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Effect of Ag additions on the microstructure and phase transformations of Zn-22Al-2Cu (wt.%) alloy

  • Carlos Ferreira-Palma EMAIL logo , Héctor J. Dorantes-Rosales , Víctor M. López-Hirata and Alberto A. Torres-Castillo
Published/Copyright: February 19, 2021
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 112 Issue 2

Abstract

The relationship between microstructure and mechanical properties is studied for eutectoid Zn-22Al (wt.%) alloys modified with Cu and Ag. Three alloys with a Cu content of 2 wt.% and varying amounts of Ag were cast and hot-extruded. Different microstructural characteristics were induced by heat treatments: natural aging, artificial aging and furnace cooling. Structural and microstructural characterizations were carried out with X-ray diffraction and scanning electron microscopy. Mechanical properties were determined by tensile testing. Dilatometry was used for determining the effects of composition on the transformation points. The addition of Ag increased the ε phase fraction and provided solid solution strengthening, improving the mechanical strength and reducing ductility. Ag additions also displaced the eutectoid reaction to higher temperatures. The microstructure of the matrix has proven to have a strong impact on mechanical properties. The naturally aged specimens presented the highest ductility and tensile strength; however, these properties are severely affected by aging. Lamellar microstructures present the lowest ductility and values of tensile strength between those of the natural and artificially-aged specimens.

Keywords: Zn–Al; Eutectoid; Dilatometry; X-ray diffraction
Dr. Carlos Ferreira-Palma Centro de Investigación en Micro y Nanotecnología Universidad Veracruzana Av. Adolfo Ruiz Cortines 455 Boca del Río 94294 Mexico Tel.: +52 2297752000 Ext. 25201

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Received: 2020-07-31
Accepted: 2020-10-21
Published Online: 2021-02-19

© 2021 Walter de Gruyter GmbH, Berlin/Boston, Germany

Articles in the same Issue

  1. Contents
  2. Original Contributions
  3. The influence of Cr, Al, Co, Fe and C on negative creep of Waspaloy
  4. Impact of Mo content on the microstructure– toughness relationship in the coarse-grained heat-affected zone of high-strength low-alloy steels
  5. Effect of Ag additions on the microstructure and phase transformations of Zn-22Al-2Cu (wt.%) alloy
  6. Effect of TiB2 addition on the microstructural, electrical, and mechanical behavior of Cu–TiB2 composites processed via spark plasma sintering
  7. Microstructure and mechanical characteristics of Cu-12.5Ni-5Sn-xFe sintered alloys
  8. Glass formation, magnetic properties, and electrical resistivity of the multi-component FeNbBCuNiCo amorphous alloys
  9. Electrochemical study of nickel nucleation mechanisms on glassy carbon at different pH values in an industrial electrolyte
  10. Structural, linear and non-linear optical properties of Cr-doped ZnO thin film for optoelectronics applications
  11. Annealing effect of scratch characteristics of ZnMgO epilayers on R-plane sapphire
  12. Review
  13. Development of high-insulating materials with aerogel for protective clothing applications – an overview
  14. Notifications
  15. Deutsche Gesellschaft für Materialkunde / German Materials Science Society
https://doi.org/10.1515/ijmr-2020-8009
Keywords for this article
Zn–Al; Eutectoid; Dilatometry; X-ray diffraction

Articles in the same Issue

  1. Contents
  2. Original Contributions
  3. The influence of Cr, Al, Co, Fe and C on negative creep of Waspaloy
  4. Impact of Mo content on the microstructure– toughness relationship in the coarse-grained heat-affected zone of high-strength low-alloy steels
  5. Effect of Ag additions on the microstructure and phase transformations of Zn-22Al-2Cu (wt.%) alloy
  6. Effect of TiB2 addition on the microstructural, electrical, and mechanical behavior of Cu–TiB2 composites processed via spark plasma sintering
  7. Microstructure and mechanical characteristics of Cu-12.5Ni-5Sn-xFe sintered alloys
  8. Glass formation, magnetic properties, and electrical resistivity of the multi-component FeNbBCuNiCo amorphous alloys
  9. Electrochemical study of nickel nucleation mechanisms on glassy carbon at different pH values in an industrial electrolyte
  10. Structural, linear and non-linear optical properties of Cr-doped ZnO thin film for optoelectronics applications
  11. Annealing effect of scratch characteristics of ZnMgO epilayers on R-plane sapphire
  12. Review
  13. Development of high-insulating materials with aerogel for protective clothing applications – an overview
  14. Notifications
  15. Deutsche Gesellschaft für Materialkunde / German Materials Science Society
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