汇报时间：2023年08月30（星期三） 下午16:00
汇报地点：创新港2号巨构2-3F-033会议室
汇报人：席乃园
国际会议信息
会议名称：The 76th IIW Annual Assembly and International Conference on Welding and Joining
会议时间：July 16-21, 2023
会议地点：Marina Bay Sands Convention Centre, Singapore.
会议简介：
The 76th Annual Assembly of International Institute of Welding (IIW) and International Conference on Welding and Joining were organized by the National University of Singapore, Nanyang Technological Institute, and the Singapore Welding Society, aims to provide a platform for knowledge exchange and networking among scientists, researchers, and industry experts in the field of welding and joining. The meeting attracted thousands welding field academicians, professors, young scholars, and enterprise manufacturers from all over the world to participate in the sub-conference report. The participants covered more than 100 universities, enterprises, and research institutions from more than 30 countries. One of the tremendous strengths of the IIW is the opportunity for seamless cooperation between the different focus groups, drawing together a broad spectrum of relevant experts from around the world to focus on particular issues.
参会论文信息
Title: A Multi-Scale Perspective to Evaluate the Effects of δ-phase on Mechanical Behaviors of Additive Manufactured Inconel 718
Author: Naiyuan Xi, Xuewei Fang, Ke Huang
Abstract: The evolution of the δ-phase and the resultant mechanical properties for wire-arc additive manufactured (WAAM) Inconel718 were investigated in this work. Several heat treatment strategies, consist of homogenization, middle heat treatment and aging process, were firstly conducted to produce δ phases with different characteristics. The early evolution of the δ phase was then analyzed using transmission electron microscopy. The nanoindentation and tensile tests were also used to verify the strengthen response of δ phase. Results revealed that when the middle heat treatment time exceeded 2 hours, the amount of γ" was constrained by δ phase, and the coarsening of γ" phase accelerated. The yield strength of specimens with 1.471% volume fraction of δ phase is about 10% lower than that of specimens without δ phase. The decrease of γ" phase and the destruction of coherent γ"/γ interface are the main causes of strength loss in the WAAMed IN718.
