journal article·2022-02-10Open access

Improve the Mechanical Properties of Mg–3Al–1Zn Alloy via Simultaneous Annealing and Loading

Jiejun He, Lushu Wu

Metals· Volume 12· Issue 2

Abstract

A strengthening phenomenon has been demonstrated in the Mg–3Al–1Zn (AZ31) alloy after simultaneous annealing and loading at 180 °C. The microstructural analysis reveals that a few second-phase particles appear in the material after direct annealing at 180 °C for 20 h. However, a higher quantity of the second-phase particles (Al12Mg17) is observed in the alloy after simultaneous annealing and loading. Further, a high stress is observed to be more beneficial for the precipitation of the particles. It is speculated that the stress applied during annealing can provide a better condition for the nucleation of the precipitates. The enhanced extent of precipitates may play a significant role in preventing the dislocation gliding, thus, leading to a strengthening effect. The observed phenomenon may also provide a novel strategy for strengthening the magnesium alloys.
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Research context

OpenAlex topics: Magnesium Alloys: Properties and Applications · Aluminum Alloys Composites Properties · Aluminum Alloy Microstructure Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang 550003, China

School of Mechanical Engineering, Guizhou Institute of Technology, Guiyang 550003, China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Guizhou Province

References (20)

Show source-provided references
1. Dislocation-particle interactions in magnesium alloys10.1016/j.actamat.2020.04.055 ↗
2. How magnesium accommodates local deformation incompatibility: A high-resolution digital image correlation study10.1016/j.actamat.2017.05.040 ↗
3. Grain size effect on twinning and annealing behaviors of rolled magnesium alloy with bimodal structure10.1016/j.msea.2019.03.041 ↗
4. Accelerated degradation rate of high-strength Mg-4Y-1Zn by Cu addition for degradable bridge-plug applications10.3139/146.111945 ↗
5. An ultra-high strength Mg-3Al-Zn alloy with low tebsion-compression yield asymmetry10.1016/j.matlet.2020.127489 ↗
6. High strength and ductility Mg-8Gd-3Y-0.5Zr alloy with bimodal structure and nano-precipitates10.1016/j.jmst.2019.10.024 ↗
7. Achieving exceptionally high strength in binary Mg-13Gd alloy by strong texture and Achieving exceptionally high strength in binary Mg-13Gd alloy by strong texture and substantial precipitates10.1016/j.scriptamat.2020.10.052 ↗
8. The effect of severe plastic deformation on the Mg properties after CEC deformation10.1016/j.jma.2020.04.005 ↗
9. A novel severe plastic deformation method and its effect on microstructure, texture and mechanical properties of Mg-Gd-Y-Zn-Zr alloy10.1016/j.jallcom.2020.153698 ↗
10. Evolution of the microstructure, texture and thermal conductivity of as-extruded ZM60 magnesium alloy in pre-compression10.1016/j.jallcom.2018.10.203 ↗
11. Strengthening and toughening of extruded magnesium alloy rods by combining pre-torsion deformation with subsequent annealing10.1016/j.msea.2015.10.069 ↗
12. Strengthening and toughening of magnesium alloy by {10–12} extension twins10.1016/j.scriptamat.2011.09.033 ↗
13. Periodic segregation of solute atoms in fully coherent twin boundaries10.1126/science.1229369 ↗
14. A new annealing hardening mechanism in pre-twinned Mg-3Al-1Zn alloy10.1016/j.msea.2015.12.046 ↗
15. The yield asymmetry and precipitation behavior of pre-twinned ZK60 alloy10.1016/j.msea.2015.11.092 ↗
16. High pressure aging synthesis of a hexagonal Mg2Sn strengthening precipitate in Mg-Sn alloys10.1016/j.matlet.2015.05.087 ↗
17. Precipitation behavior and its effects on mechanical properties in a pre-twinned Mg-6Al-1Zn alloy10.2320/matertrans.M2017406 ↗
18. Hardening by annealing and softening by deformation in nanostructured metals10.1126/science.1124268 ↗
19. Improving the mechanical properties of pure magnesium through cold hydrostatic extrusion and low-temperature annealing10.1016/j.msea.2014.12.104 ↗
20. Annealing strengthening in a dilute Mg-Zn-Ca sheet alloy10.1016/j.scriptamat.2015.06.002 ↗