PT  - JOURNAL ARTICLE
AU  - Tillová, Eva
AU  - Chalupová, Mária
AU  - Závodská, Denisa
AU  - Kuchariková, Lenka
AU  - Belan, Juraj
AU  - Vaško, Alan
TI  - Effect of Al5FeSi Phases in Secondary AlZn10Si8Mg Cast Alloys on Mechanical Properties and Fracture Surface
DP  - 2018 Dec 1
TA  - Manufacturing Technology Journal
PG  - 1034--1040
VI  - 18
IP  - 6
AID - 10.21062/ujep/220.2018/a/1213-2489/MT/18/6/1034
IS  - 12132489
AB  - Effect of brittle plate-like Al5FeSi iron phases in secondary (scrap-based - recycled) AlZn10Si8Mg cast alloys with different amount of iron (0.150 wt. % and 0.559 wt. %) on microstructure, mechanical properties (UTS, YTS, ductility and Brinell hardness) and fracture surface were studied. Standard, colour and deep etching were utilized for observation and identification of intermetallic phases (in order to reveal the 3D-morphology of the Si-particles and intermetallic phases). X-ray analysis was used for the evaluation of element composition of the specimen. The results show that SDAS factor decreases with increasing the Fe content; the area proportion and the average length of Al5FeSi phases increased; mechanical properties slightly decreased (YTS from 185 MPa to 176 MPa and UTS from 187 MPa to 178 MPa). The fracture surface consists of transcrystalline ductile fracture, in alloy with 0.150 wt. % Fe the transcrytalline ductile fracture is dominant in the eutectic and on the α-matrix and the transcrystalline cleavage fracture was observed not much; in alloy with 0.559 wt. % Fe the transcrystalline cleavage fracture is dominant.