报告题目：Residual stress analysis on samples obtained by additive fabrication

报告时间：2024年4月22日（周一）9:00-10:30

报告地点：国家工程中心320会议室

报告人：嵇宁 教授（巴黎萨克雷大学）

报告人简介：

Vincent Ji (嵇宁), graduated in Beihang University on 1984 (Bachelor, Mat. Sci. & Engin.), in UniversitéParis-Saclay on 1986 (Master deg., Metallurgy and Mat.) and in Arts et Métier ParisTech on 1989 (PhD, Mechanics & Materials). Served successively as assistant, associated professor, PhD supervisor from 1989 to 2007 in Arts et Métier ParisTech. Since 2007, full professor in Université Paris-Saclay and director of Materials department of Polytech Paris-Saclay, the Engineering school of the Université Paris-Saclay. Distinguished Professor since 2016 and director of department of Materials, Mechanics and Energy in Polytech Paris-Saclay from 2018 to 2023.

The research activities of Vincent Ji aim to the study of fundamental mechanisms and industrial applications of alloys’ surface strengthening, surface modifications, surface coatings and surface residual stress analysis. Author and co-Author of more than 360 SCI indexed publications (H factor= 47 and more than 7400 citations); supervisor of 25 PhD students and 32 Master students; co-supervisor of 20 PhD students.

报告内容简介：

Residual stresses can be generated during and after the additive fabrication (AF) of metallic components. The existence of residual stress influences largely the structure durability of sample. It is very important to determine quantitatively the residual stress levels and their distribution in AF samples.

Nimonic C263 alloy samples have been fabricated by Selective Laser Melting (SLM) and by Direct Metal Deposition (DMD) process, TiAl samples have been realized with DMD process. Tensile tests and Vicker’s micro-hardness have been performed on just fabricated and heat treated additive fabricated samples to check the conventional mechanical characteristics. The corresponding residual stresses have been analysis by XRD method on samples just-fabricated and after heat treatment.