| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defects and Properties of Cast Metals
|
| Presentation Title |
Assessment of Grain Refinement on Hot-tearing of New Multicomponent Al-Cu Alloys |
| Author(s) |
Adrian S. Sabau, Seyed Mirmiran, Christopher Glaspie, Shimin Li, Diran Apelian, Amit Shyam, Andres F. Rodriguez, J. Allen Haynes |
| On-Site Speaker (Planned) |
Adrian S. Sabau |
| Abstract Scope |
Hot-tearing is a major casting defect that is difficult to overcome, especially for multicomponent Al alloys used for cylinder head castings as Al-Cu alloys are well known to be prone to hot-tearing in permanent mold casting. In this study, hot-tearing indices were evaluated for a new multicomponent Al-Cu alloy family using two different permanent molds in order to ensure an adequate and accurate characterization of the hot-tear resistance. The relationship between the two hot-tearing indices, which are estimated by visually examining the cracking severity, and the load at solidus was investigated. The Cu composition was varied from approximately 5 to 8 wt.%. Based on the hot-tearing evaluation, it was found that higher Cu levels acted as an effective grain refiner for the non-grain refined alloys and that additional grain refining via Al-5Ti-1B master alloy significantly reduces the hot-tearing susceptibility at Cu contents greater than 7.3 wt.%. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |