Morphology and crystallography of beta precipitate phase in Mg-Gd-Y-Nd-Zr alloy

作者：Li Ting; Du Zhi wei; Zhang Kui^*; Li Xing gang; Yuan Jia wei; Li Yong jun; Ma Ming long; Shi Guo liang

来源：Transactions of Nonferrous Metals Society of China, 2012, 22(12): 2877-2882.

DOI：10.1016/S1003-6326(11)61545-8

• Mg-Gd-Y-Nd-Zr alloy
• precipitation phase
• microstructure
• composition
• orientation relationship
• habit plane

Morphology and crystal structure of beta precipitate phase in Mg-7Gd-5Y-1Nd-0.5Zr (mass fraction, %) alloy were characterized by optical microscopy, scanning electron microscopy and transmission electron microscopy. Compositions were determined for beta phase using thin foil energy dispersive spectroscopy. Precipitation at 400 degrees C involves formation of (1 (1) over bar 00)(alpha) platelet and block-shaped beta phase. The orientation relationship is ((2) over bar 11)(beta)//(01 (1) over bar0)(alpha) and [0 (1) over bar1](beta)//[0001](alpha) between beta precipitate phase and alpha-Mg matrix with habit planes parallel to ((1) over bar 100)(alpha), and a composition of Mg-5(Y0.4Gd0.4Nd0.2) is suggested for the beta phase in Mg-7Gd-5Y-1Nd-0.5Zr alloy.

• 出版日期2012-12
• 单位北京有色金属研究总院