HRTEM observation of alpha-phase in Al added 60/40 Cu-Zn alloy

Akihiro Maeda, Kenji Matsuda, Junya Nakamura, Tokimasa Kawabata, Susumu Ikeno, Yasuhiro Uetani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationTHERMEC 2011 Supplement
Pages586-589
Number of pages4
DOIs
Publication statusPublished - 2012
Event7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 - Quebec City, QC, Canada
Duration: 2011 Aug 12011 Aug 5

Publication series

NameAdvanced Materials Research
Volume409
ISSN (Print)1022-6680

Other

Other7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011
CountryCanada
CityQuebec City, QC
Period11/8/111/8/5

Keywords

  • Cu-Zn
  • Phase decomposition
  • TEM

ASJC Scopus subject areas

  • Engineering(all)

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