High strength and good electrical conductivity in Cu–Cr alloys processed by severe plastic deformation

Добаткин, С. В.; Gubicza, Jenő; Shangina, D.V.; Бочвар, Н. Р.; Tabachkova, N. Yu.

doi:10.1016/j.matlet.2015.03.144

Cited by 102 publications

(38 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the past two decades, numerous investigations were carried to study the microstructure and the mechanical properties of various SPD processed alloys, such as Al-Mg, Al-Zn-Mg, Cu-Zn, Cu-Al, Cu-Cr, Cu-Zr etc. [14][15][16][17][18][19][20][21][22][23]. However, no research was conducted to date to examine the effect of Mo solute atoms on the microstructure of UFG Ni processed by SPD, although Ni-Mo alloys have important practical applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo addition on the microstructure and hardness of ultrafine-grained Ni alloys processed by a combination of cryorolling and high-pressure torsion

Kapoor

Huang

Sarma

et al. 2017

Materials Science and Engineering: A

View full text Add to dashboard Cite

An investigation was conducted to examine the effect of molybdenum (Mo) content on the grain size, lattice defect structure and hardness of nickel (Ni) processed by severe plastic deformation (SPD). The SPD processing was applied to Ni samples with low (~0.3 at.%) and high (~5 at.%) Mo concentrations by a consecutive application of cryorolling and highpressure torsion (HPT). The grain size and the dislocation density were determined by scanning electron microscopy and X-ray line profile analysis, respectively. In addition, the hardness values in the centers, half-radius and peripheries of the HPT-processed disks was determined after ½, 5 and 20 turns. The results show the higher Mo content yields a dislocation density about two times larger and a grain size about 30% smaller. The smallest value of the grain size was ~125 nm and the highest measured dislocation density was ~60 × 10 14 m -2 for Ni-5% Mo. For the higher Mo concentration, the dislocation arrangement parameter was larger indicating a less clustered dislocation structure due to the hindering effect of Mo on the rearrangement of dislocations into low energy configurations. The resultsshow there is a good correlation between the dislocation density and the yield strength using the Taylor equation. The  parameter in this equation is slightly lower for the higher Mo concentration in accordance with the less clustered dislocation structure.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Mo addition on the microstructure and hardness of ultrafine-grained Ni alloys processed by a combination of cryorolling and high-pressure torsion

Kapoor

Huang

Sarma

et al. 2017

Materials Science and Engineering: A

View full text Add to dashboard Cite

show abstract

“…[1] Previous studies showed possibility of the formation of submicrocrystalline structure and efficient aging in Cr, Zr, and CrZr bronzes by SPD methods such as equal channel angular pressing (ECAP) [2][3][4][5][6][7][8][9][10][11][12][13][14][15] and highpressure torsion (HPT). [16][17][18][19][20][21][22][23] Alloying of Cu with zirconium results in increased thermal stability due to precipitation hardening and suppression of grain growth during aging. Along with strength and thermal stability increase in ultrafine-grained (UFG) low alloyed bronzes, SPD allows to improve some functional properties such as wear resistance, [13,15] electrical conductivity, [2,4,[12][13][14][19][20][21][22][23] fatigue life, [2][3][4]6] etc.…”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18][19][20][21][22][23] Alloying of Cu with zirconium results in increased thermal stability due to precipitation hardening and suppression of grain growth during aging. Along with strength and thermal stability increase in ultrafine-grained (UFG) low alloyed bronzes, SPD allows to improve some functional properties such as wear resistance, [13,15] electrical conductivity, [2,4,[12][13][14][19][20][21][22][23] fatigue life, [2][3][4]6] etc. However, in terms of electrotechnical applications, the most important is the combination of high strength and electrical conductivity provided by high thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Aging Processes in Ultrafine‐Grained Low‐Alloyed Bronzes Subjected to Equal Channel Angular Pressing

2015

View full text Add to dashboard Cite

The aging processes in Cu-0.7% Cr, Cu-0.9% Hf, and Cu-0.7% Cr-0.9% Hf alloys after equal channel angular pressing have been studied. ECAP leads to strong grain refinement (200 nm for Cu-0.7% Cr-0.9% Hf alloy). It was shown that the Cu 5 Hf particles are more efficient as strengthening phase than the particles of Cr-based solid solution. Alloying with hafnium also improves the thermal stability of hardening and minimizes recrystallization processes at aging temperatures. Temperature-time aging regimes of bronzes for achieving optimal combination of strength, ductility, and electrical conductivity were also determined. Ternary alloy after aging at 500°C for 2.5 h has a tensile strength of 582 MPa, an elongation of 18%, and an electrical conductivity of 75% IACS.

show abstract

“…Nanostructured copper alloys often demonstrate the interesting combination of electrical conductivity and mechanical strength that makes them good candidates for future engineering applications [1]. Nanostructuring of copper alloys may also improve wear resistance [2,3], radiation resistance [4] and magnetic properties [5,6]. A popular way to achieve ultrafine grained (UFG) or nanoscale structures (NS) is the application of severe plastic deformation (SPD) processes (such as equal channel angular pressing (ECAP) or high-pressure torsion (HPT)) that have been intensively studied during the last two decades [7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical properties and aging behaviour of nanocrystalline copper–beryllium alloy

Lomakin

Castillo-Rodríguez

Sauvage

2019

Materials Science and Engineering: A

View full text Add to dashboard Cite

A complex study of aging kinetics for both coarse-grained and nanostructured by severe plastic deformation Cu -2 wt.% Be alloy is reported. It is shown that aging of a coarse-grained alloy leads to continuous formation of nanosized CuBe body centred cubic (bcc, CsCltype) semi-coherent particles with the {220} Cu // {200} CuBe crystallographic orientation relationship. These particles created significant internal stress fields and became obstacles for dislocation glide that resulted in a change in the hardness from 95 Vickers hardness (HV) for the solubilized alloy to 400 HV for the aged one. The severe plastic deformation led to the formation of a single-phase nanograined microstructure with an average grain size of 20 nm and 390 HV. It was found that this grain size was slightly driven by grain boundary segregation. Further aging of the nanocrystalline alloy led to the discontinuous formation of precipitates on the former Cu grain boundaries and skipping of metastable phases. Significant age hardening with a maximum hardness of 466 HV for the aged nanostructured alloy was observed.Mechanical tests result revealed a strong influence of microstructure and further aging on strength capability of the alloy for both coarse-grained and nanostructured alloy. A good thermal stability in the nanostructured alloy was also noticed. Theoretical calculations of the hardness value for the CuBe phase are provided. It was shown that Be as a light alloying elements could be used for direct change of microstructure and aging behaviour of severely deformed copper alloys.

show abstract

High strength and good electrical conductivity in Cu–Cr alloys processed by severe plastic deformation

Cited by 102 publications

References 13 publications

Effect of Mo addition on the microstructure and hardness of ultrafine-grained Ni alloys processed by a combination of cryorolling and high-pressure torsion

Effect of Mo addition on the microstructure and hardness of ultrafine-grained Ni alloys processed by a combination of cryorolling and high-pressure torsion

Aging Processes in Ultrafine‐Grained Low‐Alloyed Bronzes Subjected to Equal Channel Angular Pressing

Microstructure, mechanical properties and aging behaviour of nanocrystalline copper–beryllium alloy

Contact Info

Product

Resources

About