Title :
Reverse Hall-Petch Relationship of Metals in Nanometer Size
Author :
Zhao, M. ; Jiang, Q.
Author_Institution :
The Key Laboratory of Automobile Materials ofMinistry of Education and Department of Materials Science and Engineering, Jilin University, Changchun 130025, P. R. China.
Abstract :
The effect of melting temperature on Hall-Petch relationship has been studied. As grain size decreases, the melting temperature of the nano-structured crystals decreases, the Hall-Petch relationship is no longer sufficient. When the yield strength or hardness is taken as a function of reciprocal of the square root of the grain size, it has a numerical maximum whose location depends on the size of the bulk melting enthalpy of the crystals. Experimental results agree well with the modification induced by the size-dependence.
Keywords :
Crystalline materials; Entropy; Equations; Grain boundaries; Grain size; Inorganic materials; Laboratories; Materials science and technology; Predictive models; Temperature;
Conference_Titel :
Emerging Technologies - Nanoelectronics, 2006 IEEE Conference on
Print_ISBN :
0-7803-9357-0
DOI :
10.1109/NANOEL.2006.1609774
