Strength properties and structure of CuCrZr alloy subjected to low-temperature KOBO extrusion and heat treatment

Ostachowski, Paweł; Bochniak, W.; Łagoda, М.; Ziółkiewicz, S.

doi:10.1007/s00170-019-04602-4

Cited by 12 publications

(2 citation statements)

References 60 publications

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“…The first step of the aging heat treatment, solution treatment, was carried out at 1010 °C for 45 minutes in the light of previous studies in literature [3,[33][34][35][36][37]. Supersaturated copper alloys were obtained by quenching the specimens after solution treatment.…”

Section: Experimental Studiesmentioning

confidence: 99%

Investigation of structural, electrical and tribological properties of duplex surface treated and aged Cu−Cr−Zr alloy

Çelik

Yuksel²

2023

Materialwissenschaft Werkst

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In this study, Cu−Cr−Zr alloy specimens were first subjected to aging heat treatment at 500 °C for two different durations (2 hours and 4 hours). Three different coating processes (silver, silver/copper duplex, and copper/silver duplex) were applied to the aged specimens using the physical vapor deposition method. Tensile test, microhardness measurement, wear test, electrical conductivity measurement and structural analysis (x‐ray diffraction and scanning electron microscope) were applied to the specimens. After the aging processes, the highest hardness and strength values of the Cu−Cr−Zr alloy were obtained in the specimens that were aged at 500 °C for 4 hours. When the wear resistance and electrical conductivity of the coated specimens were examined, it was determined that the specimens with duplex surface treatment performed better.

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Section: Experimental Studiesmentioning

confidence: 99%

Investigation of structural, electrical and tribological properties of duplex surface treated and aged Cu−Cr−Zr alloy

Çelik

Yuksel²

2023

Materialwissenschaft Werkst

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“…In the case of the KOBO method, better mechanical properties were obtained after the application of cast alloys of aluminum [17,42,43], magnesium [44][45][46][47][48][49][50], and copper [51][52][53][54][55], as well as composite ingots with matrices of aluminum [56], magnesium [57], and silver matrix composites [58]. The application of magnesium powder to KOBO extrusion is a new technological concept, which requires studies covering potential rod fabrication from magnesium powders, shavings, and matrix composites with functional phases.…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnesium Powder Application on the Microstructure and Properties of Rods Extruded by the Forward-Backward Rotating Die Extrusion Method

et al. 2022

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The effects of severe plastic deformation (SPD) with a forward-backward rotating die (KOBO extrusion) on pure magnesium, in the form of cold-compacted powder, sintered powder, or cast ingots as reference, were examined. This method is known to reinforce metals, but the role of the initial form of magnesium applied in the fabrication of metal-based rods, as well as related phenomena, has not been characterized until now. The problem is important in the potential processing of commercial metal powders, the recycling of metal shavings, and the fabrication of metal matrix composites with discontinuous reinforcing phases. In the presented experiments, rods of 8 mm in diameter and 400 mm in length were obtained, and the structural effects induced by KOBO that occurred on a macro- and microscale on the surface and cross sections were characterized. Changes in the size and orientation of α-Mg crystallites were determined by XRD. The porosity, hardness, tensile strength, and compressive strength were measured, and the mechanisms of decohesion dependent on starting metal form were analyzed. After KOBO extrusion, significant differences were observed in the microstructure and properties between the materials derived from cold-compacted powder, sintered powder, and reference cast magnesium. Due to the application of KOBO, apart from α-Mg grain refinement, the MgO derived from the initial powder’s surface was refined to fine regular particles surrounded by magnesium. Their bands curved in the perpendicular plane and were oriented with the extrusion direction of the formed network, which augmented some mechanical properties and changed the decohesion mechanism. The conducted experiments revealed that before extrusion by KOBO, the magnesium powder required sintering under pressure.

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High-Strain-Rate Behavior of 3D-Printed CuCrZr

Sasso

Mancini²,

Utzeri³

et al. 2022

Dynamic Behavior of Materials, Volume 1

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Strength properties and structure of CuCrZr alloy subjected to low-temperature KOBO extrusion and heat treatment

Cited by 12 publications

References 60 publications

Investigation of structural, electrical and tribological properties of duplex surface treated and aged Cu−Cr−Zr alloy

Investigation of structural, electrical and tribological properties of duplex surface treated and aged Cu−Cr−Zr alloy

Effect of Magnesium Powder Application on the Microstructure and Properties of Rods Extruded by the Forward-Backward Rotating Die Extrusion Method

High-Strain-Rate Behavior of 3D-Printed CuCrZr

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