Contribution of Mg2Si precipitates to the strength of direct metal laser sintered AlSi10Mg

By A. Hadadzadeh, B. S. Amirkhiz, M. Mohammadi. Materials Science & Engineering: A, 2019

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Abstract Microstructure of deformed DMLS-AlSi10Mg under quasi-static loading was studied using TEM to elaborate the strengthening mechanisms. In addition to Orowan (due to presence of Si precipitates), Hall-Petch (due to eutectic Si walls), and dislocation hardening (due to pre-existing entangled dislocations) mechanisms, Mg2Si precipitates (colonies) contributed to the strength of alloy by impeding dislocation motion. The level of this contribution was evaluated as ~13 MPa by comparing the modeled and measured yield strength.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/673ad63aff96858a04b2c806053733b6e336c835