Evolution in microstructure and mechanical properties of Cu alloy during wire and arc additive manufacture

Zhang, Qingke; Yang, Jie; Sun, Wei; Song, Zhenlun

doi:10.1007/s11771-022-5197-0

Cited by 6 publications

(1 citation statement)

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“…This method is characterized by the increased penetration of the weld material into the base material. In references [ 16 , 17 , 18 , 19 , 20 , 21 , 22 ], the authors discuss the use of welding methods in 3D printing. The presented WAAM (Wire Arc Additive Manufacturing) method is characterized by the high accuracy of the manufactured elements [ 17 ] compared to classic castings; moreover, it significantly affects the modification of the macro and microstructure [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Properties of Padding Welds Made of CuAl2 Multiwire and CuAl7 Wire in TIG Process

Kalabis,

Kowalski,

Topolska

2023

Materials

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This paper presents the influence of the Hot Isostatic Pressing (HIP) process on the structure, mechanical properties and corrosion resistance of padding welds made using the TIG method from aluminium bronzes—CuAl7 and CuAl2 (a composite bundled wire). The tested CuAl7 material was a commercial welding wire, while the CuAl2 composite was an experimental one (a prototype of the material produced in multiwire technology). The wire contains a bundle of component materials—in this case, copper in the form of a tube and aluminium in the form of rods. The padding welds were manufactured for both the CuAl7 wire and the CuAl2 multiwire. The prepared samples were subjected to the Hot Isostatic Pressing (HIP) process, chemical composition tests were performed, and then the samples were subjected to observations using light microscopy, Vickers hardness testing, electrical conductivity tests, and apparent density determination using Archimedes’ Principle. Tribological tests (the ‘pin on disc’ method) and neutral salt spray corrosion tests were conducted. The padding weld made of CuAl2 multifiber material subjected to the HIP process is characterized by an improvement in density of 0.01 g/cm3; a homogenization of the hardness results across the sample was also observed. The average hardness of the sample after the HIP process decreased by about 15HV, however, the standard deviation also decreased by about 8HV. The electrical conductivity of the CuAl2 welded sample increased from 16.35 MS/m to 17.49 MS/m for the CuAl2 sample after the HIP process. As a result of this process, a visible increase in electrical conductivity was observed in the case of the wall made of the CuAl2 multiwire—an increase of 1.14 MS/m.

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