TY - GEN
T1 - Study on mechanical properties and microstructures of Mg-6Zn-2Gd-0.6Zr new sand-casting magnesium alloy
AU - Guangyu, Yang
AU - Jiehua, Li
AU - Wanqi, Jie
AU - Zhong, Yu
PY - 2010
Y1 - 2010
N2 - A new composition sand-casting magnesium alloy, Mg-6Zn-2Gd-0.6Zr, was developed. It was found that the room temperature mechanical properties of the alloy were superior: σb=270MPa, σ0 .2=175MPa, δ=8%. Meanwhile, the elevated-temperature strength and creep resistance were significantly improved, comparing with Mg-5Zn-0.6Zr (ZK51) commercial magnesium alloy. The as-cast microstructure of the alloy was mainly consisted of α(Mg) matrix, (α+Mg3Gd2Zn3+Mg 3Gd) eutectic phase, which was distributed along the α(Mg) grain boundary with coarse netted shape. After solid-solution treatment and subsequently aging treatment for the alloy, the secondary phases re-precipitated as fine discontinues semi-netted or short rod-like precipitations, also including some fine spherical precipitations in the αsmatrix, which were responsible for the properties improvement of the alloy.
AB - A new composition sand-casting magnesium alloy, Mg-6Zn-2Gd-0.6Zr, was developed. It was found that the room temperature mechanical properties of the alloy were superior: σb=270MPa, σ0 .2=175MPa, δ=8%. Meanwhile, the elevated-temperature strength and creep resistance were significantly improved, comparing with Mg-5Zn-0.6Zr (ZK51) commercial magnesium alloy. The as-cast microstructure of the alloy was mainly consisted of α(Mg) matrix, (α+Mg3Gd2Zn3+Mg 3Gd) eutectic phase, which was distributed along the α(Mg) grain boundary with coarse netted shape. After solid-solution treatment and subsequently aging treatment for the alloy, the secondary phases re-precipitated as fine discontinues semi-netted or short rod-like precipitations, also including some fine spherical precipitations in the αsmatrix, which were responsible for the properties improvement of the alloy.
KW - Creep resistance
KW - Magnesium alloy
KW - Mechanical properties
KW - Microstructure
KW - Sand-cast
UR - http://www.scopus.com/inward/record.url?scp=77955490085&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.654-656.651
DO - 10.4028/www.scientific.net/MSF.654-656.651
M3 - 会议稿件
AN - SCOPUS:77955490085
SN - 0878492550
SN - 9780878492558
T3 - Materials Science Forum
SP - 651
EP - 654
BT - PRICM7
PB - Trans Tech Publications Ltd
T2 - 7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
Y2 - 2 August 2010 through 6 August 2010
ER -