Operando measurement of lattice strain in internal combustion engine components by neutron diffraction.

Autor:	Wissink ML; Energy Science and Technology Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831; wissinkml@ornl.gov., Chen Y; Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831., Frost MJ; Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831., Curran SJ; Energy Science and Technology Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831., Rios O; Physical Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831.; Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996., Sims ZC; Physical Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831.; The Bredesen Center for Interdisciplinary Research and Graduate Education, The University of Tennessee, Knoxville, TN 37996., Weiss D; Eck Industries, Inc., Manitowoc, WI 54220., Stromme ET; Physical Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831.; US Navy, Washington, DC 20350., An K; Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN 37831.
Jazyk:	angličtina
Zdroj:	Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2020 Dec 29; Vol. 117 (52), pp. 33061-33071. Date of Electronic Publication: 2020 Dec 21.
DOI:	10.1073/pnas.2012960117
Abstrakt:	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. A modified commercial generator engine was mounted in the VULCAN diffractometer at the Spallation Neutron Source, and the lattice strains in both the cylinder block and head were measured under static nonfiring conditions as well as steady state and cyclic transient operation. The dynamic temporal response of the lattice strain change during transient operation was resolved in two locations by asynchronous stroboscopic neutron diffraction. We demonstrated that operando neutron measurements can allow for understanding of how materials behave throughout operational engineering devices. This study opens a pathway for the industrial and academic communities to better understand the complexities of material behavior during the operation of internal combustion engines and other real-scale devices and systems and to leverage techniques developed here for future investigations of numerous new platforms and alloys. Competing Interests: The authors declare no competing interest. (Copyright © 2020 the Author(s). Published by PNAS.)
Databáze:	MEDLINE
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