TY - GEN
T1 - HRTEM observation of alpha-phase in Al added 60/40 Cu-Zn alloy
AU - Maeda, Akihiro
AU - Matsuda, Kenji
AU - Nakamura, Junya
AU - Kawabata, Tokimasa
AU - Ikeno, Susumu
AU - Uetani, Yasuhiro
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - The effect of Al-addition on the mechanism of phase decomposition from β1 to α-phase in Cu-40at.%Zn alloy (base alloy) has been investigated using hardness measurement and HRTEM observation. The peak hardness during annealing and the number density of α-phase in Al-bearing alloy were the same as those in the base alloy. Many striations which have been considered as the periodicity of 9R structure were observed in the α-phase of the Al-bearing alloy. There were a lot of striations in the α-phase at the early annealing time, and the number of these striations decreased with increasing annealing time. The rate of decreasing of this striation in the α-phase of the Al-bearing alloy was the slower than that of the base alloy. According to the analysis of the selected area electron diffraction (SAED) patterns obtained for these α-phase in those alloys, transition time from the 9R structure to fcc structure t(9R-fcc) of has been detected by the changing of angles in SAED patterns. The t(9R-fcc) of α-phase in the Al-bearing alloy showed the slower than the base alloy.
AB - The effect of Al-addition on the mechanism of phase decomposition from β1 to α-phase in Cu-40at.%Zn alloy (base alloy) has been investigated using hardness measurement and HRTEM observation. The peak hardness during annealing and the number density of α-phase in Al-bearing alloy were the same as those in the base alloy. Many striations which have been considered as the periodicity of 9R structure were observed in the α-phase of the Al-bearing alloy. There were a lot of striations in the α-phase at the early annealing time, and the number of these striations decreased with increasing annealing time. The rate of decreasing of this striation in the α-phase of the Al-bearing alloy was the slower than that of the base alloy. According to the analysis of the selected area electron diffraction (SAED) patterns obtained for these α-phase in those alloys, transition time from the 9R structure to fcc structure t(9R-fcc) of has been detected by the changing of angles in SAED patterns. The t(9R-fcc) of α-phase in the Al-bearing alloy showed the slower than the base alloy.
KW - Cu-Zn
KW - Phase decomposition
KW - TEM
UR - http://www.scopus.com/inward/record.url?scp=84855214909&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855214909&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.409.586
DO - 10.4028/www.scientific.net/AMR.409.586
M3 - Conference contribution
AN - SCOPUS:84855214909
SN - 9783037853047
T3 - Advanced Materials Research
SP - 586
EP - 589
BT - THERMEC 2011 Supplement
T2 - 7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
Y2 - 1 August 2011 through 5 August 2011
ER -