Microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by multi-wire arc-based directed energy deposition

被引：18

作者：

Wang, Liwei ^{[1
,2
]}

Tan, Zhen ^{[1
]}

Chen, Shaohui ^{[3
]}

Zeng, Zhi ^{[4
]}

Teshome, F. B. ^{[4
]}

Yan, Huan ^{[1
]}

Liu, Ying ^{[1
,2
]}

Peng, Zhenzhen ^{[1
,2
]}

Yang, Xiao ^{[1
,2
]}

Wang, Dianlong ^{[5
]}

Narayanaswamy, Balaji ^{[6
]}

Liang, Zhimin ^{[1
,2
]}

Oliveira, Joao Pedro ^{[7
]}

机构：

[1] Hebei Univ Sci & Technol, Sch Mat Sci & Engn, Shijiazhuang, Peoples R China

[2] Hebei Key Lab Mat Near Net Forming Technol, Shijiazhuang, Peoples R China

[3] Beijing Aeronaut Technol Res Ctr, Beijing, Peoples R China

[4] Univ Elect Sci & Technol, Sch Mech & Elect Engn, Chengdu, Peoples R China

[5] Yanshan Univ, Sch Mech Engn, Qinhuangdao, Peoples R China

[6] Univ Sydney, Educ, Camperdown, NSW 2006, Australia

[7] NOVA Univ Lisbon, Sch Sci & Technol, Dept Mat Sci, CENIMAT i3N, P-2829516 Caparica, Portugal

来源：

JOURNAL OF MANUFACTURING PROCESSES | 2024年 / 124卷

基金：

中国国家自然科学基金;

关键词：

Wire-arc directed energy deposition; In-situ alloying; Al-Zn-Mg-Cu alloy; Microstructure; Mechanical property; ALUMINUM-ALLOYS; WIRE; TRANSITION;

D O I：

10.1016/j.jmapro.2024.06.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ER5356, ER2319 and Zn wires were synchronously fed using a multi-wire gas metal arc directed energy deposition (DED) system. This allowed the successfully fabrication of Al-6.0Zn-2.5Mg-1.5Cu alloy. The microstructure and mechanical properties of the fabricated parts were studied. It is shown that the main precipitated phases are eta and nanoscale eta ' . The upper and lower parts of the deposited parts are composed by coarse equiaxed grains and columnar dendrite structures, respectively. The average microhardness of the fabricated alloy was 118.5 HV. The ultimate tensile strength and elongations in the perpendicular to the building direction (BD) and parallel to the BD were 267 MPa and 2.7 %, 238 MPa and 2.3 %, respectively. The average tensile strength is higher than that of 7075-O alloy. The fracture mode of the samples composed brittle and ductile features, although the former dominated. This multi-wire arc DED approach provides a new choice for the in-situ synthesis of Al -Zn -Mg -Cu alloys.

引用

页码：661 / 672

页数：12

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