Characterisation of intermetallic phases in an Mg-Y-Ag-Zn casting alloy

摘要

The addition of Ag to Mg-Y-Zn alloys provides these alloys with the ability to develop a strong age-hardening response. In this work, the as-cast microstructure of an age-hardenable Mg-6Y-2Ag-1Zn-0.6Zr (wt%) alloy processed by conventional ingot metallurgy has been investigated by a transmission electron microscopy. Three distinct intermetallic phases are detected in the as-cast microstructure, two of which are similar to those phases present in the as-cast Ag-free Mg-Y-Zn alloys. The third is a previously unreported intermetallic phase associated with the additional element of Ag. The crystal structure of this phase is determined as diamond-cubic structure (a = 1.59 ± 0.01 nm, ). The dispersed particles of this phase often have a substructure of twinning on { 111} planes.View full textDownload full textKeywordsmagnesium alloys, crystal structure, intermetallic phasesRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/09500830903489595