Mg–Nd alloys indicate that Young's modulus firstly decreases and reaches 42.53 GPa for Mg–0.18 at% Nd which is attributed to the solid solution of Nd in Mg. The Mg41Nd5 particles appear in Mg matrix when Nd content is higher than 0.18 at%, and Young's modulus of the particles is tested as 57.0 GPa. Thus, the Young's modulus increases to 43.42 GPa for Mg–0.63 at% Nd. The Young's modulus of Mg alloys are affected by altering the crystal cell parameters with solid solutes, and/or the formation of precipitate phases with varying amounts.
KW - Mg-RE alloy
KW - precipitate phase
KW - solid solute
KW - Young's modulus
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85050848923&partnerID=8YFLogxK
U2 - 10.1002/adem.201800271
DO - 10.1002/adem.201800271
M3 - Journal articles
AN - SCOPUS:85050848923
VL - 20
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
SN - 1438-1656
IS - 10
M1 - 1800271
ER -