Determining the activation energies and slip systems for dislocation nucleation in body-centered cubic Mo and face-centered cubic Ni single crystals

L. Wang; H. Bei; T. L. Li; Y. F. Gao; E. P. George; T. G. Nieh

doi:10.1016/j.scriptamat.2011.03.036

Author(s)

L. Wang
H. Bei
T. L. Li
Y. F. Gao
E. P. George

Detail(s)

Original language	English
Pages (from-to)	179-182
Journal / Publication	Scripta Materialia
Volume	65
Issue number	3
Publication status	Published - Aug 2011
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.scriptamat.2011.03.036 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-79957504619&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(bad2b937-7110-4739-a28a-ce968ead9d95).html

Abstract

Nanoindentation tests were performed on single crystals of Mo and Ni. The critical shear stress for the first pop-in was ∼1/7 of the shear modulus in both crystals. The dependence of pop-in probability on load was understood in terms of a thermally activated dislocation nucleation process. Comparison of the activation energies suggests nucleation of full dislocations in Mo and partial dislocations in Ni. The activation energy analysis also offers information on the specific slip system on which dislocations are nucleated. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Research Area(s)

Activation energy, Crystal structure, Dislocation nucleation, Nanoindentation, Pop-in

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Citation Format(s)

[ RIS ] [ BibTeX ]

Determining the activation energies and slip systems for dislocation nucleation in body-centered cubic Mo and face-centered cubic Ni single crystals. / Wang, L.; Bei, H.; Li, T. L. et al.
In: Scripta Materialia, Vol. 65, No. 3, 08.2011, p. 179-182.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Wang, L, Bei, H, Li, TL, Gao, YF, George, EP & Nieh, TG 2011, 'Determining the activation energies and slip systems for dislocation nucleation in body-centered cubic Mo and face-centered cubic Ni single crystals', Scripta Materialia, vol. 65, no. 3, pp. 179-182. https://doi.org/10.1016/j.scriptamat.2011.03.036

Wang, L., Bei, H., Li, T. L., Gao, Y. F., George, E. P., & Nieh, T. G. (2011). Determining the activation energies and slip systems for dislocation nucleation in body-centered cubic Mo and face-centered cubic Ni single crystals. Scripta Materialia, 65(3), 179-182. https://doi.org/10.1016/j.scriptamat.2011.03.036

Wang L, Bei H, Li TL, Gao YF, George EP, Nieh TG. Determining the activation energies and slip systems for dislocation nucleation in body-centered cubic Mo and face-centered cubic Ni single crystals. Scripta Materialia. 2011 Aug;65(3):179-182. doi: 10.1016/j.scriptamat.2011.03.036

Wang, L. ; Bei, H. ; Li, T. L. et al. / Determining the activation energies and slip systems for dislocation nucleation in body-centered cubic Mo and face-centered cubic Ni single crystals. In: Scripta Materialia. 2011 ; Vol. 65, No. 3. pp. 179-182.