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| 1 | High-throughput development and applications of the compositional mechanical property map of the β titanium alloys显示文摘By a combination of the nanoindentation and electron probe microanalysis(EPMA)techniques,the traditional diffusion couple technique is extended to map the mechanical property of β-type Ti alloys over a wide composition range,which can be utilized to develop very versatile novel bio-Ti alloys for hard tissue re placements in arti ficial bones,joints,and dental implants.To create complete single-phase composition ranges of Ti-based bcc solid solution,12 types of bcc Ti-Nb-Zr-Mo/Ti-Nb-Zr-Ta quaternary diffusion couples were fabricated and annealed at 1273 K for 25 h.In this way,the composition-mechanical property relationships in the vast composition space of Ti-based alloys were established using EPMA and nanoindentation probes.Notably,the measured composition-dependent Young’s moduli,hardness,and elastic recovery as well as the derived ratio of hardness to Young’s modulus,and the ratio of the cube of hardness to the square of Young’s modulus,in the developed compositional mechanical property database,were visualized in a five-dimensional scatter plot.This enables an effective tool to screen the Ti-Nb-Zr-based alloys fororthopedic and dental applications according to different clinical requirements,and to rationalize the fundamental mechanical relationships in the rapid development of β-Ti alloys. | Jinfeng Ling Dandan Huang Kewu Bai Wei Li Zhentao Yu Weimin Chen | 2021 | Journal of Materials Science & Technology2021，，12： | 3 |
| 2 | Assessment of the Zn-Fe-Al system for kinetic study of galvanizing显示文摘 | Bai Kewu Wu Ping | 2002 | Journal of Alloys and Compounds2002，347，： | 1 |
| 3 | First-principles study of Sn and Ca doping in CuInO2 显示文摘 | Liu Li Bai Kewu Gong Hao | 2005 | Phys Rev B: Condens Matter Mater Phys2005，72，12： | 1 |
| 4 | Assessment of Zn-Fe-Al system for kinetic study of galvanizing 显示文摘 | Kewu Bai Ping Wu | 2002 | Journal of Alloys and Compounds2002，347，： | 1 |
| 5 | 难熔多组元Ti−Nb−Zr−W合金随成分变化弹塑性和扩散性能的高通量探索显示文摘组合材料合成和分析方法能够很好地描述Ti−Nb−Zr−W体系难熔多元合金的弹塑性和扩散特性。在1273 K温度固溶退火25 h后制备6组Ti−Nb−Zr−W四元扩散偶,并对其开展电子探针显微分析和纳米压痕测试。随后,采用Oliver−Pharr和反向分析算法等方法获得Ti−Nb−Zr−W体系宽广成分范围的随成分变化弹塑性。此外,采用机器学习和实用高效数值回归方法分别建立Ti−Nb−Zr−W体系体心立方相的弹塑性和互扩散系数数据库。同时,提出由杨氏模量与主互扩散系数之比所定义的热加工性能参数来评估热加工过程行为。最后,讨论难熔多元合金的耐磨性并进行实验验证。结果表明,低钨含量的富Ti难熔多元合金具有高硬度、良好的耐磨性、高应力和良好的热加工性能,而高钨含量并不能改善富Ti难熔合金的弹塑性。 | 闻祝浩 林浩钦 陈伟民 Kewu BAI 张利军 | 2023 | Transactions of Nonferrous Metals Society of China2023，33，9： | 0 |
| 6 | Unravelling the metal borides evolution in the transient liquid phase bonding of Ni-based alloys via high-throughput transmission electron microscopy and first-principles thermo-kinetic calculations显示文摘The understanding of temperature and time-dependent metal borides precipitation/dissolution is crucial for the design of the transient liquid phase(TLP)bonding process of Ni-based alloys.It however remains elusive despite substantial research efforts for many years mainly owing to the uncertainty on the precipitated metal borides and the complex thermo-kinetics in the process.In this paper,we have unambiguously constructed the micro/nano scale map of the precipitated metal borides in the TLP bonded Ni-based Inconel 718 superalloy via a high-throughput transmission electron microscopy(TEM)analysis.Five types of metal borides were found to precipitate in the diffusion affected zone(DAZ)when the isothermal solidification is completed.They are the M_(5)B_(3)with stacking faults,Ti-rich M_(3)B4,and Nb-rich M_(3)B4 at the grain boundaries as well as single-crystalline M_(5)B_(3)and M_(3)B2 inside the grains.Notably,the crystal structure of the faulted M_(5)B_(3)was rationalized by a hybrid modelling approach integrating firstprinciples calculation and TEM experiments.The sublattice model,with the optimized thermodynamic model parameters,was used to reproduce the metal borides precipitation map in the TLP process using DICTRA software.Coupling with multiscale simulation and experimental data,the present work built a modified thermo-kinetic model,which enables the design of the TLP bonding process of Ni-based alloys that often involves complicated time-tempe rature schedules and the precipitation/dissolution of a variety of diffe rent phases.The strategy can be applied to the design of the brazing process of other alloys or hybrid materials such as ceramics and metal. | Kewu Bai Ming Lin | 2021 | Journal of Materials Science & Technology2021，，26： | 0 |
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