主讲人：Javier LLorca,西班牙马德里高等材料研究院

时间：2025年4月14日  10:00

地 点：三一大楼506

报告摘要:

A combined experimental and simulation strategy is presented to evaluate the influence ofgrain boundaries on the deformation of Ti. From the experimental viewpoint, the ability of grainboundary to allow slip transfer or to block slip was studied by 3D diffraction contrast tomography;lip trace analysis, electron backscatter diffraction and high-resolution digital image correlationMechanical deformation led to the activation of a prismatic slip and slip transter/blocking wereassessed in > 300 grain boundaries. The accuracy of slip transfer criteria was statistically assessedand this information was used to incorporate the effect of grainboundaries in adisocation-baseccrystal plasticity model. This novel crystal plasticity modelwas used to predict the Hall-Petcheffect in Ti polycrystals by means of computationalhomogenization of a representative volu6element of the microstructure was generated from the 3D data, ensuring a direct correspondencebetween model and microstructure. The analysis of the experiments alongside the numericasimulations provided a comprehensive understanding of the deformation mechanisms across grairboundaries in pure Ti polycrystals

主讲人简介:

Javier LLorca.西班牙IMDEA材料研究所主任和马德里理工大学教授。LLorca教授的研究重点是开发用于交通、能源和生物工程的新材料。通过不同的计算工具和多尺度建模策略建立材料的加工-结构-性能关系等，以及通过原位表征技术，关注生物、化学和机械过程不同组织之间的相互作用。这些信息被用于设计采用先进加工技术(包括金属合金、聚合物和复合材料的增材制造、磁控溅射等)制造的新材料。LLorca教授是美国Fulbright研究员、欧洲力学学会会员以及欧洲科学院院士、西班牙萨拉戈萨皇家科学院院士，曾任美国布朗大学、中国上海交通大学、中南大学、燕山大学客座教授，荣获西班牙LeonardoTorres Quevedo国家工程研究奖、美国TMS莫里斯·科恩奖等奖项。LLorca教授是<Modellingand Simulation in Materials Science and Engineering>杂志主编,<Materials Research Letters>杂志编辑，<Journal of Magnesium and Alloys>杂志编委，也是<Composites Science andTechnology>、<Iaterials Science and EngineeringA>等多篇杂志的副主编。