On the inverse Hall-Fetch relationship in nanocrystalline materials

Authors
Chattopadhyay, PP Pabi, SK Manna, I
Citation
Pp. Chattopadhyay et al., On the inverse Hall-Fetch relationship in nanocrystalline materials, Z METALLKUN, 91(12), 2000, pp. 1049-1051
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science",Metallurgy
Journal title
ZEITSCHRIFT FUR METALLKUNDE
ISSN journal
00443093 → ACNP
Volume
91
Issue
12
Year of publication
2000
Pages
1049 - 1051
Database
ISI
SICI code
0044-3093(200012)91:12<1049:OTIHRI>2.0.ZU;2-C
Abstract
This study concerns a theoretical investigation based on the isothermal equ ation of state to explain the inverse Hall-Petch relationship and theoretic al limit of mechanical stability of grain boundaries in the nanocrystalline metals. It is suggested that the excess free volume of the grain boundary atoms may induce a softening effect and account for the above mentioned phe nomena below a critical grain size.