G.L. Li
,
X.M. Meng
,
F. T. Zhang and Y.K. Wu (Laboratory of Atomic Imaging of Solids
,
Institute of Metal Research
,
Chinese Academy of Sciences
,
Shenyang 110015
,
China)
金属学报(英文版)
The atomic level structures of fcc/bcc interfaces in an Fe-9Ni alloy have been examined by means of HREM. It has been found that the orientation of γ /α interface had great effects on its atomic structure. These interfaces with different orientations may be composed of only structural ledges, structural ledges with misfit dislocations,superledges with misfit dislocations or only misfit dislocations. A structural model of growth ledge was suggested. The terrace of growth ledge was composed of structuralledges or misfit dislocations. The atomic structure of the riser of growth ledge was the same as that of the side facet of γlath, which is composed of saperiedges with misfitdislocations.
关键词:
Fe-9Ni alloy
,
null
,
null
,
null
,
null
G.P.Li
,
D.Li
,
Y.Y.Liu
,
S.X. Guan and Q.J.Wang (Department of Titanium Alloys
,
Institute of Metal Research
,
The Chinese Academy of Sciences
,
Shenyang 110015
,
China)
金属学报(英文版)
TEM examination proves that the second phase particle within the as-forged Ti-55alloy consists of either bright or dark "matrix" (nano-Nd3Sn) and some small dark blocks (SnO) dispersed in the "matrix". The HREM observation shows that the nanoNd3Sn phase is roughly spherical and about 3-15nm in diameter, and the grain boundaries with atout 1nm width are "gas-like" structure.
关键词:
Ti alloy
,
null
,
null
