TY - JOUR

T1 - Development of a magnesium secondary alloy system for mixed magnesium post-consumer scrap

AU - Fechner, Daniel

AU - Blawert, Carsten

AU - Hort, Norbert

AU - Dieringa, Hajo

AU - Kainer, Karl Ulrich

PY - 2013/8/1

Y1 - 2013/8/1

N2 - Six alloys were prepared by high pressure die casting in order to develop a magnesium secondary alloy system for mixed post-consumer scrap. The alloys were investigated with regard to intermetallic phases, grain structures, mechanical properties and performance in the salt spray test. The results are discussed in relation to the characteristics of the high pressure die casting process. The effect of contamination by copper and compensation for this effect by the addition of zinc were thoroughly investigated for the most promising alloy. It is evident that the alloying elements strontium, silicon and calcium are incorporated in the ternary Zintl phase Sr6.33Mg16.67Si13, while aluminium, zinc, copper and magnesium form the tau-phases Mg32(Alx,Cu1−x)49 and Mg32(Al,Zn)49. The two tau-phases can merge due to isomorphism. Mg32(Al,Zn)49 ensures improved corrosion resistance after the addition of copper.

AB - Six alloys were prepared by high pressure die casting in order to develop a magnesium secondary alloy system for mixed post-consumer scrap. The alloys were investigated with regard to intermetallic phases, grain structures, mechanical properties and performance in the salt spray test. The results are discussed in relation to the characteristics of the high pressure die casting process. The effect of contamination by copper and compensation for this effect by the addition of zinc were thoroughly investigated for the most promising alloy. It is evident that the alloying elements strontium, silicon and calcium are incorporated in the ternary Zintl phase Sr6.33Mg16.67Si13, while aluminium, zinc, copper and magnesium form the tau-phases Mg32(Alx,Cu1−x)49 and Mg32(Al,Zn)49. The two tau-phases can merge due to isomorphism. Mg32(Al,Zn)49 ensures improved corrosion resistance after the addition of copper.

KW - Corrosion

KW - HPDC

KW - Intermetallics

KW - Magnesium alloys

KW - Mechanical characterization

KW - Secondary alloy

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=84877048676&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2013.03.053

DO - 10.1016/j.msea.2013.03.053

M3 - Journal articles

AN - SCOPUS:84877048676

VL - 576

SP - 222

EP - 230

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

SN - 0921-5093

ER -