Zn–Al–Cu Alloys: Exploring the Correlations between Microstructure, Copper Content, and Wear
Source abstract
Abstract
Zn–Al‐based alloys are widely used as tribological materials in bearing applications. Understanding the combined effects of third‐element additions and cooling rates during solidification is essential for improving their wear resistance. This study investigates the influence of Cu additions (0.8 and 1.3 wt%) and cooling rates on the microstructure and wear behavior of a Zn‐8wt.%Al alloy, produced using a nonsteady‐state directional solidification technique. Increasing Cu content reduced the secondary dendritic spacing (λ2) and eutectic fibrous spacing (λF) at the same solidification velocity or cooling rate. Worn volume (VW) is correlated with λ2, but only in the alloy with higher Cu content does VW show a dependence on λ2. Despite its higher hardness, the alloy with 1.3 wt% Cu exhibited lower wear resistance due to a more intense release of Cu‐rich phases acting as abrasive particles.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Aluminum Alloys Composites Properties · Aluminum Alloy Microstructure Properties · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Engineering Federal University of Rio Grande do Norte, UFRN Natal Rio Grande do Norte 59078‐970 Brazil
Federal Institute of Education, Science and Technology of Pará, IFPA Belém Pará 66093‐020 Brazil
Institute of Geosciences and Engineering Federal University of the South and Southeast of Pará, UNIFESSPA Marabá Pará 68050‐080 Brazil
Department of Materials Engineering Federal University of São Carlos UFSCar São Carlos São Paulo 13565‐905 Brazil
Department of Manufacturing and Materials Engineering University of Campinas‐ UNICAMP Campinas São Paulo 13083‐860 Brazil
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