TY - GEN
T1 - Transmission electron microscopy observations on Cu-Mg alloy systems
AU - Nishikawa, Ken Ichi
AU - Semboshi, Satoshi
AU - Konno, Toyohiko J.
N1 - Publisher Copyright:
© (2007) Trans Tech Publications, Switzerland.
PY - 2007
Y1 - 2007
N2 - Environmentally friendly Cu-based alloys with high strength and low electrical resistivity have been much sought in order to replace deleterious Cu-Be alloys for electrical applications. As one of the candidate systems, we have examined age-hardening behaviors of Cu-Mg alloys by using transmission electron microscopy (TEM). Cu-2.26wt.%Mg alloys were solution-treated and annealed at 723K, and their structural changes have been investigated. The Vickers hardness measurements showed that they aged-harden gradually. Our TEM observations showed that annealing for 6h brings about precipitation of numerous needle-like particles of 10 nm in length. The diffraction studies indicated these precipitates consist of the Cu2Mg phase with {111}Cu habit planes. When annealed for 96h, these precipitates become semi-coherent, which was manifested by moiré fringes; while maintaining the orientation relationship of (111)Cu//(111)Cu2Mg, [110]Cu//[110]Cu2Mg.
AB - Environmentally friendly Cu-based alloys with high strength and low electrical resistivity have been much sought in order to replace deleterious Cu-Be alloys for electrical applications. As one of the candidate systems, we have examined age-hardening behaviors of Cu-Mg alloys by using transmission electron microscopy (TEM). Cu-2.26wt.%Mg alloys were solution-treated and annealed at 723K, and their structural changes have been investigated. The Vickers hardness measurements showed that they aged-harden gradually. Our TEM observations showed that annealing for 6h brings about precipitation of numerous needle-like particles of 10 nm in length. The diffraction studies indicated these precipitates consist of the Cu2Mg phase with {111}Cu habit planes. When annealed for 96h, these precipitates become semi-coherent, which was manifested by moiré fringes; while maintaining the orientation relationship of (111)Cu//(111)Cu2Mg, [110]Cu//[110]Cu2Mg.
KW - Age-hardening
KW - Cu-Mg alloy
KW - Laves phase
KW - Precipitation
UR - http://www.scopus.com/inward/record.url?scp=84954239093&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84954239093&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/SSP.127.103
DO - 10.4028/www.scientific.net/SSP.127.103
M3 - Conference contribution
AN - SCOPUS:84954239093
SN - 9783908451334
T3 - Solid State Phenomena
SP - 103
EP - 108
BT - Designing of Interfacial Structures in Advanced Materials and their Joints
A2 - Naka, Masaaki
PB - Trans Tech Publications Ltd
T2 - International Workshop on Designing of Interfacial Structures in Advanced Materials and their Joints, DIS 2006
Y2 - 18 May 2006 through 20 May 2006
ER -