σ 0 + k/D for a single grain in a polycrystal a stochastic theory for the relation between the grain size distribution (also considering elements like structure, shape and orientation of the grains, boundary structure, pinning effect) in a specimen and its yield strength has been developped....
The results show that the relationship between grain size and yield strength is obviously different for forged and ECAP steels,the mode of plastic deformation has great influence on Hall-Petch relation. 研究结果表明,完全再结晶退火后,经锻造、等径角挤压变形得到的晶粒尺寸与屈服强度的关系有明显的差异...
The initial martensite packets control the high-angle boundary grain structure after normal tempering, thus contributing to the yield strength through an ordinary Petch-Hall relation for the packet size. The Petch-Hall coefficient for packets seems to decrease on tempering if extensive recovery and ...
Many studies have been carried out in regard to the grain size dependence of fatigue strength of metals. And it has been made clear that fatigue strength of f. c. c. metals greatly depends on the stacking fault energy γ, and the effect of γ on the crack propagation process is different...
Greater differences in starch accumulation and grain weight were found between the two classes of grains for compact-spike cultivars than between those for loose-spike cultivars. These results suggest that the grain sink strength, determined by endosperm cell number and the activity of synthesis-...
second phase particles, are selected as representative materials, respectively. The special effort aims to build a quantitative relation between yield strength and grain structure with a bimodal size distribution, which provides valuable insights to design and produce high-strength bimodal-grained Mg ...
yield strength yield stress/ Hall-Petch relation nanocrystalline solids yield strength grain size hardness Pd Cu/ A8140N Fatigue, embrittlement, and fracture A8140L Deformation, plasticity and creep A6220F Deformation and plasticity A6220M Fatigue, brittleness, fracture, and cracks / Pd/el Cu/el ...
There are less differences in crystalline grain size and crystallinity of mature cotton fiber between different cotton species and varieties of cotton. And they have not significant correlation with fiber strength. But the orientational parameter has contrary results. There are different super-molecular ...
Conclusions (1) The order of the strength of relationships between densities of histologic markers and dementia severity in AD is neurofibrillary tangles greater than cored senile plaques greater than total senile plaques. (2) Advanced age at death is associated with somewhat less severe dementia and...
where: σy = is the yield strength σ0 = 25 MPa is the internal friction stress ky = 12.5 MPa·mm1/2 is a material constant d = is the average grain size... Dave_ Thread Jul 5, 2014 Tags Calculation Relation Replies: 1 Forum: Introductory Physics Homework Help...