Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy

H. Y. Song; Q. S. Zhu; Z. G. Wang; J. K. Shang; M. Lu

doi:10.1016/j.msea.2009.10.048

Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy

H. Y. Song, Q. S. Zhu, Z. G. Wang, J. K. Shang, M. Lu

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

Abstract

Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy were investigated. It was found that after the Zn addition, the Cu₆Sn₅ and Ag₃Sn phases were gradually replaced by the Cu₅Zn₈, Ag₅Zn₈ and AgZn₃ phases and the amount of them were increased with increasing Zn content. The tensile tests showed that while the elongation of the alloy decreased with increasing Zn content, the strength was increased by Zn additions for Zn content <1 wt.%, but decreased at Zn content of 2 wt.%. The fracture surface analysis and deformed surface observation demonstrated that the fracture of the Sn-1Ag-0.5Cu-2Zn alloy was originated at the Ag₅Zn₈ phase. TEM observation further confirmed that the Ag₅Zn₈ phase was the weakness of the microstructure, accounting for the combination of the worst strength and elongation of the Sn-1Ag-0.5Cu-2Zn alloy.

Original language	English (US)
Pages (from-to)	1343-1350
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	527
Issue number	6
DOIs	https://doi.org/10.1016/j.msea.2009.10.048
State	Published - Mar 15 2010
Externally published	Yes

Keywords

Intermetallic compound
Lead-free solder
Sn-Ag-Cu alloy
Tensile property
Zn addition

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Online availability

10.1016/j.msea.2009.10.048

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title = "Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy",

abstract = "Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy were investigated. It was found that after the Zn addition, the Cu6Sn5 and Ag3Sn phases were gradually replaced by the Cu5Zn8, Ag5Zn8 and AgZn3 phases and the amount of them were increased with increasing Zn content. The tensile tests showed that while the elongation of the alloy decreased with increasing Zn content, the strength was increased by Zn additions for Zn content <1 wt.%, but decreased at Zn content of 2 wt.%. The fracture surface analysis and deformed surface observation demonstrated that the fracture of the Sn-1Ag-0.5Cu-2Zn alloy was originated at the Ag5Zn8 phase. TEM observation further confirmed that the Ag5Zn8 phase was the weakness of the microstructure, accounting for the combination of the worst strength and elongation of the Sn-1Ag-0.5Cu-2Zn alloy.",

keywords = "Intermetallic compound, Lead-free solder, Sn-Ag-Cu alloy, Tensile property, Zn addition",

author = "Song, {H. Y.} and Zhu, {Q. S.} and Wang, {Z. G.} and Shang, {J. K.} and M. Lu",

year = "2010",

month = mar,

day = "15",

doi = "10.1016/j.msea.2009.10.048",

language = "English (US)",

volume = "527",

pages = "1343--1350",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

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number = "6",

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TY - JOUR

T1 - Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy

AU - Song, H. Y.

AU - Zhu, Q. S.

AU - Wang, Z. G.

AU - Shang, J. K.

AU - Lu, M.

PY - 2010/3/15

Y1 - 2010/3/15

N2 - Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy were investigated. It was found that after the Zn addition, the Cu6Sn5 and Ag3Sn phases were gradually replaced by the Cu5Zn8, Ag5Zn8 and AgZn3 phases and the amount of them were increased with increasing Zn content. The tensile tests showed that while the elongation of the alloy decreased with increasing Zn content, the strength was increased by Zn additions for Zn content <1 wt.%, but decreased at Zn content of 2 wt.%. The fracture surface analysis and deformed surface observation demonstrated that the fracture of the Sn-1Ag-0.5Cu-2Zn alloy was originated at the Ag5Zn8 phase. TEM observation further confirmed that the Ag5Zn8 phase was the weakness of the microstructure, accounting for the combination of the worst strength and elongation of the Sn-1Ag-0.5Cu-2Zn alloy.

AB - Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy were investigated. It was found that after the Zn addition, the Cu6Sn5 and Ag3Sn phases were gradually replaced by the Cu5Zn8, Ag5Zn8 and AgZn3 phases and the amount of them were increased with increasing Zn content. The tensile tests showed that while the elongation of the alloy decreased with increasing Zn content, the strength was increased by Zn additions for Zn content <1 wt.%, but decreased at Zn content of 2 wt.%. The fracture surface analysis and deformed surface observation demonstrated that the fracture of the Sn-1Ag-0.5Cu-2Zn alloy was originated at the Ag5Zn8 phase. TEM observation further confirmed that the Ag5Zn8 phase was the weakness of the microstructure, accounting for the combination of the worst strength and elongation of the Sn-1Ag-0.5Cu-2Zn alloy.

KW - Intermetallic compound

KW - Lead-free solder

KW - Sn-Ag-Cu alloy

KW - Tensile property

KW - Zn addition

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Effects of Zn addition on microstructure and tensile properties of Sn-1Ag-0.5Cu alloy

Abstract

Keywords

ASJC Scopus subject areas

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