Hot-tearing of multicomponent Al-Cu alloys based on casting load measurements in a constrained permanent mold

Conference · Sun Jan 01 04:00:00 UTC 2017

DOI:https://doi.org/10.1007/978-3-319-51493-2_44· OSTI ID:1348325

Sabau, Adrian S ^[1]; Mirmiran, Seyed ^[2]; Glaspie, Christopher ^[2]; Li, Shimin ^[3]; Apelian, Diran ^[3]; Shyam, Amit ^[1]; Haynes, James A ^[1]; Rodriguez, Andres ^[4]

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1. ORNL
2. Fiat Chrysler Automobiles North America
3. Worcester Polytechnic Institute (WPI), MA
4. Nemak, Garza Garcia, N.L., Mexico

Hot-tearing is a major casting defect that is often difficult to characterize, especially for multicomponent Al alloys used for cylinder head castings. The susceptibility of multicomponent Al-Cu alloys to hot-tearing during permanent mold casting was investigated using a constrained permanent mold in which the load and displacement was measured. The experimental results for hot tearing susceptibility are compared with those obtained from a hot-tearing criterion based temperature range evaluated at fraction solids of 0.87 and 0.94. The Cu composition was varied from approximately 5 to 8 pct. (weight). Casting experiments were conducted without grain refining. The measured load during casting can be used to indicate the severity of hot tearing. However, when small hot-tears are present, the load variation cannot be used to detect and assess hot-tearing susceptibility.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: ORNL work for others
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1348325
• Country of Publication: United States
• Language: English