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Microstructure and Mechanical Properties of AZ61 Magnesium Alloys with the Y and Ca Combined Addition.
- Source :
-
International Journal of Metalcasting . Oct2018, Vol. 12 Issue 4, p897-905. 9p. - Publication Year :
- 2018
-
Abstract
- In this paper, microstructure and mechanical properties of AZ61 magnesium alloys with the Y and Ca combined addition were investigated. The results exhibit that the addition of Y and Ca into AZ61 alloy leads to effective refinement of the microstructure and additional block-like Al2Y and long-rod Al2Ca phases found in AZ61-1.2Y alloy and AZ61-1.2Y-1.0Ca alloy, respectively. The tensile strength, elongation and creep properties of AZ61-Y-Ca alloy are significantly increased by the addition of Y and Ca. The tensile strength of AZ61-1.2Y-1.0Ca alloy at 20 and 175 °C is up to 225 and 175 MPa, and compared with AZ61 alloy, the strengths of the alloy are enhanced by 37 and 80%, respectively. AZ61-1.2Y-1.0Ca alloy achieves the lowest steady creep rate 2.5027 × 10−7 s−1 that is about 4 times lower than that of AZ61 alloy. The poor mechanical properties of AZ61 magnesium alloy is attributed to the softening of β-phase Mg17Al12, especially at elevated temperature. The tensile strength and creep resistance of AZ61-1.2Y-1.0Ca alloy are effectively improved by the Al2Ca and Al2Y phases. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MAGNESIUM alloys
*MICROSTRUCTURE
*MICROALLOYING
*CREEP (Materials)
*ALUMINUM alloys
Subjects
Details
- Language :
- English
- ISSN :
- 19395981
- Volume :
- 12
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- International Journal of Metalcasting
- Publication Type :
- Academic Journal
- Accession number :
- 132222640
- Full Text :
- https://doi.org/10.1007/s40962-018-0222-7