Enhanced thermal stability of nanocrystalline Cu-Al alloy by nanotwin and nanoprecipitate

Sikdar, K and Roy, B and Mahata, A and Roy, D (2022) Enhanced thermal stability of nanocrystalline Cu-Al alloy by nanotwin and nanoprecipitate. In: Journal of Alloys and Compounds, 922 .

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Abstract

The structural stability of nano-grained Cu-Al alloy synthesized by ball milling under liquid nitrogen temperature was analyzed. The hardness of the alloy drops only 6 after annealing at 1173 K for 30 min, in comparison to the as-milled condition. X-ray diffraction (XRD), transmission electron microscopy (TEM), and Molecular dynamics (MD) simulation was incorporated to get an insight into the enhanced thermal stabilization of the alloy. Cryogenic ball milling introduces extensive deformation twins in the microstructure and a significant amount of twins are present after annealing. The retained nanoscale twins along with the annealing induced Al2Cu nano-precipitate synergistically contribute toward the structural stability of the alloy.

Item Type:	Journal Article
Publication:	Journal of Alloys and Compounds
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Elsevier Ltd.
Keywords:	Aluminum alloys; Annealing; Ball milling; Binary alloys; Copper alloys; Grain growth; High resolution transmission electron microscopy; Liquefied gases; Milling (machining); Molecular dynamics; Nanocrystalline alloys; Nanocrystals; Precipitation (chemical); Thermodynamic stability, Condition; Liquid nitrogen temperature; Nanocrystallines; Nanograined materials; Nanoprecipitate; Nanotwins; Structural stabilities; Synthesised; X- ray diffractions; Zenne pinning, X ray diffraction
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	10 Aug 2022 05:28
Last Modified:	10 Aug 2022 05:28
URI:	https://eprints.iisc.ac.in/id/eprint/75762

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