反常Hall-Petch 效应中的至硬粒度尺寸
he strongest size in the inverse Hall-Petch relationship
Reproduction of the measured inverse Hall-Petch relation (IHPR) using the currently presented analytical solution reveals that: (i) the size induced energy densitification and cohesive energy loss of nanograins originates the IHPR that could be activated in the contact mode of plastic deformation detection; (ii) the competition between the inhibition of atomic dislocations, via the surface energy density gain and the strain work hardening, and the activation for dislocations through cohesive energy loss determine the entire IHPR profile of a specimen; (iii) the presence of a soft quasisolid phase is responsible for the size-induced softening and the superplasticity as well of nanostructures; (iv) the bond nature involved and the T/Tm ratio between the temperature of operating and the temperature of melting dictate the measured strongest sizes of a given specimen.
Reproduction of the measured inverse Hall-Petch relation (IHPR) using the currently presented analytical solution reveals that: (i) the size induced energy densitification and cohesive energy loss of nanograins originates the IHPR that could be activated in the contact mode of plastic deformation detection; (ii) the competition between the inhibition of atomic dislocations, via the surface energy density gain and the strain work hardening, and the activation for dislocations through cohesive energy loss determine the entire IHPR profile of a specimen; (iii) the presence of a soft quasisolid phase is responsible for the size-induced softening and the superplasticity as well of nanostructures; (iv) the bond nature involved and the T/Tm ratio between the temperature of operating and the temperature of melting dictate the measured strongest sizes of a given specimen.
周宜春、潘勇、孙长庆
金属学、热处理冶金技术物理学
nanostructuresanalytical methodsplastic deformationHall-Petch relationshipthermally activated processes
nanostructuresanalytical methodsplastic deformationHall-Petch relationshipthermally activated processes
周宜春,潘勇,孙长庆.反常Hall-Petch 效应中的至硬粒度尺寸[EB/OL].(2007-10-10)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/200710-109.点此复制
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