Microstructure and Mechanical Properties of the Commercially Pure Copper Tube After Processing by Hydrostatic Tube Cyclic Expansion Extrusion (HTCEE)

Savarabadi, M. Motallebi; Faraji, Ghader; Eftekhari, Mohammad

doi:10.1007/s12540-019-00525-7

Cited by 12 publications

(3 citation statements)

References 52 publications

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“…Pure copper tubes are used in various kinds of heat-transfer units, such as air-conditioners, refrigerators, evaporators, electronic devices, and computers, due to their perfect heat dissipation capacity, good corrosion resistance, high relative strength, and formability. [1][2][3][4] Oxygen-free copper tube (OFC) is one of the representative pure copper tubes in the practical air-conditioning and refrigeration (ACR) industry. [5,6] With the progress of processing technology and the reduction of production costs, thin-walled OFC tubes are urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Effects of trace La addition on corrosion properties of oxygen‐free copper tube in a formic acid environment

Wang

et al. 2023

Materials & Corrosion

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Oxygen‐free copper (OFC) tubes are widely used in heat‐transfer units. Due to the thickness of the OFC tube wall becoming thinner and thinner, higher demands are put forward for its corrosion resistance properties. We investigated the effects of trace La addition on the corrosion properties of OFC tubes in a formic acid environment through experiments of vapor corrosion and electrochemical corrosion. Although a small number of La would exist on the grain boundaries of copper tubes, there was no apparent influence on the grain size of OFC tubes. In HCOOH vapor, La addition increased the compactness of corrosion product films, decreased the size of corrosion pits, and improved the corrosion properties of OFC tube. Furthermore, rare earth La purified copper matrix, decreased the cathode area of impurities and inhibited the cathode reaction. Electrochemical corrosion resistance properties of the OFC tube were improved by the addition of trace La.

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Section: Introductionmentioning

confidence: 99%

Effects of trace La addition on corrosion properties of oxygen‐free copper tube in a formic acid environment

Wang

et al. 2023

Materials & Corrosion

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“…In addition, grain refinement by SPD is another crucial factor in enhancing the kinetics because they act as a route for hydrogen atoms to diffuse into the structure of the material and thus, accelerate the kinetics of hydrogenation. Some of the newest techniques include Indirect Extrusion Angular Pressing (IEAP) [11,12], Hard Cyclic ViscoPlastic Deformation (HCVP) [13], High Pressure Torsion Extrusion (HPTE) [14,15], Hydrostatic Tube Cyclic Expansion Extrusion (HTCEE) [16], etc.…”

Section: Introductionmentioning

confidence: 99%

A Promising Approach to Solid-State Hydrogen Storage: Mechanical Nanostructuring Synthesis of Magnesium by High Pressure Torsion Extrusion

Shahreza,

Sergejev,

Ivanisenko

et al. 2023

Advances in Science and Technology

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This article presents an investigation into the impact of High Pressure Torsion Extrusion (HPTE) on the microstructural features, hardness and hydrogen storage, focusing on pure magnesium. HPTE is a modern mechanical nanostructuring technique that can refine the microstructural properties and subsequently affects the mechanical and functional properties of the materials. Two HPTE regimes were used in this study: (1) Direct Extrusion without rotation (DE), and (2) an extrusion speed of 6 mm/min along with a rotational speed of 1.8 rpm (v6w1.8). One sample in as-received conditions was also tested as a reference. Results showed increased hardness in the material after HPTE processing, with the DE sample reaching 60 HRB and the v6w1.8 sample exhibiting a gradient distribution of hardness from 71 to 83 HRB. X-ray diffraction analysis revealed significant microstructural refinement in the v6w1.8 sample. Results of hydrogenation kinetics showed that the DE sample absorbed up to 1.2 wt.% of hydrogen, while the v6w1.8 sample displayed 7.2 wt.% of hydrogen absorption, approaching the theoretical hydrogen storage capacity for magnesium (7.6 wt.%). These findings highlight the positive effects of HPTE on microstructural refinement and hydrogen storage, showcasing its potential for advancements in materials science and hydrogen-based energy technologies.

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“…Presently, few studies have considered hollow parts. Methods for steels [15], such as extrusion, rolling, and brazing [16], can also be applied as a hydrostatic forming method for copper [17]. These studies are mainly for tubes with a relatively small thickness and height.…”

Section: Introductionmentioning

confidence: 99%

IMPROVING THE MECHANICAL PROPERTIES OF Al-Cu-Mg-Mn ALLOY TUBES THROUGH PLASTIC DEFORMATION

Le¹,

Dac

Bui

2021

Acta Metall Slovaca

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The effect of plastic deformation upon the grain structure and mechanical properties of Al-Cu-Mg-Mn alloy tubes under upsetting was investigated. It was found that plastic deformation techniques such as cold upsetting can overcome the disadvantages of the cutting process, such as the anisotropy of the original material, no grain structure, and not high mechanical properties, while also improving the mechanical properties of the product in local plastic deformation zones by changing the grain and fiber structure of the material. This article presents the results of our research and evaluates the increase of material durability in the tubes’ deformation zones compared with the initial state. In this study Al-Cu-Mg-Mn alloy material had been cutting with turn machine and plastic deformation by upsetting. Microstructures and hardness variations of cut surfaces that are obtained with different processes have been investigated.

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Microstructure and Mechanical Properties of the Commercially Pure Copper Tube After Processing by Hydrostatic Tube Cyclic Expansion Extrusion (HTCEE)

Cited by 12 publications

References 52 publications

Effects of trace La addition on corrosion properties of oxygen‐free copper tube in a formic acid environment

Effects of trace La addition on corrosion properties of oxygen‐free copper tube in a formic acid environment

A Promising Approach to Solid-State Hydrogen Storage: Mechanical Nanostructuring Synthesis of Magnesium by High Pressure Torsion Extrusion

IMPROVING THE MECHANICAL PROPERTIES OF Al-Cu-Mg-Mn ALLOY TUBES THROUGH PLASTIC DEFORMATION

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