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Title: Discontinuity of G.P.(I) zone and {theta}{double_prime}-phase in an Al-Cu alloy

Abstract

Al-Cu is a precipitation-hardening Al-base alloy with several metastable phases formed in its phase-decomposition process. It is widely accepted that the phase decomposition in the Al-Cu alloy is as follows: supersaturated solid solution {r_arrow} G.P.(I) {r_arrow} {theta}{double_prime}-phase {r_arrow} metastable {theta}{prime}-phase {r_arrow} stable {theta}-phase. Based on this model, valuable information has been obtained through experiments since studies on the Al-Cu alloy began. The present work aimed at examining the thermal stabilities of G.P.(I) and {theta}{double_prime} in order to determine the relation between these precipitates by taking the copper concentration into account. To consider the precipitation behavior in an Al-Cu alloy, differential scanning calorimetry (DSC), TEM observations and Vickers hardness tests were used in combination in this work.

Authors:
; ; ;  [1]; ;  [2]
  1. Yokohama National Univ. (Japan). Dept. of Mechanical Engineering and Materials Science
  2. Kanangawa High-Technology Foundation, Takatsuku, Kawasaki (Japan). Material Characterization Lab.
Publication Date:
OSTI Identifier:
691322
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 41; Journal Issue: 6; Other Information: PBD: 20 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MICROSTRUCTURE; ALUMINIUM ALLOYS; COPPER ALLOYS; PRECIPITATION; CONCENTRATION RATIO; CALORIMETRY; HARDNESS; MICROSCOPY

Citation Formats

Takeda, M., Maeda, Y., Yoshida, A., Endo, T., Yabuta, K., and Konuma, S. Discontinuity of G.P.(I) zone and {theta}{double_prime}-phase in an Al-Cu alloy. United States: N. p., 1999. Web. doi:10.1016/S1359-6462(99)00137-2.
Takeda, M., Maeda, Y., Yoshida, A., Endo, T., Yabuta, K., & Konuma, S. Discontinuity of G.P.(I) zone and {theta}{double_prime}-phase in an Al-Cu alloy. United States. doi:10.1016/S1359-6462(99)00137-2.
Takeda, M., Maeda, Y., Yoshida, A., Endo, T., Yabuta, K., and Konuma, S. Fri . "Discontinuity of G.P.(I) zone and {theta}{double_prime}-phase in an Al-Cu alloy". United States. doi:10.1016/S1359-6462(99)00137-2.
@article{osti_691322,
title = {Discontinuity of G.P.(I) zone and {theta}{double_prime}-phase in an Al-Cu alloy},
author = {Takeda, M. and Maeda, Y. and Yoshida, A. and Endo, T. and Yabuta, K. and Konuma, S.},
abstractNote = {Al-Cu is a precipitation-hardening Al-base alloy with several metastable phases formed in its phase-decomposition process. It is widely accepted that the phase decomposition in the Al-Cu alloy is as follows: supersaturated solid solution {r_arrow} G.P.(I) {r_arrow} {theta}{double_prime}-phase {r_arrow} metastable {theta}{prime}-phase {r_arrow} stable {theta}-phase. Based on this model, valuable information has been obtained through experiments since studies on the Al-Cu alloy began. The present work aimed at examining the thermal stabilities of G.P.(I) and {theta}{double_prime} in order to determine the relation between these precipitates by taking the copper concentration into account. To consider the precipitation behavior in an Al-Cu alloy, differential scanning calorimetry (DSC), TEM observations and Vickers hardness tests were used in combination in this work.},
doi = {10.1016/S1359-6462(99)00137-2},
journal = {Scripta Materialia},
number = 6,
volume = 41,
place = {United States},
year = {1999},
month = {8}
}