RT Journal Article
SR Electronic
A1 Tillová, Eva
A1 Chalupová, Mária
A1 Závodská, Denisa
A1 Kuchariková, Lenka
A1 Belan, Juraj
A1 Vaško, Alan
T1 Effect of Al5FeSi Phases in Secondary AlZn10Si8Mg Cast Alloys on Mechanical Properties and Fracture Surface
JF Manufacturing Technology Journal
YR 2018
VO 18
IS 6
SP 1034
OP 1040
DO 10.21062/ujep/220.2018/a/1213-2489/MT/18/6/1034
UL https://journalmt.com/artkey/mft-201806-0027.php
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.