TY - JOUR
T1 - Internal stress measurements by high-energy synchrotron X-ray diffraction at increased specimen-detector distance
AU - Böhm, J.
AU - Wanner, A.
AU - Kampmann, R.
AU - Franz, H.
AU - Liss, K. D.
AU - Schreyer, A.
AU - Clemens, H.
N1 - Funding Information:
Financial support by the Deutsche Forschungsgemeinschaft (DFG), Bonn, Germany, through Project No. SFB381/A1 is gratefully acknowledged. The diffraction measurements were carried out at beamlines BW5 and PETRA2 of the Hamburger Synchrotronstahlungslabor (HASYLAB) at Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany. We thank HASYLAB staff for their excellent technical support.
PY - 2003/1
Y1 - 2003/1
N2 - High-energy X-ray diffraction has recently been shown to be a viable technique to measure volume-averaged lattice strains in the bulk of metallic polycrystals at increased speed compared to neutron diffraction. The established procedure is to irradiate the sample under investigation with monochromatic X-rays (∼100 keV) and to record complete diffraction rings with an area detector. The lattice strains are obtained by analyzing the minute distortions of these rings. In the present paper we present first results obtained using a setup in which two area detectors are positioned at a large distance (7 m) from the specimen. Although only segments of the rings can be recorded this way, this approach offers a number of advantages. In situ tensile tests were performed on a γ-TiAl-based alloy as an example to demonstrate the potential of the method. Both materials science aspects as well as consequences for further method development will be discussed.
AB - High-energy X-ray diffraction has recently been shown to be a viable technique to measure volume-averaged lattice strains in the bulk of metallic polycrystals at increased speed compared to neutron diffraction. The established procedure is to irradiate the sample under investigation with monochromatic X-rays (∼100 keV) and to record complete diffraction rings with an area detector. The lattice strains are obtained by analyzing the minute distortions of these rings. In the present paper we present first results obtained using a setup in which two area detectors are positioned at a large distance (7 m) from the specimen. Although only segments of the rings can be recorded this way, this approach offers a number of advantages. In situ tensile tests were performed on a γ-TiAl-based alloy as an example to demonstrate the potential of the method. Both materials science aspects as well as consequences for further method development will be discussed.
KW - Grain size
KW - Internal stress measurement
KW - Monochromatic high-energy X-rays
KW - Synchrotron X-ray diffraction
KW - Transmission
UR - http://www.scopus.com/inward/record.url?scp=0037250701&partnerID=8YFLogxK
U2 - 10.1016/S0168-583X(02)01694-4
DO - 10.1016/S0168-583X(02)01694-4
M3 - 文章
AN - SCOPUS:0037250701
VL - 200
SP - 315
EP - 322
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
SN - 0168-583X
ER -