期刊
JOURNAL OF MICROSCOPY
卷 254, 期 3, 页码 157-165出版社
WILEY-BLACKWELL
DOI: 10.1111/jmi.12128
关键词
DDC; high temperature; in situ testing; Ni-base alloys; SEM
类别
资金
- Brazilian Center for Research on Energy and Materials (CNPEM)
- FAPESP
- CNPq
Nowadays, the implementation of sophisticated in situ electron microscopy tests is providing new insights in several areas. In this work, an in situ high-temperature strain test into a scanning electron microscope was developed. This setup was used to study the grain boundary sliding mechanism and its effect on the ductility dip cracking. This methodology was applied to study the mechanical behaviour of Ni-base filler metal alloys ERNiCrFe-7 and ERNiCr-3, which were evaluated between 700 degrees C and 1000 degrees C. The ductility dip cracking susceptibility (threshold strain; epsilon(min)) for both alloys was quantified. The epsilon(min) of ERNiCrFe-7 and ERNiCr-3 alloys were 7.5% and 16.5%, respectively, confirming a better resistance of ERNiCr-3 to ductility dip cracking. Furthermore, two separate components of grain boundary sliding, pure sliding (S-p) and deformation sliding (S-d), were identified and quantified. A direct and quantitative link between grain boundary tortuosity, grain boundary sliding and ductility dip cracking resistance has been established for the ERNiCrFe-7 and ERNiCr-3 alloys.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据