The Influence of Home Scrap on Mechanical Properties of MgAl9Zn1 Alloy Castings

Archives of Foundry Engineering. 2017;17(2):39-42 DOI 10.1515/afe-2017-0048

 

Journal Homepage

Journal Title: Archives of Foundry Engineering

ISSN: 1897-3310 (Print); 2299-2944 (Online)

Publisher: Sciendo

Society/Institution: Polish Academy of Sciences

LCC Subject Category: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials

Country of publisher: Poland

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS

Konopka Z. (Department of Foundry, Czestochowa University of technology Al. Armii Krajowej 19, 42-200 Częstochowa, Poland)
Chojnacki A. C. (Department of Foundry, Czestochowa University of technology Al. Armii Krajowej 19, 42-200 Częstochowa, Poland)
Lagiewka M. (Department of Foundry, Czestochowa University of technology Al. Armii Krajowej 19, 42-200 Częstochowa, Poland)
Zyska A. (Department of Foundry, Czestochowa University of technology Al. Armii Krajowej 19, 42-200 Częstochowa, Poland)

EDITORIAL INFORMATION

Double blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 12 weeks

 

Abstract | Full Text

The work presents the results of examinations concerning the influence of various amounts of home scrap additions on the properties of castings made of MgAl9Zn1 alloy. The fraction of home scrap in the metal charge ranged from 0 to 100%. Castings were pressure cast by means of the hot-chamber pressure die casting machine under the industrial conditions in one of the domestic foundries. The examinations consisted in the determination of the following properties: tensile strength Rm, yield strength Rp0.2, and the unit elongation A5, all being measured during the static tensile test. Also, the hardness measurements were taken by the Brinell method. It was found that the mechanical properties (mainly the strength properties) are being improved up to the home scrap fraction of 50%. Their values were increased by about 30% over this range. Further rise in the home scrap content, however, brought a definite decrease in these properties. The unit elongation A5 exhibited continual decrease with an increase in the home scrap fraction in the metal charge. A large growth of hardness was noticed for the home scrap fraction increasing up to the value of 50%. Further increasing the home scrap percentage, however, did not result in a significant rise of the hardness value any more.