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This research aims to enhance the specific strength of an Al-Mn-Cu-Zr alloy through mechanical alloying and hot pressing.

Microstructure and Mechanical Properties of Mechanically Alloyed Al-Mn-Cu-Zr Alloy

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Randomized trial analyzes mechanical properties and microstructural changes in an aluminum alloy, suggesting improvements for aerospace applications.

This research aims to enhance the specific strength of an Al-Mn-Cu-Zr alloy through mechanical alloying and hot pressing.
The alloy was produced with mechanical alloying and subsequently hot pressed at 350 to 450°C.
High-energy ball milling for 10 hours created nanostructured granules with a grain size of 20-30 nm.
Microstructural analyses assessed changes in grain size, phases, and porosity.
Average grain size increased to ~90 nm post-annealing with precipitated phases of Al3Zr, Al6Mn, and Al20Cu2Mn3.
Microhardness decreased to ~300-340 HV after annealing, with hot-pressed specimens averaging 280 HV due to porosity.
The lowest porosity (0.5%) and highest compressive yield stress of ~700 MPa were observed at 450°C.

Yakovtseva et al. (2026) studied this question.

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Randomized trial analyzes mechanical properties and microstructural changes in an aluminum alloy, suggesting improvements for aerospace applications.