Produção Nacional
Revisado por pares
Microstructure and Mechanical Properties of AA7075 Aluminum Alloy Fabricated by Spark Plasma Sintering (SPS)
2021; Multidisciplinary Digital Publishing Institute; Volume: 14; Issue: 2 Linguagem: Inglês
10.3390/ma14020430
ISSN1996-1944
AutoresElder Soares, Nadège Bouchonneau, Elizeth Oliveira Alves, Kleber Gonçalves Bezerra Alves, Oscar Araújo Filho, David Mesguich, Geoffroy Chevallier, Christophe Laurent, Claude Estournès,
Tópico(s)Advanced ceramic materials synthesis
ResumoAA7075 aluminum alloy is widely used for several high-technology applications for its high mechanical strength to weight ratio but is still the subject of several studies seeking a further increase in its mechanical properties. A commercial powder is used, either as-received or after ball-milling. Dense AA7075 samples are prepared in one step by Spark Plasma Sintering, at 550 °C with a holding time of 15 min and a uniaxial pressure of 100 MPa. No additional heat treatment is performed. Laser granulometry, X-ray diffraction and optical- and scanning electron microscopy show that both grain size and morphology are preserved in the dense samples, due to the relatively low temperature and short sintering time used. The samples prepared using the ball-milled powder exhibit both higher Vickers microhardness and transverse fracture strength values than those prepared using the raw powder, reflecting the finer microstructure.
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