Revealing interfacial diffusion kinetics in ultra-fine-laminated Ni with low-angle grain boundaries

Autor:	Z. B. Wang, S. V. Divinski, Z. P. Luo, Y. Buranova, G. Wilde, K. Lu
Jazyk:	angličtina
Rok vydání:	2017
Předmět:	Ultra-fine laminated dynamic plastic deformation Ni diffusion low-angle grain boundary Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Materials Research Letters, Vol 5, Iss 8, Pp 577-583 (2017)
Druh dokumentu:	article
ISSN:	2166-3831 21663831
DOI:	10.1080/21663831.2017.1368036
Popis:	An ultra-fine-laminated (UFL) Ni sample with a high fraction of low-angle grain boundaries (LAGBs) was produced by dynamic plastic deformation. And self-diffusion behavior was studied in this material by the radio-tracer technique. Significantly enhanced interfacial diffusivity was detected in the UFL Ni in comparison with coarse-grained Ni. Analyses indicated that diffusion along LAGBs in the UFL sample is unexpectedly faster than the typical diffusion rates along conventional grain boundaries in the coarse-grained sample. This behavior is explained by the interaction of LAGBs with numerous extrinsic dislocations, as revealed by high-resolution transmission electron microscopy.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/3d535d2683dd42ba8f882256107b5f34 Zobrazit plný text záznamu View record in DOAJ