Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7971653 | Materials Science and Engineering: A | 2018 | 8 Pages |
Abstract
Boron in Ni-Fe-based weld metals exists in a state of segregation at the grain boundaries and as a solid solution in the matrix. Boron segregation increased the tensile and creep ductility at 700â¯Â°C by suppressing intergranular failure. Moreover, B-doped weld metals exhibited longer rupture lives and lower steady creep rates. However, these improvements disappeared during exposure to 700â¯Â°C within 2000â¯h, which was mainly attributed to a change in boron distribution from segregation at the grain boundaries to incorporation in M2B-type borides. The electron energy loss spectroscopy results indicated that boron did not diffuse into the M23C6 carbides.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Dong Wu, Tingting Yao, Dianzhong Li, Shanping Lu,