The Hall–Petch relation in aluminium and its dependence on the grain boundary structure
- 1 April 1986
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 53 (4) , 505-520
- https://doi.org/10.1080/01418618608242849
Abstract
Mechanical properties of aluminium polycrystals exhibiting differences in grain boundary (GB) properties have been studied by means of the Hall-Petch analysis. The results obtained indicate that the value of the stress intensity coefficient k depends on the distribution of GB diffusivity. High values of the diffusion coefficients favour relaxation processes on GBs, which means lower boundary rigidity and a decrease in the value of the parameter k. Within the range of room temperatures the rigidity of GBs in aluminium is strongly dependent on temperature. On the other hand, friction stress [sgrave]o depends on the value of the orientation factor m. It is concluded that considerable scatter of experimental results obtained by different authors studying the Hall–Petch relation in Al at room temperatures is most probably caused by the fact that the tested groups of polycrystals differed both in texture ([sgrave]o) and in distribution of GB diffusivity (k).Keywords
This publication has 15 references indexed in Scilit:
- Energy storage during the tensile deformation of Armco iron and austenitic steelMaterials Science and Engineering, 1985
- On slip-induced intergranular cavitation during low-cycle fatigue of nickel at intermediate temperatureActa Metallurgica, 1984
- In situ investigation of the early stages of plastic deformation in an austenitic stainless steelActa Metallurgica, 1984
- The plastic deformation of polycrystals I. Aluminium between room temperature and 400°CPhilosophical Magazine A, 1983
- Correlations for diffusion constantsActa Metallurgica, 1980
- On material purity influence on the spreading temperature of grain boundary dislocationsScripta Metallurgica, 1979
- The effect of grain size and strain on the tensile flow stress of aluminium at room temperatureActa Metallurgica, 1977
- The effect of grain size and deformation sub-structure on mechanical properties of polycrystalline aluminumActa Metallurgica, 1973
- The flow stress of polycrystalline aluminiumPhilosophical Magazine, 1957
- The Deformation and Ageing of Mild Steel: III Discussion of ResultsProceedings of the Physical Society. Section B, 1951