Research on aging precipitation in a Cu-Cr-Zr-Mg alloy

Juan Hua Su; Qi Ming Dong; Ping Liu; He Jun Li; Bu Xi Kang

doi:10.1016/j.msea.2004.09.041

Research on aging precipitation in a Cu-Cr-Zr-Mg alloy

Juan Hua Su, Qi Ming Dong, Ping Liu, He Jun Li, Bu Xi Kang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

166 Scopus citations

Abstract

The effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy were investigated. Aging precipitation phase was dealt with by transmission electronic microscope (TEM). After solid solution was treated at 920 °C and aged at 470 °C for 4 h, the fine precipitation of an ordered compound CrCu₂(Zr, Mg) is found in copper matrix as well as fine Cr and Cu₄Zr. Along the grain boundary, there are larger chromium. The hardness and electrical conductivity can reach 109 HV and 80% IACS, respectively. Sixty percent cold-rolled deformation prior to aging at 470 °C enhances the hardness of the alloy. The coherent precipitates Cr in copper matrix and the dislocations pinned by the fine precipitates are responsible for maximum strengthening of the alloy. So the hardness 165 HV and electrical conductivity 79.2% IACS are available.

Original language	English
Pages (from-to)	422-426
Number of pages	5
Journal	Materials Science and Engineering: A
Volume	392
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2004.09.041
State	Published - 15 Feb 2005

Keywords

Aging
Coherency
Cu-Cr-Zr-Mg alloy
Precipitation phase
Properties

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10.1016/j.msea.2004.09.041

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title = "Research on aging precipitation in a Cu-Cr-Zr-Mg alloy",

abstract = "The effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy were investigated. Aging precipitation phase was dealt with by transmission electronic microscope (TEM). After solid solution was treated at 920 °C and aged at 470 °C for 4 h, the fine precipitation of an ordered compound CrCu2(Zr, Mg) is found in copper matrix as well as fine Cr and Cu4Zr. Along the grain boundary, there are larger chromium. The hardness and electrical conductivity can reach 109 HV and 80% IACS, respectively. Sixty percent cold-rolled deformation prior to aging at 470 °C enhances the hardness of the alloy. The coherent precipitates Cr in copper matrix and the dislocations pinned by the fine precipitates are responsible for maximum strengthening of the alloy. So the hardness 165 HV and electrical conductivity 79.2% IACS are available.",

keywords = "Aging, Coherency, Cu-Cr-Zr-Mg alloy, Precipitation phase, Properties",

author = "Su, {Juan Hua} and Dong, {Qi Ming} and Ping Liu and Li, {He Jun} and Kang, {Bu Xi}",

year = "2005",

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T1 - Research on aging precipitation in a Cu-Cr-Zr-Mg alloy

AU - Su, Juan Hua

AU - Dong, Qi Ming

AU - Liu, Ping

AU - Li, He Jun

AU - Kang, Bu Xi

PY - 2005/2/15

Y1 - 2005/2/15

N2 - The effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy were investigated. Aging precipitation phase was dealt with by transmission electronic microscope (TEM). After solid solution was treated at 920 °C and aged at 470 °C for 4 h, the fine precipitation of an ordered compound CrCu2(Zr, Mg) is found in copper matrix as well as fine Cr and Cu4Zr. Along the grain boundary, there are larger chromium. The hardness and electrical conductivity can reach 109 HV and 80% IACS, respectively. Sixty percent cold-rolled deformation prior to aging at 470 °C enhances the hardness of the alloy. The coherent precipitates Cr in copper matrix and the dislocations pinned by the fine precipitates are responsible for maximum strengthening of the alloy. So the hardness 165 HV and electrical conductivity 79.2% IACS are available.

AB - The effects of aging processes on the properties and microstructure of Cu-0.3Cr-0.15Zr-0.05Mg lead frame alloy were investigated. Aging precipitation phase was dealt with by transmission electronic microscope (TEM). After solid solution was treated at 920 °C and aged at 470 °C for 4 h, the fine precipitation of an ordered compound CrCu2(Zr, Mg) is found in copper matrix as well as fine Cr and Cu4Zr. Along the grain boundary, there are larger chromium. The hardness and electrical conductivity can reach 109 HV and 80% IACS, respectively. Sixty percent cold-rolled deformation prior to aging at 470 °C enhances the hardness of the alloy. The coherent precipitates Cr in copper matrix and the dislocations pinned by the fine precipitates are responsible for maximum strengthening of the alloy. So the hardness 165 HV and electrical conductivity 79.2% IACS are available.

KW - Aging

KW - Coherency

KW - Cu-Cr-Zr-Mg alloy

KW - Precipitation phase

KW - Properties

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U2 - 10.1016/j.msea.2004.09.041

DO - 10.1016/j.msea.2004.09.041

M3 - 文章

AN - SCOPUS:13244269852

SN - 0921-5093

VL - 392

SP - 422

EP - 426

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2

ER -

Research on aging precipitation in a Cu-Cr-Zr-Mg alloy

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Keywords

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