| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
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| Symposium
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Integration between Modeling and Experiments for Crystalline Metals: From Atomistic to Macroscopic Scales IV
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| Presentation Title |
Mapping the Dislocation Density Around a SS316L Weld Using Synchrotron X-ray Diffraction to Validate Finite Element Method Plasticity Modeling |
| Author(s) |
Lucas Andre Ravkov, Ondrej Muransky, Levente Balogh |
| On-Site Speaker (Planned) |
Lucas Andre Ravkov |
| Abstract Scope |
High-energy synchrotron X-ray diffraction measurements were conducted in a grid pattern on the cross section of a three-pass weld specimen, consisting of 515 measurement locations in a 30 mm x 18 mm area, with over 12000 individual diffraction patterns obtained. A software was developed to extract the Full Width at Half Maximum (FWHM) and the position of every reflection in each of the ~12000 patterns using non-linear least squares fitting. Analysis of the peak broadening (FWHM) versus grid position reveals that the highest level of plastic strain is found in the Heat Affected Zone (HAZ) of the weld. Full-pattern Diffraction Line Profile Analysis (DLPA) combined with modified Williamson-Hall analysis is performed to quantitatively determine the dislocation density versus location around the weld. The obtained DLPA results are then compared to EBSD measurements, and Finite Element (FE) predictions of the same region to validate the applied plasticity models. |