Local chemistry of a nanocrystalline high-strength Mg 97 Y 2 Zn 1 alloy
- 1 October 2002
- journal article
- research article
- Published by Informa UK Limited in Philosophical Magazine Letters
- Vol. 82 (10), 543-551
- https://doi.org/10.1080/0950083021000018652
Abstract
The local chemistry of a high-strength nanocrystalline Mg 97 Y 2 Zn 1 alloy produced by a rapidly solidified powder metallurgy process has been characterized by a three-dimensional atom probe (3DAP). The consolidated and extruded rod consists of hcp Mg grains of approximately 150nm size with their basal planes normal to the radial direction of the rod. 3DAP results revealed that the Y and Zn contents vary depending on the grains. Y- and Zn-depleted grains have a hcp structure, while Y- and Zn-enriched grains have a unique long-period stacking of the basal plane designated as 6H-Mg. In the 6H-Mg phase, the enrichment of Y and Zn occurs in one or two atomic layers in the unit cell. The chemical composition of the solute-enriched layer was estimated to be approximately 10 at.% Y and 3 at.% Zn using the 3DAP.Keywords
This publication has 7 references indexed in Scilit:
- Long-period ordered structure in a high-strength nanocrystalline Mg-1 at% Zn-2 at% Y alloy studied by atomic-resolution Z-contrast STEMActa Materialia, 2002
- Novel Hexagonal Structure of Ultra-High Strength Magnesium-Based AlloysMATERIALS TRANSACTIONS, 2002
- Novel hexagonal structure and ultrahigh strength of magnesium solid solution in the Mg–Zn–Y systemJournal of Materials Research, 2001
- Rapidly Solidified Powder Metallurgy Mg97Zn1Y2Alloys with Excellent Tensile Yield Strength above 600 MPaMATERIALS TRANSACTIONS, 2001
- Cast magnesium alloys for elevated temperature applicationsJournal of Materials Science, 1994
- The tomographic atom probe: A quantitative three-dimensional nanoanalytical instrument on an atomic scaleReview of Scientific Instruments, 1993
- Strengthening mechanisms in the rapidly solidified AZ 91 magnesium alloyScripta Metallurgica, 1989