Effects of Electron Beam Welding on Microstructure, Microhardness, and Electrical Conductivity of Cu-Cr-Zr Alloy Plates

Kanigalpula, P. K. C.; Chatterjee, A. K.; Pratihar, Dilip Kumar; Jha, M. N.; DeRose, James

doi:10.1007/s11665-015-1790-9

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…Feng et al [12] observed the appearance of residual stress and impurities introduced by the flash butt welding process, which thus caused the decrease of the electrical conductivity. Kanigalpula et al [13] revealed the presence of voids and cracks in the microstructure of the investigated alloys after electron beam welding. Therefore, the fusion welding, such as the flash butt welding and the electron beam welding, are considered as an unattractive method for the welding of the CuCrZr alloy.…”

Section: Introductionmentioning

confidence: 97%

Study of the Microstructure Evolution and Properties Response of a Friction-Stir-Welded Copper-Chromium-Zirconium Alloy

Lai

et al. 2017

Metals

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Abstract:In this article, the copper-chromium-zirconium (CuCrZr) alloys plates with 21 mm in thickness were butt joined together by means of FSW (friction stir welding). The properties of the FSW joints are studied. The microstructure variations during the process of FSW were investigated by optical microscopy (OM), electron back-scattered diffraction (EBSD), and transmission electron microscopy (TEM). The results show that the grains size in the nugget zone (NZ) are significantly refined, which can be attributed to the dynamic recrystallization (DRX). The microstructure distribution in the NZ is inhomogeneous and the size of equiaxed grains are decreased gradually along the thickness direction from the top to bottom area of the welds. Meanwhile, it is found that the micro-hardness and tensile strength of the welds are slightly increased along the thickness direction from the top to the bottom area of the welds. All the nano-strengthening precipitates in the BM are dissolved into the Cu matrix in the NZ. Therefore, the decreases in hardness, tensile strength, and electrical conductivity can be attributed to the comprehensive effect of dissolution of nano-strengthening precipitates into the supersaturation matrix and severe DRX in the welded NZ.

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Section: Introductionmentioning

confidence: 97%

Study of the Microstructure Evolution and Properties Response of a Friction-Stir-Welded Copper-Chromium-Zirconium Alloy

Lai

et al. 2017

Metals

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“…Even if the welding defects were eliminated, it is still a big challenge to keep the good mechanical properties and conductivity of the base material (BM). Because Cu–Cr–Zr alloy is a highly conductive material, it needs very high heat input to get full penetration joints in fusion welding methods, resulting in severe grain coarsening, and dissolution/coarsening of the precipitates in the NZ and heat affected zone (HAZ) [7, 8]. Obviously, the NZ and HAZ are distinct softening zones with poor mechanical properties and electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…The industrial application of Cu-Cr-Zr alloy unavoidably involves the welding and joining processes. However, voids and hot cracks were easily formed in the nugget zone (NZ) when adopting the fusion welding techniques [5][6][7]. Even if the welding defects were eliminated, it is still a big challenge to keep the good mechanical properties and conductivity of the base material (BM).…”

Section: Introductionmentioning

confidence: 99%

Realising equal-strength welding with good conductivity in Cu–Cr–Zr alloy via friction stir welding

Wang

Zhu

Xie

et al. 2021

Science and Technology of Welding and Joining

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Realising high-quality welding of the peak aged Cu-Cr-Zr alloy has always been a big challenge. Under a low rotation rate of 400 rev min −1 , equiaxed ultrafine grains together with nanoscale precipitates with comparable size to that of the peak aged state were obtained in the nugget zone of the friction stir welded joint. Further, the initial strengthened precipitates were also preserved near the nugget zone, neither dissolved nor coarsened. Therefore, softening zone disappeared and a high-quality weld with equal strength to the base material was first achieved. Furthermore, the electrical conductivity of the joint was hardly weakened. This study provides an effective method to improve the strength and electrical conductivity of the precipitation-hardened Cu alloy joints.

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Effect of Post-Weld Heat Treatment on the Microstructure and Mechanical Properties of Friction Stir Welds of Cu–Cr–Zr–Ti Alloy

Krishna

Karthick

Karthik

et al. 2018

Metallogr. Microstruct. Anal.

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Effects of Electron Beam Welding on Microstructure, Microhardness, and Electrical Conductivity of Cu-Cr-Zr Alloy Plates

Cited by 9 publications

References 25 publications

Study of the Microstructure Evolution and Properties Response of a Friction-Stir-Welded Copper-Chromium-Zirconium Alloy

Study of the Microstructure Evolution and Properties Response of a Friction-Stir-Welded Copper-Chromium-Zirconium Alloy

Realising equal-strength welding with good conductivity in Cu–Cr–Zr alloy via friction stir welding

Effect of Post-Weld Heat Treatment on the Microstructure and Mechanical Properties of Friction Stir Welds of Cu–Cr–Zr–Ti Alloy

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