特邀讲座嘉宾——吕喆

吕喆，加拿大阿尔伯塔大学博士后，分别于2020年和2025年获阿尔伯塔大学机械工程学士学位和材料工程博士学位。主要围绕承压装备与关键结构材料在长期服役、焊接及增材制造过程中的组织演化与力学性能退化开展研究，重点关注Cr–Mo钢、Grade 91钢及马氏体不锈钢在复杂热–力耦合条件下的微观组织演变、损伤机制及其对宏观力学性能的影响。通过结合多尺度实验表征与基于物理机制的数值模拟，建立从微观组织特征到宏观力学性能的定量关联，为服役装备寿命评估、焊接与增材制造工艺优化以及关键结构材料的安全服役提供理论依据和方法支撑。相关成果发表于Welding Journal, Journal of Materials Research and Technology, Materials Science and Engineering: A等期刊。曾获美国焊接学会AWS Savage Award、加拿大阿尔伯塔省Graduate Excellence Scholarship及多项奖学金。

Introduction to AcademicianZhe Lyu

Zhe Lyu is a Postdoctoral Fellow at the University of Alberta, where he received a BSc in Mechanical Engineering in 2020 and a PhD in Materials Engineering in 2025. His research focuses on the microstructural evolution and mechanical degradation of pressure-containing equipment and critical structural materials under long-term service, welding, and additive manufacturing conditions. His work integrates multiscale experimental characterization with physics-based numerical modeling to establish quantitative relationships between microstructural features and macroscopic mechanical properties. His research supports life assessment, process optimization, and the safe operation of critical engineering materials. His work has been published in Welding Journal, Journal of Materials Research and Technology, and Materials Science and Engineering: A. He is a recipient of the AWS Savage Award, the Alberta Graduate Excellence Scholarship, and several university-level scholarships.

主讲题目：多物理场模拟与跨尺度表征在焊接冶金及材料退化研究中的应用

Lecture Title:Applications of Multiphysics Modeling and Multiscale Characterization in Welding Metallurgy and Materials Degradation

讲座简介：将围绕多物理场模拟与跨尺度实验表征在焊接冶金及材料退化研究中的应用展开。以Cr–Mo钢为例，介绍材料在长期高温服役、焊接及增材制造过程中的微观组织演变与力学性能变化，重点讨论碳化物析出、晶界碳化物诱发损伤及局部应变集中等关键机制。讲座还将介绍如何综合运用微观组织表征、力学性能测试、晶体塑性有限元分析及基于物理机制的跨尺度建模方法，建立微观组织、局部损伤与宏观力学性能之间的定量关联，并探讨其在材料性能预测、服役寿命评估及制造工艺优化中的应用。此外，讲座将分享导师厉雷钧教授团队近期在焊接冶金、材料服役性能及先进制造等领域取得的研究进展与代表性成果。

Introduction to the Lecture Content:This lecture will focus on the applications of multiphysics modeling and multiscale experimental characterization in welding metallurgy and materials degradation. Using Cr–Mo steels as an example, it will examine microstructural evolution and changes in mechanical properties during long-term high-temperature service, welding, and additive manufacturing, with particular emphasis on carbide precipitation, grain-boundary-carbide-induced damage, and localized strain concentration. The lecture will also demonstrate how microstructural characterization, mechanical testing, crystal-plasticity finite element analysis, and physics-based multiscale modeling can be integrated to establish quantitative relationships among microstructure, localized damage, and macroscopic mechanical properties. Their applications in material performance prediction, service-life assessment, and manufacturing-process optimization will also be discussed. In addition, recent research progress and representative achievements from Professor Leijun Li’s research group in welding metallurgy, in-service material performance, and advanced manufacturing will be presented.

时间：2025年8月2日15:30—17:30

Time: 15:30—17:30, August 2, 2025

地点：太原科技大学材料学院八层会议室

Location: Eight-story conference room, School of Materials Science, Taiyuan University of Science and Technology