摘要
镍基单晶高温合金因具有优异的高温综合性能广泛应用于制造航空发动机涡轮叶片。提高合金承温能力是镍基单晶高温合金研发的难题,迫切需要理清服役条件下合金成分作用及机理、显微组织演化规律及其对性能的影响。功能多样、性能强大的透射电子显微镜为镍基单晶高温合金显微组织结构演化和微观强化机制的研究以及合金成分设计带来了新的机遇。本文简单综述了透射电子显微学在镍基单晶高温合金中两相元素分布、缺陷及其行为规律、相界面特征及其作用等最新研究成果,并对先进原位高温力学TEM技术的发展及在镍基单晶高温合金中的研究进行了展望。
Ni-based single crystal superalloys are widely used as turbine blade materials in the aeroengine industry due to their comprehensively excellent high temperature performances.The key deadlock in the Ni-base single crystal superalloy field is to improve the temperature bearing capacity of the alloys,which needs a thoroughly understanding how alloying elements and microstructures affect the behavior of the alloy under service conditions.The super transmission electron microscope(TEM)with advanced functions and powerful tools brings new opportunities for the study of microstructure,defect evolution and hence the strengthening mechanism of Ni-base single crystal superalloy.This article provides an overview on the recent progress in the applications of advanced TEM on Ni-base single crystal superalloys,such as element distribution of two phases,defects,interfaces,and their corresponding behaviors under various temperatures/stresses.The development of in situ high-temperature/large-stress TEM technology and its potential application in the Ni-base single crystal superalloys are also discussed.
作者
丁青青
贝红斌
赵新宝
张泽
DING Qing-qing;BEI Hong-bin;ZHAO Xin-bao;ZHANG Ze(School of Materials Science and Engineering,Zhejiang University,Hangzhou Zhejiang 310027,China)
出处
《电子显微学报》
CAS
CSCD
北大核心
2020年第5期586-602,共17页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金资助项目(No.51988101,No.91960201)
浙江省重点研发计划(No.2020C01002)
浙江省自然科学基金资助项目(No.LQ20E010008)
中央高校基金科研业务费专项资金资助项目(No.2020QNA4004)
浙江省科创新材料研究院资助项目。
关键词
透射电子显微学
镍基单晶高温合金
成分分布
晶体缺陷
形变机理
相界面
transmission electron microscopy
Ni-base single crystal superalloys
chemical distribution
crystal defects
deformation mechanism
phase boundary
作者简介
丁青青(1992-),女(汉族),江西人,讲师.E-mail:qq_ding@zju.edu.cn;通讯作者:张泽(1953-),男(汉族),天津人,教授,博士研究生导师.E-mail:zezhang@zju.edu.cn;通讯作者:贝红斌(1969-),男(汉族),浙江人,教授,博士研究生导师.E-mail:hbei2018@zju.edu.cn。
