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Effect of solution treatment on microstructure and hardness of rheo-forming AZ91-Y alloy.
- Source :
- China Foundry; Nov2016, Vol. 13 Issue 6, p383-388, 6p
- Publication Year :
- 2016
-
Abstract
- The microstructure and hardness of rheo-forming AZ91-Y alloy before and after solution treatment (ST) have been investigated by means of optical microscope (OM), scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Vickers. The experimental results showed that the β-Mg<subscript>17</subscript>Al<subscript>12</subscript> phase of alloy was nearly dissolved after ST for 5 min. With the increasing of ST duration to 28 h, both the primary and secondarily solidified α-Mg grains faded away. At the same time, the alloy exhibited a much smoother surface due to the diffusion of solute atoms (Al). During ST, the thermal stable phase of Al<subscript>2</subscript>Y produced by ultrasonic vibration retained its size and morphology. As the ST duration was increased, the alloy hardness decreased sharply at first, and then gradually reached a minimum level. The alloy's appropriate ST duration at 410 °C was approximately 28 h. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16726421
- Volume :
- 13
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- China Foundry
- Publication Type :
- Academic Journal
- Accession number :
- 120179283
- Full Text :
- https://doi.org/10.1007/s41230-016-6053-3