| Download | - View accepted manuscript: Plastic deformation and fracture behavior of a Fe-modified Al3 Ti-base L12 intermetallic alloy (PDF, 2.4 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1557/JMR.1991.0957 |
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| Author | Search for: Hu, Gengxiang; Search for: Chen, Shipu; Search for: Wu, Xiaohua; Search for: Chen, Xiaofu |
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| Format | Text, Article |
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| Subject | plastic deformation |
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| Abstract | The microstructure of the ordered intermetallic alloy with a nominal composition of Al66Fe9Ti24 is nearly single-phase L12 structure, with a few second phase agglomerates at some grain corners. Room temperature compression tests showed that this material exhibits a plastic strain of about 11% at fracture. Final fracture of the compression specimens occured by a shear-off process along a surface oriented about 45 degrees to the compression axis. Fractographic analysis revealed that the fracture is transcrystalline and the fracture mode is mainly quasicleavage plus tearing. Transmission electron microscopy (TEM) was used to explore its deformation mechanisms. The dislocation density was low after homogenization, but is greatly increased during deformation. The deformation mode was found to be {110}{111} slip instead of twinning as in Al3Ti. The Α{110} superdislocations dissociated into two partials of Α/3(211)-type, bounding a superlattice intrinsic stacking fault (SISF) on the {111} slip plane. |
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| Publication date | 1991-05 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC publication | This is a non-NRC publication"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC. |
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| NPARC number | 21276877 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 45bb1bc5-1c15-4ae0-b4fb-9ec1b62ba257 |
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| Record created | 2015-10-30 |
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| Record modified | 2020-06-04 |
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