Advances in Automobile Engineering
Open Access

Fitness-for-service and residual stress analysis for automotive powertrain components using neutron diffraction

2^nd International Conference and Exhibition on Automobile Engineering

December 01-02, 2016 Valencia, Spain

Dimitry Sediako, Frank Czerwinski, Wojciech Kasprzak, Ravi Ravindran and Anthony Lombardi

Canadian Nuclear Laboratories, Canada
CanmetMATERIALS, Canada
Ryerson University, Canada

Posters & Accepted Abstracts: Adv Automob Eng

Abstract :

The industry-wide push to develop advanced, low-displacement, high power density engines frequently demands increased operating temperatures and pressures for the powertrain components, such as engine heads, cylinder blocks, pistons, etc. At the same time, lightweighting has led to increasing use of aluminum alloys in these components. Both trends inevitably result in demand for higher-performing aluminum alloys and in the need to develop and test new alloying systems. An in-situ study of the creep behavior using neutron diffraction quickly reveals the response of individual crystallographic planes to the applied load under the operating-engine temperatures. This knowledge helps to identify the alloy chemistry and processing conditions that result in manufacturing engine components capable of sustaining the thermal mechanical loads over the expected life cycle of a vehicle, which typically exceeds 3000 hours. Residual stress in the as-cast engine components and efficient stress mitigation are further ongoing concerns for many OEMs. A series of neutron studies has been performed at the Canadian Nuclear Laboratories to evaluate how heat treatment techniques affect stress profiles along the cylinder web areas in engine blocks and between valve seats in aluminum engine heads. These studies have revealed the most critical information about the residual stress for development of manufacturing technologies that prevent distortion or cracking in the powertrain components.

Biography :

Email: dimitry.sediako@cnl.ca