Journal Published Online: 19 June 2018
Volume 7, Issue 4

In Situ Investigations of Elastic Strain State in Deep Rolled 4140H Steel by Neutron Diffraction Method

CODEN: MPCACD

Abstract

A deep rolling process was applied on 4140H steel specimens with a self-built loading frame and investigated in situ with neutron radiation using the SALSA instrument at the Institut Laue-Langevin (ILL). A neutron diffraction stress imaging approach was developed and used to determine material changes from the surface up to several millimeters inside the material by single expositions. The strains could be evaluated as deviations of the diffraction signal along the height of an area detector, and the theoretical maximum depth resolution was given by geometrical magnification together with the detector pixel size. The results of these experiments together with complementary post-process investigations could be used to link the internal load during the process with resulting material modifications such as the generated residual strains.

Author Information

Meyer, Heiner
Department of Materials Science, Leibniz-Institut für Werkstofforientierte Technologien, Bremen, Germany
Epp, Jérémy
Department of Materials Science, Leibniz-Institut für Werkstofforientierte Technologien, Bremen, Germany MAPEX Center for Materials and Processes, University of Bremen, Bremen, Germany
Pirling, Thilo
Institut Laue-Langevin, Grenoble Cedex 9, France
Zoch, Hans-Werner
Department of Materials Science, Leibniz-Institut für Werkstofforientierte Technologien, Bremen, Germany MAPEX Center for Materials and Processes, University of Bremen, Bremen, Germany
Pages: 12
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: MPC20170132
ISSN: 2379-1365
DOI: 10.1520/MPC20170132