Publications by authors named "Amit Shyam"
Article Synopsis
- The study examines the creep properties of two aluminum alloys, ACMZ and its commercial variant RR350, at 300°C under different stress conditions.
- At low stresses (up to 30 MPa), both alloys show similar resistance to creep, but RR350 deforms more slowly due to its higher amount of intergranular precipitates.
- At higher stresses (30-80 MPa), RR350 outperforms ACMZ, thanks to mechanisms like fewer softer zones, better load transfer, and less cavitation at grain boundaries, highlighting the critical role of grain boundary precipitates in improving the alloys' creep resistance.
Petascale supercomputing to accelerate the design of high-temperature alloys.
Sci Technol Adv Mater
October 2017
Recent progress in high-performance computing and data informatics has opened up numerous opportunities to aid the design of advanced materials. Herein, we demonstrate a computational workflow that includes rapid population of high-fidelity materials datasets via petascale computing and subsequent analyses with modern data science techniques. We use a first-principles approach based on density functional theory to derive the segregation energies of 34 microalloying elements at the coherent and semi-coherent interfaces between the aluminium matrix and the '-AlCu precipitate, which requires several hundred supercell calculations.
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