| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
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| Presentation Title |
Evaluation of Misorientation and Local Deformation in Bimodal Harmonic Structured Stainless Steel by Hybrid Imagings of Diffraction and Refraction Contrast Using Synchrotron Radiation X-ray |
| Author(s) |
Yoshikazu Nakai, Shoichi Kikuchi, Daiki Shiozawa, Kenji Nonaka, Takumi Hase, Yuki Nakagawa, Kei Ameyama |
| On-Site Speaker (Planned) |
Yoshikazu Nakai |
| Abstract Scope |
A stainless steel, SUS304L, with a bimodal harmonic structure was fabricated using powder metallurgy. A three dimensional grain mapping technique for polycrystalline materials, called X-ray diffraction contrast tomography (DCT), was conducted at synchrotron radiation facility to evaluate the misorientation of each crystal, and refraction contrast tomography (RCT) was conducted to measure the local strain of a specimen under tensile loading for the bimodal harmonic structured stainless steel. The average value of the total misorientation tended to increase with stress during tensile tests; however, the total misorientation of the harmonic structured SUS304L was lower than that of SUS304L with homogeneous coarse grains at comparable stress. This is consistent with the results obtained by EBSD analysis, and showed that deformation in the bimodal harmonic structured alloy is localized in the fine grained structure. The local deformation, including necking, of the specimen in tensile loading was also successfully measured by RCT. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |