Solute effects in grain boundary engineering |
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| Affiliation: | 1. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;2. Research Center for Strategic Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;1. Mechanical Engineering Department, Bu-Ali Sina University, Hamedan, Iran;2. Mechanical Engineering Department, Islamic Azad University, Takestan, Iran;1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, 110016 Shenyang, China;2. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Science, 110016 Shenyang, China;1. Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu City 30013, Taiwan, ROC;2. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu City 30013, Taiwan, ROC |
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| Abstract: | One of the most commonly overlooked parameters in grain boundary engineering initiatives is solute—interface interactions involving solute concentrations typically in the ppm range. In this work, experimental evidence is presented that demonstrates the significant effect of such interactions upon (1) the specific properties desired of “special” grain boundaries (e.g. resistance to corrosion) and (2) the resultant grain boundary character distribution following materials processing. Regarding the latter, it is shown how solute—grain boundary interactions impact significantly on the delicate balance of geometric (crystallographic), energetic, and kinetic influences. which ultimately dictates the grain boundary character distribution of engineered materials. |
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