| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys, Processing and Characterization
|
| Presentation Title |
Stress Characterization of Bore-chilled Sand Cast Aluminum Engine Blocks in As-cast and T7 Condition with Application of Neutron Diffraction |
| Author(s) |
Dimitry Sediako, Joshua Stroh, Glenn Byczynski, Anthony Lombardi, Anna Paradowska |
| On-Site Speaker (Planned) |
Dimitry Sediako |
| Abstract Scope |
In an effort to improve vehicle fuel efficiency, aluminum (Al) alloys have been gaining upward momentum for use in automotive powertrain components such as engine blocks. Al alloys are lightweight and have good mechanical strength at engine operating temperatures; making them an suitable choice for engine block production. However, during the manufacturing process factors such as inhomogeneous cooling rates and/or coefficients of thermal expansion in multi-material castings can lead to the development of residual stress. This is of particular concern for the relatively thin cylinder bridges, which are exposed to large thermo-mechanical loading during engine operation. The casting process used at Nemak for I6 engine block production does not utilise cast-in liners and therefore may be also be suitable for future mass-produced linerless blocks. This paper utilizes neutron diffraction and SEM/EDS to determine how T7 heat treatment reduces the magnitude of residual stress in cast Al I6 engine blocks. |
| Proceedings Inclusion? |
Planned: Light Metals |