Effect of heat treatments on mechanical properties and fracture behavior of a thixocast A356 aluminum alloy

Cavaliere, Pasquale; Cerri, E.; Leo, Paola

doi:10.1023/b:jmsc.0000016165.99666.dd

Cited by 43 publications

(37 citation statements)

References 2 publications

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“…With a relatively high eutectic content, Al-7Si-Mg alloys possess excellent castability, good mechanical properties and corrosion resistance and have thus been the material of choice for a variety of automotive components [1][2][3]. These components are produced both with conventional casting methods and via the innovative rheocasting route [4].…”

Section: Introductionmentioning

confidence: 99%

Response to artificial ageing of dendritic and globular Al–7Si–Mg alloys

Birol

2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Response to artificial ageing of dendritic and globular Al–7Si–Mg alloys

Birol

2009

Journal of Alloys and Compounds

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“…Segregation and distribution of the alloying elements has a great influence on the microstructural evolution during semi-solid treatment. Moreover, this affects the mechanical properties of the subsequent thixoformed parts [32][33][34]. Figure 6 shows the SEM images of the compressed samples heat treated at 600˝C (Figure 6a Figure 7.…”

Section: Phase Evolution and Alloying Element Distribution During Parmentioning

confidence: 99%

Phase Evolution and Mechanical Behavior of the Semi-Solid SIMA Processed 7075 Aluminum Alloy

Binesh

Aghaie-Khafri

2016

Metals

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Microstructural and mechanical behaviors of semi-solid 7075 aluminum alloy were investigated during semi-solid processing. The strain induced melt activation (SIMA) process consisted of applying uniaxial compression strain at ambient temperature and subsequent semi-solid treatment at 600-620˝C for 5-35 min. Microstructures were characterized by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). During the isothermal heating, intermetallic precipitates were gradually dissolved through the phase transformations of α-Al + η (MgZn 2 ) Ñ liquid phase (L) and then α-Al + Al 2 CuMg (S) + Mg 2 Si Ñ liquid phase (L). However, Fe-rich precipitates appeared mainly as square particles at the grain boundaries at low heating temperatures. Cu and Si were enriched at the grain boundaries during the isothermal treatment while a significant depletion of Mg was also observed at the grain boundaries. The mechanical behavior of different SIMA processed samples in the semi-solid state were investigated by means of hot compression tests. The results indicated that the SIMA processed sample with near equiaxed microstructure exhibits the highest flow resistance during thixoforming which significantly decreases in the case of samples with globular microstructures. This was justified based on the governing deformation mechanisms for different thixoformed microstructures.

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“…Moreover, this affects the mechanical properties of the subsequent thixoformed parts (Annavarapu et al, 1995;Liu et al, 2004;Cavaliere et al, 2004). …”

Section: Sima Processmentioning

confidence: 99%