Hetero-duplex structure containing both structural and spatial heterogeneities has been developed in a series of Mg-Al/Cu-Zn alloys. Among these alloys, a hetero-duplex Mg72Cu5Zn23 alloy with uniform dispersion of spherical duplex colonies exhibits high yield strength of 455MPa with a plasticity of ∼5%. On the contrary, a hetero-duplex Mg70Al3Zn22 alloy consisting of typical polygonal duplex colonies undergoes catastrophic failure without macroscopic plasticity. Based on these results, it is possible to consider that the morphology of the hetero-duplex colony plays an important role to control the macroscopic plasticity of the hetero-duplex alloys.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering