Vorträge (Konferenz)
Wimpory, R.C.; Boin, M.; Rolfs, K.; Chmielus, M.; Fuss, T.; Woracek, R.:
E3: multipurpose instrument for strain, stress, texture
and more. Current State and Future of Neutron Stress Diffractometers Sydney (Lucas Heights), 10.01.2012 - 12.01.2012 (2012)
Abstract:
Since the monochromator upgrade in 2007 [1], the residual stress and texture
diffractometer E3 has become faster and more adaptable to different types of
measurements and has increased substantially the scientific output. Thick steel
samples of 45 mm [2] can be measured satisfactory within few days whereas before
a few weeks would have been necessary. Measurement of near surface have also
become easier and more reliable due to the well-defined gauge volume and reduced
aberrations as the gauge volume exits the material [3]. Texture measurements are
now faster and less laborious [4] as are the strain measurements as a function of
temperature [5]. The access of a tension-, compression-, torsion-stress-rig [6] has
also enhanced the instrument functionality. E3 has also been used for structural
determinations of single crystals at room temperature and at temperature using a
cryofurnace [7, 8]. This presentation will showcase the instrument’s multifunctional
abilities.
[1] R.C Wimpory, P. Mikula, J. Saroun, et al., Efficiency boost of the materials science
diffractometer E3 at BENSC: one order of magnitude due to a horizontally and vertically
focusing monochromator, Neutron News, 19 (1), pp. 16-19, 2008.
[2] V.V. Sumin, et al., Results of measuring the residual strains in the WWER-1000 reactor vessel, Physics of the Solid State, 52 (5), pp. 992-995, 2010.
[3] T. Fuß, R.C. Wimpory, M. Klaus, C. Genzel, Bridging gaps in surface zone residual
stress analysis using complementary probes for strain depth profiling, Mat. Sci. Forum, 681, pp. 411-416, 2011.
[4] M. Chmielus, et al., Magnetic-field-induced recovery strain in polycrystalline Ni-Mn-Ga foam, Jornal of applied Physics, 108 (12), p. 123526, 2010.
[5] M.Schobel, et al., Thermal fatigue damage in monofilament reinforced copper for heat
sink applications in divertor elements, J. of Nucl. Mat., 409 (3), pp. 225-234.
[6] R. Woracek, et al., Neutron Bragg-Edge-imaging for strain mapping under in-situ tensile loading, J. Appl. Phys.
[7] K. Rolfs, et al., Double twinning in Ni-Mn-Ga-Co, Acta Mat., 58 (7), pp. 2646-2651, 2010.
[8] K. Rolfs, R.C. Wimpory, W. Petry, R. Schneider.,Effect of alloying Ni-Mn-Ga with Cobalt on thermal and structural properties, J. of Physics: Conference series, 251, 2010.
