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February 16, 2021 For a researcher who started out in mechanical engineering with a focus on engine combustion, Martin Wissink has learned a lot about neutrons on the job. Wissink came to Oak Ridge National Laboratory as a postdoc with a keen interest in the lab’s big science tools, including its unrivaled neutron diagnostic capabilities. Much of his work the last few years has been to deploy those tools in the search for better materials and designs for ultra-efficient advanced combustion engines with low emission profiles. These engines, most likely running on alternative fuels, are expected to serve as a bridge to a fully decarbonized transportation sector. ....
ORNL team performs first neutron diffraction experiments on a running engine Researchers at Oak Ridge National Laboratory (ORNL) have used neutron diffraction to provide noninvasive measurement of lattice strains inside components of a firing engine, thereby enabling the operando study of complex load states and thermal gradients throughout the solid materials. Their results are published in an open-access paper in Proceedings of the National Academy of Sciences (PNAS). Engineering neutron diffraction can nondestructively and noninvasively probe stress, strain, temperature, and phase evolutions deep within bulk materials. In this work, we demonstrate operando lattice strain measurement of internal combustion engine components by neutron diffraction. ....
E-Mail IMAGE: Oak Ridge National Laboratory is designing a neutronic research engine to evaluate new materials and designs for advanced vehicles using the facilities at the Spallation Neutron Source at ORNL. view more Credit: Jill Hemman/ORNL, U.S. Dept of Energy, and the Southwest Research Institute. EMBARGOED UNTIL MONDAY, DECEMBER 21, 2020, 3 PM US EASTERN. In the quest for advanced vehicles with higher energy efficiency and ultra-low emissions, Oak Ridge National Laboratory researchers are accelerating a research engine that gives scientists and engineers an unprecedented view inside the atomic-level workings of combustion engines in real time. The new capability is an engine built specifically to run inside a neutron beam line. This neutronic engine provides a unique sample environment that allows investigation of structural changes in new alloys designed for the environment of a high-temperature, advanced combustion engine operating in r ....