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Investigation of two-phase Mg-Gd-Ni alloys with highly stable long period stacking ordered phases.
- Source :
-
Intermetallics . Jan2016, Vol. 68, p63-70. 8p. - Publication Year :
- 2016
-
Abstract
- The effects of the Ni addition on the microstructures of Mg-2Gd-xNi (at.%, x = 0, 0.25, 0.5 and 1) alloys were systematically investigated. A series of two-phase Mg-Gd-Ni alloys consisting of long period stacking ordered (LPSO) phase and α-Mg were obtained. The LPSO phase presented block-like shape and was distributed between α-Mg dendrite arms. Its volume fraction was found to be proportional to the Ni content, ranging from 0 to ∼40% with the Ni content increasing from 0 to 1 at.%. After a heat treatment at 500 °C for 100 h, the LPSO phase experienced a structure transformation from 18R to 14H but was hardly dissolved into the α-Mg matrix, which evidenced a high thermal stability. The mechanism for the effects of the Ni addition on the formation of the LPSO phase was discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09669795
- Volume :
- 68
- Database :
- Academic Search Index
- Journal :
- Intermetallics
- Publication Type :
- Academic Journal
- Accession number :
- 110599891
- Full Text :
- https://doi.org/10.1016/j.intermet.2015.09.006