报告题目：纳米晶表界面力学行为原位研究
报告时间：2026.1.15（周四）14:00
报告地点：常州校区56-436
报 告 人：王 向 教授
邀 请 人：赵永好 教授
主办单位：好色视频
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报告人简介
王 向， 北京科技大学特聘教授、博士生导师。本科毕业于南京理工大学，博士毕业于美国匹兹堡大学，随后在美国西北太平洋国家实验室进行博士后研究。获国家青年人才项目、北科鼎新学者等。主要从事金属材料力学行为与微观结构表征、原位纳米力学与原子尺度摩擦学研究。在材料学国际学术期刊以第一作者（含共同）或通讯作者发表论文15篇，其中包含Nature Materials (1), Nature Nanotechnology (1), Nature Communications (2)等, 引用1000 余次，H 因子 17，在矿物、金属与材料年会”(TMS)、 “材料研究学会春秋季年会”(MRS)、 “材料科学与技术年会”(MS&T)、中国电子显微学年会等国内外重要学术会议上作报告 12次。担任 Nature Communications 、 Wear、 Intermetallics 、Journal of Materials Research、 JOM等期刊审稿人。
摘 要
In this presentation, in-situ transmission electron microscopy (TEM) was employed to study interfacial mechanics in nanocrystals, enhancing the understanding of deformation and tribological behaviors at atomic-scale. By tracking the surface atom migration in nanocrystals, one mechanism effectively integrating the diffusive and displacive plasticity was proposed to elucidate the reverse “Hall-Patch” effect / “smaller is weaker” in nanocrystals. Furthermore, high loading stress and complex loading methods were developed to explore the stability of twin boundary in body-centered cubic (BCC) metals, as well as the evolution of multi-fold twins in face-centered cubic (FCC) metals. Leveraging advancements in in-situ mechanics and atomic-scale observations under TEM, two novel approaches were developed to investigate atomic-friction, uncovering two distinct tribological behaviors. These works provided valuable experimental data and theoretical insights for fundamental research in materials science, materials processing technologies, and tribology.