Enhanced Strength and Ductility of AZ80 Magnesium Alloys by Spray Forming and ECAP Techniques


Fast spray forming technology followed by equal channel angular pressing (ECAP) was employed to obtain a specific microstructure: separated coarse magnesium grains surrounded by deformation networks. The deformation layer consisted of ultrafine grained magnesium with an average grain size of 0.6 μm and ellipsoidal shaped β-Mg17Al12 particles with a size of 200-300 nm and a volume fraction of 13%. Mechanical tensile test demonstrates the advantage of the specific structure: a yield strength of 235MPa combined with an elongation to failure of 14%.

[1] H. Kitahara, F. Maruno, M. Tsushida, and S. Ando, Deformation behavior of Mg single crystals during a single ECAP pass at room temperature, Materials Science and Engineering A, 590, 274–280, (2014).

[2] G. S. E. Antipas, C. Lekakou, and P. Tsakiropoulos, Microstructural characterisation of Al - Hf and Al - Li - Hf spray deposits, Materials Characterization, 62, no. 4, 402–408, (2011).

[3] R. Z. Valiev, R. K. Islamgaliev, and I. V. Alexandrov, Bulk nanostructured materials from severe plastic deformation, Progress in Materials Science, 45, no. 2, 103–189, (2000).

[4] D. C. Foley, M. Al-Maharbi, K. T. Hartwig, I. Karaman, L. J. Kecskes, and S. N. Mathaudhu, Grain refinement vs. crystallographic texture: Mechanical anisotropy in a magnesium alloy, Scripta Materialia, 64, no. 2, 193–196, (2011).