Change in Porosity of A356 by Holding Time and Its Effect on Mechanical Properties

Journal Article · Mon Oct 15 04:00:00 EDT 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3534-0· OSTI ID:22863276

Uludağ, Muhammet ^[1]; Çetin, Remzi ^[2]; Gemi, Lokman ^[3]; Dispinar, Derya ^[4]

---

1. Bursa Technical University, Metallurgical and Materials Engineering Department (Turkey)
2. KTO Karatay University, Materials Engineering Department (Turkey)
3. Necmettin Erbakan University, Meram Vocational School (Turkey)
4. Istanbul University-Cerrahpasa, Metallurgical and Materials Engineering Department (Turkey)

In most of the practical casting operations, it is important to be able to cast large number of part with one single melt. Therefore, when quantity of the charge and melting crucible is increased, during casting process, the liquid is led to settle for a long period of time. In this work, 10 kg charge of A356 was melted at 750 °C and held for 240 min. A sand mold with different thickness was cast at 30, 60, 120, and 240 min of holding time of the liquid, before and after degassing conditions. Melt quality was measured by reduced pressure test, and pore size and number were measured at each cast part. A correlation between bifilm index and tensile properties was established. It was found that melt quality was decreased with increased holding time and pore formation was enhanced linearly. Additionally, mechanical properties of the alloy were decreased with decreased melt quality and increased pore formation due to holding time of the liquid.

• OSTI ID: 22863276
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 10 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CORRELATIONS
CRUCIBLES
DEGASSING
MELTING
POROSITY
TENSILE PROPERTIES
THICKNESS