Analysis of the η phase of the Al-Cu-Zn system and its relationship with τ' and α phases

José David Villegas Cárdenas; Maribel Leticia Saucedo Muñoz; Víctor Manuel López Hirata; Elizabeth Garfias García; Miriam Aguilar Sánchez; Miguel Morales Rodríguez

doi:10.3989/revmetalm.e264.1681

Authors

José David Villegas Cárdenas Universidad Nacional Autónoma de México https://orcid.org/0000-0002-5318-4849
Maribel Leticia Saucedo Muñoz Escuela Superior de Ingeniería Química, IPN https://orcid.org/0000-0001-8610-0579
Víctor Manuel López Hirata Escuela Superior de Ingeniería Química, IPN https://orcid.org/0000-0002-7781-3419
Elizabeth Garfias García Universidad Autónoma Metropolitana https://orcid.org/0000-0001-7001-4967
Miriam Aguilar Sánchez Universidad Autónoma Metropolitana https://orcid.org/0000-0002-8570-647X
Miguel Morales Rodríguez Universidad Autónoma Metropolitana https://orcid.org/0000-0003-1600-4914

DOI:

https://doi.org/10.3989/revmetalm.e264.1681

Keywords:

Aging, Homogenized, Al-Cu-Zn ternary alloys, Phases

Abstract

In this study, a characterization analysis of a series of Al-Cu-Zn alloys was carried out, focusing on the relationship between the η phase and the surrounding phases. As part of this analysis, the nanohardness of the η phase was measured, along with its average perimeter and the contact perimeter shared with the τ' and α phases—an aspect that has not been previously examined in this type of alloy. In order to accomplish this, the alloys were analyzed using a scanning electron microscope in backscattered electron mode to identify and distinguish each phase. The results demonstrate that a multiple linear regression model, using hardness as the dependent variable and the aforementioned morphological parameters as independent variables, yields a near-zero error. This finding indicates a strong correlation between these variables and both the hardness and the chemical composition of the alloy. The use of phase perimeter as a predictive parameter has not been previously applied to Al-Cu-Zn alloys. Therefore, this study provides a novel methodological contribution, offering a framework that may support the advancement of image analysis techniques in the characterization of multiphase metallic systems.

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