Advanced neutron diffraction techniques for strain measurements in polycrystalline materials

P. MIKULA; P. LUKÁS; M. VRÁNA; P. KLIMANEK; T. KSCHIDOCK; K. MACEK; J. JANOVEC; J.C. OSBORN; G.M. SWALLOWE

doi:doi:10.1051/jp4:19937348

Numéro		J. Phys. IV France Volume 03, Numéro C7, Novembre 1993 The 3rd European Conference on Advanced Materials and Processes Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés


Page(s)		C7-2183 - C7-2188
DOI		https://doi.org/10.1051/jp4:19937348

The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-2183-C7-2188
DOI: 10.1051/jp4:19937348

Advanced neutron diffraction techniques for strain measurements in polycrystalline materials

P. MIKULA¹, P. LUKÁS¹, M. VRÁNA¹, P. KLIMANEK², T. KSCHIDOCK², K. MACEK³, J. JANOVEC³, J.C. OSBORN⁴ and G.M. SWALLOWE⁴

¹ Nuclear Physics Institute, 25068 Rez, Czech Republic
² Bergakademie Freiberg, 9200 Freiberg, Germany
³ Faculty of Mechanical Engineering, CTU, Prague, Czech Republic
⁴ Physics Dept., Loughborough University of Technology, England

Abstract
Three unique high resolution experimental arrangements for nondestructive strain measurements which are based on neutron Bragg diffraction optics with cylindrically bent perfect crystals are reviewed. Using focusing in momentum and real space these techniques yield Δd/d (d-lattice spacing) resolution of 10^-4 - 10^-3 and considerably higher luminosity in comparison with the current dedicated instruments. They permit measurements not only macrostrain components resulting in angular shifts of diffraction peaks but also of microstrains by means of profile-broadening analysis.