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| Electronic Structure Characterization of Bonding of Grain Boundaries and Fracture Mode of Steels |
| ZHANG Xiaozhong; ZHANG Lina; MA Yue; QI Junjie; YUAN Jun |
| Department of Materials Science and Engineering; Tsinghua University; Beijing 100084 |
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Cite this article:
ZHANG Xiaozhong; ZHANG Lina; MA Yue; QI Junjie; YUAN Jun. Electronic Structure Characterization of Bonding of Grain Boundaries and Fracture Mode of Steels. Acta Metall Sin, 2005, 41(6): 617-621 .
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Abstract Electron energy loss spectroscopy (EELS) was used to study grain
boundaries in steels. The normalized 3d occupancies of states of
irons both in bulk and at grain boundary were calculated according
to the EELS data which are related to the change in the bonding of grain
boundaries and the fracture mode of the steels. It is found that if the
grain boundary (GB) has a higher occupancy of 3d states of iron than
that of the bulk, the sample has a weak bonding of GB and tends to
intergranular fracture. Otherwise if the GB has almost the
same occupancy of 3d state of iron as the bulk, the sample has a strong
bonding of GB and tends to transgranular fracture.
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Received: 13 September 2004
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