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
4.4】Prof. -Ing. Uwe Glatzel
Lee Hsun Lecture Series
 
2018-03-29 | 文章来源:李薰奖办公室        【 】【打印】【关闭

狮子机森林舞会下载 www.bottors.com Lee Hsun Lecture Series

Topic: Stress Contributions in Nickel-Base Superalloys

Speaker: Prof. Dr.-Ing. Uwe Glatzel
        Metals and Alloys, University Bayreuth, Germany

Time: 10:00-11:30, (Wed.) Apr.4th, 2018

Venue: Room 468,Lee Hsun Building, IMR CAS

Abstract:

Nickel-base superalloys are widely used as material for blades in flight engines or stationary gas turbines. These blades are manufactured in complex shapes as single crystals (SX). Due to centrifugal forces, a high constant stress of 100 MPa and more are present at the foot of the blade.

Several strengthening mechanisms are present in these two-phase materials. Internal stresses of most of these strengthening mechanisms can be estimated by simple considerations. Some of these internal stresses interact or transform into each other. Due to coarsening of precipitates, the Orowan stress needed to push a dislocation into a narrow matrix channel is drastically reduced during service.

A comparatively low and by theory difficult to estimate internal stress contribution is provided by solid solution strengthening of the matrix. This strengthening mechanism can be considered as the backbone and being steadily active. An intense research has been carried out within my group in order to estimate this strengthening mechanism experimentally and to quantify the influence of several important solid solution strengthening elements, such as W, Mo and Re. This research has opened the pathway for the development of a new SX Ni-base superalloy composition.

Taking these considerations as well as other demands on turbine blades into account, a somewhat speculative outlook will be presented toward materials which might replace SX Ni-base superalloys in future, summarized by the keywords "Beyond Nickel-Based Superalloys".

文档附件

相关信息
联系我们 | 所长信箱 | 网站地图 | 友情链接
狮子机森林舞会下载 地址: 沈阳市沈河区文化路72号 邮编: 110016
管理员邮箱: webmaster@www.bottors.com
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