新闻动态
综合新闻
科研动态
学术活动
媒体聚焦
通知公告
您现在的位置:首页 > 新闻动态 > 学术活动
10.9】师昌绪系列讲座
Prof. Merton C. Flemings
 
2013-09-26 | 文章来源:科技处        【 】【打印】【关闭

师昌绪系列讲座

TopicFluid and Semi-Solid Flow in Casting Processes

SpeakerProf. Merton C. Flemings

                 Massachusetts Institute of Technology (MIT)

Time: 10:00-12:00 AM., Wed., Oct. 9th, 2013

Venue: Room 403, Shichangxu Building, IMR CAS

Welcome to attend!

Abstract:

The engineering science of fluid and semi-solid flow has been critical to our modern understanding of casting processes, including macrosegregation, grain formation, hot tearing and semi-solid forming, as well as to the ancient process of puddling. We have come to understand how interdendritic flow leads to ingot macrosegregation and how bulk liquid convection leads to grain refinement. We are learning how dendritic grain structure affects semi-solid behavior under strain, and how that behavior affects hot tearing, shrinkage and segregation. Homogeneous thixotropic semi-solid flow is obtained in modern semi-solid forming by achieving a non-dendritic, fine grained structure. An ancient process that employed semi-solid flow is puddling (chao*). It was developed and employed in China in the early period of the Western Han dynasty (206 BC-24 AD) and re-discovered in the West only at the end of the 18th century. It remained an important process for producing wrought iron in both China and the West into the early 20th century. It is a quite interesting process when looked at through modern eyes; it demonstrated remarkable craftsmanship in the absence of the solidification understanding we have today.

文档附件

相关信息
联系我们 | 所长信箱 | 网站地图 | 友情链接
地址: 沈阳市沈河区文化路72号 邮编: 110016
管理员邮箱: office@imr.ac.cn
中国科学院金属研究所 版权所有 辽ICP备05005387号

官方微博

官方微信