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TL;DR: In this paper, in-situ neutron diffraction experiments on Fe-C alloys were performed to determine the lattice parameter of the austenitic and ferritic phases in a temperature region from just below to just above the bi-phasic austenite/ferrite region.
Abstract: Despite its relevance for various calculations involving phase transformations in Fe-C alloys, little information is available on the lattice parameter of austenite at elevated temperatures and its dependence on the carbon concentration. Furthermore, severe scatter exists in the literature for the lattice parameter at high temperature. Most literature data were acquired using X-ray diffraction, although neutron diffraction seems to be a more suitable technique penetrate and probe a large volume of material, the advantages of neutron diffraction over X-ray diffraction are its reduced sensitivity to surface decarbonization and improved crystal statistics (both decarbonization and grain growth can occur during diffraction experiments at high temperatures requiring long exposure times). In this work in-situ neutron diffraction experiments on Fe-C alloys were performed to determine the lattice parameter of the austenitic and ferritic phases in a temperature region from just below to just above the bi-phasic austenite/ferrite region.
213 citations
TL;DR: It is suggested that a low-dose-rate pre-exposure to ionizing radiation induces an adaptive response in C3H 10T1/2 cells, and that this response enhances DNA double-strand break repair when cells are subsequently exposed to a second radiation dose.
Abstract: We have monitored the end points of cellular survival, micronucleus formation and neoplastic transformation frequency to assess adaptation to ionizing radiation in the C3H 10T1/2 mouse embryo cell ...
209 citations
TL;DR: In this article, tensile test specimens were fabricated with increasing levels of compressive and tensile residual stress on the surface and through the thickness of the specimen and these residual stresses were then measured by neutron diffraction at multiple points along the length and through depth of the specimens.
206 citations
15 Jun 2005-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the authors measured residual stresses in LENS® samples of 316 stainless steel and Inconel 718 having simple geometrical shapes by both neutron diffraction and the contour methods.
Abstract: During manufacturing of components by laser engineered net shaping (LENS®), a solid freeform fabrication process, the introduction of residual stresses causes deformation or in the worst case, cracking. The origin is attributed to thermal transients encountered during solidification. In the absence of reliable predictive models for the residual stresses, measurements are necessary. Residual stresses were measured in LENS® samples of 316 stainless steel and Inconel 718 having simple geometrical shapes by both neutron diffraction and the contour methods. The results by the two methods are compared and discussed in the context of the growth direction during the LENS® process. Surprisingly, the residual stresses are practically uni-axial, with high stresses in the growth direction.
203 citations
TL;DR: In this paper, a reduction in asymmetry was attributed to reduced rates of twinning in the presence of Mg17Al12 precipitates, which was confirmed by texture and microstructure analyses, which showed a reduction of the scale and volume fraction of twins in aged and solution treated samples examined at equivalent levels of strain.
203 citations
Authors
Showing all 2298 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Michael D. Guiver | 78 | 288 | 20540 |
| Robert J. Birgeneau | 78 | 587 | 22686 |
| Mike D. Flannigan | 71 | 211 | 21327 |
| Martin T. Dove | 61 | 396 | 14767 |
| Luis Rodrigo | 58 | 341 | 12963 |
| André Longtin | 56 | 260 | 16372 |
| David Mitlin | 56 | 196 | 15479 |
| John Katsaras | 55 | 220 | 9263 |
| John E. Greedan | 55 | 391 | 12171 |
| Gang Li | 48 | 406 | 7713 |
| Matthew G. Tucker | 45 | 224 | 7288 |
| Bruce D. Gaulin | 45 | 284 | 6698 |
| Erick J. Dufourc | 43 | 144 | 5882 |
| Norbert Kučerka | 43 | 119 | 7319 |
| Stephen J. Skinner | 42 | 194 | 8522 |