Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 29, Issue 4, Pages 387-392Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2013.02.007
Keywords
Grain refinement; Growth mechanism; Superalloy; Solidification
Funding
- State Key Laboratory of Solidification Processing of Northwestern Polytechnical University
Ask authors/readers for more resources
The mechanisms of grain refinement were investigated on two kinds of grain refiners used in Ni-Fe based superalloys and complete atomic matching modes were constructed in this study. It is found that there are at least three matching crystal planes having the small lattice disregistry between the refiner and the nucleated phase, which can lead to grain refinement of gamma matrix. The results indicate that the (0001), (01-10) planes of CrFeNb have a fine crystallographic matching relationship with the (111), (110) planes of gamma matrix. The disregistry of (0001)(CrFeNb)//(111)(gamma), (01 (1) over bar0)(CrFeNb)//(111)(gamma) and (01 (1) over bar0)(CrFeNb)//(110)(gamma) is 3.34%, 6.60% and 5.90%, respectively. The (0001), (01 (1) over bar0) planes of Co3FeNb2 and (111), (110) planes of gamma matrix also have this relationship. The disregistry of (0001)(Co3FeNb2)//(111)(gamma), (0001)(Co3FeNb2)//(110)(gamma), (01 (1) over bar0)(Co3FeNb2)//(111)(gamma) and (01 (1) over bar0)(Co3FeNb2)//(110)(gamma) is 4.45%, 9.35%, 8.38% and 6.12%, respectively.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available