@article{oai:air.repo.nii.ac.jp:00001309,
 author = {武藤, 侃 and 後藤, 正治 and 加藤, 千秋 and 田上, 道弘 and MUTO, Akira and GOTO, Shoji and KATO, Chiaki and TAGAMI, Michihiro},
 issue = {1/2},
 journal = {素材物性学雑誌},
 month = {Dec},
 note = {Cu-30mass%Zn alloys with various grain sizes were tensile tested under vanous strain
rates from 3.3xlO-5 S·l to 3.3x10-3 S-l and at temperatures from 523K to 773K. Elongation to
fracture for fine-grained specimens shows high ductility and a maximum value in a range of
intermediate temperature. The peak ductility increases with increasing in strain rate though it
does not depend on the initial grain size. Type of the flow curves is controlled by the factors of
temperature, strain rate and initial grain size. The flow curve of coase-grained specimens shows
a serrated flow at lower temperatures and at higher strain rates while shows the work softening
processes at other conditions. The flow curve of fine-grained specimens shows a typical flow
behavior of dynamic recrystallization. It should be noted that these flow curves tend to change
from a type having simple peak due to dynamic recrystallization to another type having multiple
peaks with decreasing initial grain size and strain rate and/or with increasing temperature.
The values of stress exponent and apparent activation energy for deformation range from 3 to
5 and from 120 to 135kJ/mol, respectively. The main reason for this can be explained by a fact
that the both mechanisms of dislocation glide and grain boundary sliding occur simultaneously.},
 pages = {35--42},
 title = {Cu-30mass%Zn合金の高温延性に及ぼす結晶粒径とひずみ速度の影響},
 volume = {14},
 year = {2001}
}