| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2023
|
| Presentation Title |
The Mechanisms to Improve Creep Resistance in a Die-cast MgREMnAl Alloy |
| Author(s) |
Xixi Dong, Lingyun Feng, Eric Nyberg, Shouxun Ji |
| On-Site Speaker (Planned) |
Shouxun Ji |
| Abstract Scope |
High-pressure die-cast magnesium (Mg) alloys are required for components working at temperatures above 200 °C. These new alloys are necessary for high-volume applications such as critical parts used for internal combustion (IC) engines in power tools. Here we present new developments of a Mg–RE die-cast alloy that shows excellent ambient and high temperature tensile strength, creep resistance, stiffness and thermal conductivity, which are key advantages for alloys used at elevated temperatures. The excellent creep resistance of the die-cast Mg3.5RE(La,Ce,Nd)1.5GdMnAl alloy, in comparison with its counterpart alloy without the Al addition, shows a significant improvement of the steady-state creep rate (SCR) at 300°C/50MPa. The synergistic effect of Al, Gd and Mn has been found to induce a novel and thermally stable AlMnGd ternary short-range order (SRO, 0–2nm)/cluster (2–10nm) in the Mg matrix, which is believed to be responsible for the improvement in creep performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Mechanical Properties, Phase Transformations |