Abstract
A new Mg-RE-Zn-Al alloy reinforced with the second phase of Mg12(RE) has been developed to enhance mechanical properties at the elevated temperatures. When the alloy solidifies with a relatively high cooling rate under the pressure applied, an extremely fine α-Mg phase with a completely closed network of the second phase of Mg12(RE) is developed. The reinforcing network restricts grain boundary sliding during deformation, resulting in a high yield strength of 150 MPa at 150 °C. Furthermore, the refined alloy exhibits around 27 % elongation to failure at 150 °C. This indicates that the failure behavior cannot be affected by the effects of residual stresses induced during solidification and stress concentrations developed near the second phase during deformation.
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Shin, B.S., Kwon, J.W. & Bae, D.H. Microstructure and deformation behavior of a Mg-RE-Zn-Al alloy reinforced with the network of a Mg-RE phase. Met. Mater. Int. 15, 203–207 (2009). https://doi.org/10.1007/s12540-009-0203-8
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DOI: https://doi.org/10.1007/s12540-009-0203-8