Grain Boundary Character Dependence on Nucleation of Discontinuous Precipitates in Cu-Ti Alloys
AbstractThe dependence of the grain boundary character distribution for a Cu-4 at. % Ti polycrystal alloy (average grain size: 100 µm) on the nucleation of cellular discontinuous precipitates was systematically investigated. In an alloy over-aged at 723 K, cellular discontinuous precipitates consisted of a terminal Cu solid solution and a stable β-Cu4Ti lamellae nucleated at grain boundaries. Electron backscatter diffraction analysis revealed that the discontinuous precipitation reaction preferentially occurred at random grain boundaries with a Σ value of more than 21 according to the coincidence site lattice theory. On the other hand, few cellular discontinuous precipitates nucleated at low-angle and low-Σ boundaries, particularly twin (Σ 3) boundaries. These findings suggest that the nucleation of discontinuous precipitates is closely correlated with grain boundary character and structure, and hence energy and/or diffusibility. It should therefore be possible to suppress the discontinuous precipitation reaction through control of the alloy’s grain boundary energy, by means of texture control and third elemental addition. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Semboshi, S.; Sato, M.; Kaneno, Y.; Iwase, A.; Takasugi, T. Grain Boundary Character Dependence on Nucleation of Discontinuous Precipitates in Cu-Ti Alloys. Materials 2017, 10, 415.
Semboshi S, Sato M, Kaneno Y, Iwase A, Takasugi T. Grain Boundary Character Dependence on Nucleation of Discontinuous Precipitates in Cu-Ti Alloys. Materials. 2017; 10(4):415.Chicago/Turabian Style
Semboshi, Satoshi; Sato, Mitsutaka; Kaneno, Yasuyuki; Iwase, Akihiro; Takasugi, Takayuki. 2017. "Grain Boundary Character Dependence on Nucleation of Discontinuous Precipitates in Cu-Ti Alloys." Materials 10, no. 4: 415.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.