报告题目：Modelling precipitation of non-spherical precipitates

报告人：Bjørn Holmedal 教授

主持人（邀请人）：贾海龙

报告时间：2022年12月20日16：00

线上会议ID：Zoom Meeting 919 7705 8442

入会密码：488549

线上会议链接：

https://NTNU.zoom.us/j/91977058442?pwd=bzYzQkt6M29yaUFFOERxNzhZMnlBZz09

主办单位：汽车材料教育部重点实验室，材料科学与工程学院

报告摘要：

Precipitation in age-hardenable aluminium alloys involves particles of non-spherical shapes, e.g., needles or plates. The classical Kampmann–Wagner Numerical (KWN) precipitation model is modified, deriving correction factors accounting for the particles’ shape. A growth-rate correction is derived from numerical solutions of the diffusion problem for three-dimensional cuboid particles and for axisymmetric rods of various aspect ratios. A second correction is derived for the Gibbs–Thomson effect.

个人简介：

Prof. Bjørn Holmedal is at the Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway. Bjørn Holmedal (born 1968) has an MSc in Mechanical Engineering from NTH (1992) and a PhD in Mathematics from the University of Oslo (1998). He has industrial experience as a researcher in Raufoss Technology (1997-2000), starting as a postdoc at NTNU in 2000. His research areas include:

(1) Metal continuum plasticity theory and modelling

(2) Metal crystal plasticity theory and modelling (including texture)

(3) Thermomechanical processing of alloys

(4) Strengthening and work hardening mechanisms in alloys

(5) Dislocation theory and modelling