English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The effect of milling time on the crystallite size, microstrain and Vickers microhardness, of an alumi num alloy A356 (Al-7wt % Si) with and without SiC reinf orcement (15 wt%) was studied. The metal alloy powders were obtained by the rotating electrode pro cess (REP) [1] from cylinders of the alloy, the obt ained powders present spherical morphology with an averag size of 150 μm and an average microhardness of 94 HV0, 1. The alloy with and without reinforcement was subj ected to mechanical milling in a high energy mill SPEX 8000D with effective milling times of 3, 6, 9 and 12 hours. The microstructural evolution of the obtained samples was evaluated by X-ray diffraction , Vickers microhardness and optical microscopy. It is noted that the values of microhardness of the alloy with and without reinforcement milling for 3 hours are very simila; for higher milling times, samples rein forced with SiC reach higher values than the sample s without reinforcement. This increase in the microha rdness is achieved thanks to the uniform distributi on of reinforcement particles, the strain hardening of th e metal matrix and microstructural refinement produ ced by mechanical milling [2]. It is appreciated that t he composite reaches a crystallite size somewhat sm ller than the alloy, although both show similar behavior . The crystallite size presents a rapid decrease in the early hours of milling and then remains almost cons ta t.

Evolución microestructural de una aleación de aluminio A356 con y sin reforzamiento. de SiC sometida a molienda mecánica