ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Recent progress in engineering includes the development of new materials andinnovations in their processing and treatments. Material technologies, like the study of metals,alloys, ceramics and composites, especially non-destructive analyses of residual stresses profiles andtextures, have gained an increasing importance.The dedicated residual stress diffractometers E3 and E7 at BENSC, HMI, Berlin are alreadyequipped with new two-dimensional position sensitive detectors. An upgrade of the monochromatorsystem is planned for 2006 which includes perfectly bent silicon crystals in order to optimise bothintensity and angular resolution yielding a large gain of the diffractometer efficiency for strainmeasurements. A range of equipment for sample positioning is available, such as a closed Euleriancradle for samples with weights of up to 5 kg, a second cradle for heavy samples (up to 50 kg) withthe ability to tilt the samples up to 90° and a translation table carrying samples of up to 300 kg and1000 mm in diameter. Gauge volumes can be adjusted by a new computer controlled variable slitsystemin a range from 1x1x1 mm³ up to several mm³. In-situ residual stress analysis can beperformed within industrial components during mechanical or thermal loading (up to 2000 K).Rapid data visualization as well as evaluation is performed by the specially designed software. Thepowder diffraction pattern is calculated by summation over the scattering angle dependent Debye-Scherrer lines on the two-dimensional 400*400 mm² planar area detector.A large amount of beam time is exclusively used for industrial research. Among the componentsthat were investigated are crankshafts, impellers, pistons, cylinder heads, turbine blades and welds.Both instruments are similarly designed, where E3 is set up for higher flux and therefore penetrationdepths and E7 is designed for higher angular resolution
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.524-525.223.pdf
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