Fig. 1 A schematic illustration of the proposed neighboring indentation method54Lithographic technique is of pivotal importance in designing nanoscale patterns, yet it is too artificial and not suitable for large scale productions. We have developed an approach to design patterned nanomaterials w/o lithography by taking advantage of the nanophase separation that occurs during the oxidation of intermetallic compound [1,2]. To investigate the impact of nanophase separation on the developed facets, atomic scale analysis of the nanocomposite is also required. Hence, this study depicts atomic scale investigation of phase separation phenomenon. In this study we synthesized single-crystal Pt5Ce alloy ingots and studied their subsequent controlled nanophase separation. Utilizing a mono-arc furnace, we developed a more efficient and time-saving method than conventional techniques, such as the Bridgman method. Nanophase separation was induced through atmosphere treatment, resulting in well-defined Pt and CeO2 nanostructures. Characterization techniques confirmed the nanophase separation occurred in a highly controlled manner along the 0001 plane, a significant advancement in understanding the behavior of Pt5Ce alloys. Instrumented indentation test is an efficient approach to measure mechanical properties such as equivalent elastic modulus and hardness. In this study, we focus on the interaction between the existing and subsequent indentation tests to extract the plastic properties from the result of two indentation tests performed at neighboring positions. With this view, finite element simulations are performed to design suitable indentation condition and draw the response surfaces of the indentation results to determine the material constants of the plastic constitutive model. Eventually, the proposed approach is validated in applications to aluminum Poster Award NomineePoster Award NomineeP1-17Characterization of Mechanical Properties of Alloys Using Neighboring Indentation Test Dayuan Liu1, 2 and Ikumu Watanabe1, 2 1 Center for Basic Research on Materials, National Institute for Materials Science (NIMS) 2 Graduate School of Science and Technology, University of Tsukuba alloys and stainless steel, in which the material constants are read from the response surfaces.[1] K. Goto et al., Int. J. Plas., 116, 81-90 (2019). [2] T. Chen et al., STAM: M, 2, 416-424 (2022). P1-18Pt5Ce Single Crystal Ingot: Nanophase Separation from Synthesis to Characterization Sherjeel Mahmood Baig1,2, Ayako Hashimoto1,3, and Hideki Abe1,2 1 Research Center for Energy and Environmental materials, National Institute for Materials Science (NIMS) 2 Graduate School of Science and Engineering, Saitama University 3 Graduate School of Science and Technology, University of Tsukuba [1] S. M. Baig, S. Ishi, & H. Abe, Nanoscale Advances, 6, 6 (2024). [2] Y. Wen, H. Abe, K. Mitsuishi, & A. Hashimoto, Nanoscale, 13, 2096-2098 (2021).
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