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Hardness of FRHC-Cu Determined by Statistical Analysis
Roa Rovira, Joan Josep; Martínez López, Mónica; Rayón Encinas, Emilio; Ferrer Cruselles, Núria; Espiell Álvarez, Ferran; Segarra Rubi, Merce
Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural i Fiabilitat dels Materials
A statistical indentation method has been employed to study the hardness value of fire-refined high conductivity copper, using nanoindentation technique. The Joslin and Oliver approach was used with the aim to separate the hardness (H) influence of copper matrix, from that of inclusions and grain boundaries. This approach relies on a large array of imprints (around 400 indentations), performed at 150 nm of indentation depth. A statistical study using a cumulative distribution function fit and Gaussian simulated distributions, exhibits that H for each phase can be extracted when the indentation depth is much lower than the size of the secondary phases. It is found that the thermal treatment produces a hardness increase, due to the partly re-dissolution of the inclusions (mainly Pb and Sn) in the matrix.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials
Nanotechnology
Materials--Mechanical properties
FRHC copper
cumulative distribution function
nanoindentation
Nanotecnologia
Materials -- Propietats mecàniques
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
Article
         

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