Strengthening Mg by self-dispersed nano-lamellar faults
| Autor: | Kristopher A. Darling, Jinshan Li, Zi Kui Liu, Yi Wang, Xidong Hui, Suveen N. Mathaudhu, William Yi Wang, Hongyeun Kim, Hongchao Kou, Laszlo J. Kecskes, Bin Tang, Shun Li Shang |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Phonon Shockley partial dislocations Stacking Local phonon density of state 02 engineering and technology long periodic stacking-ordered structures 01 natural sciences bonding charge density Matrix (mathematics) Condensed Matter::Materials Science Planar 0103 physical sciences Nano lcsh:TA401-492 General Materials Science Lamellar structure stacking faults 010302 applied physics Charge density 021001 nanoscience & nanotechnology Crystallography Chemical physics Density of states lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology |
| Zdroj: | Materials Research Letters, Vol 5, Iss 6, Pp 415-425 (2017) |
| ISSN: | 2166-3831 |
| Popis: | Here, we show the strategies to strengthen Mg alloys through modifying the matrix by planar faults and optimizing the local lattice strain by solute atoms. The anomalous shifts of the local phonon density of state of stacking faults (SFs) and long periodic stacking-ordered structures (LPSOs) toward the high-frequency mode are revealed by HCP-FCC transformation, resulting in the increase of vibrational entropy and the decrease of free energy to stabilize the SFs and LPSOs. Through integrating bonding charge density and electronic density of states, electronic redistributions are applied to reveal the electronic basis for the ‘strengthening’ of Mg alloys. IMPACT STATEMENT Through integrating the bonding charge density, the phonon and electronic density of states, this work provides an atomic and electronic insight into the strengthening mechanism of Mg alloys. |
| Databáze: | OpenAIRE |
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