Excellent mechanical properties and high electrical conductivity of Cu-Co-Si-Ti alloy due to multiple strengthening

Geng, Yongfeng; Ban, Yijie; Li, Xu; Zhang, Yi; Jia, Yanlin; Tian, Baohong; Zhou, Meng; Liu, Yong; Volinsky, Alex A.; Song, Kexing; Tang, Shunlong

doi:10.1016/j.msea.2021.141639

Cited by 23 publications

(6 citation statements)

References 46 publications

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“…In this case, the specific electric conductivity was measured and was equal to 1.05% of IACS (58˖10 6 S/m at 20 o C [11]), or 0.61˖10 6 S/m. In [1] there was obtained value of 41.7% IACS for the same property of quite a similar alloy.…”

Section: Discussionmentioning

confidence: 59%

“…The main reason for the exceptional stability of the specific electrical conductivity of Ti-Cu-Co-Si alloys, in the range of middle-high temperatures 250… 350 0 C with annealing time of 3000 hours, is recorded while manufacturing materials internal mechanical stresses. The latter has arisen due to evolving Co2Si or Cu4Ti nanoprecipitates according to [1].…”

Section: Discussionmentioning

confidence: 99%

“…Comparison of the high-researched drift for 3000 hours at 350 o C with studying in [1] the same alloy, held out at 500°C for much less time 0.5 hour, showed the following: our material is inherent in the low specific conductivity <0.61˖10 6 Sim / m or 1.3% IACS [11][12]; and for the material of [1] the high conductivity 41.7% IACS was recorded.…”

Section: Consideration Of Mechanisms and Identification Of Possible R...mentioning

confidence: 99%

“…Some studies of high-entropy alloys (HEAs) [1][2][3] for the needs of various branches of science and technology have demonstrated the following. The HEAs are characterized "as a superb specific strength, excellent mechanical performance at high temperature, exceptional ductility and fracture toughness at cryogenic temperatures, superparamagnetism, and superconductivity" [3].…”

Section: Introductionmentioning

confidence: 99%

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Electrical Properties of Ti-Cu-Co-Si High-Entropy Alloy

Yatsyshyn¹,

Skoropad²,

Karpinski³

2022

MEM

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To study the metrological characteristics, there were studied manufactured based on the Ti-Cu-Co-Si alloy, obtained by quenching from the melt, the sensitive element of the resistance thermotransducer. The instability of its metrological characteristics as a function of temperature up to 350 oC and operation time up to 3000 hours was investigated; it does not exceed 0.025% under the worst operating conditions. In addition, the methodological error of measurement caused by heating of the sensitive element by the measuring current was examined. It was shown that the recorded changes in electrical resistance were outside the value of the methodological error. They may be due to the presence of nanostructured fields of mechanical stresses and the formation of nanoprecipitates as a consequence of manufacturing.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Section: Consideration Of Mechanisms and Identification Of Possible R...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrical Properties of Ti-Cu-Co-Si High-Entropy Alloy

Yatsyshyn¹,

Skoropad²,

Karpinski³

2022

MEM

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“…Increasing strength by solid solution strengthening requires significant amounts of additional alloying elements, which drastically decreases the thermal conductivity of copper alloys. Among others systems, e.g., Cu-Ni-Mn [8], Cu-Ag [9], Cu-Co [10], Cu-Mg [11,12] and Cu-Fe-P [13], alloy concepts based on the binary Cu-Cr and Cu-Zr systems have been considered for the development of highly conductive high-strength copper alloys [14], which are interesting because they do not contain highly toxic beryllium. [15].…”

Section: Introductionmentioning

confidence: 99%

Laser Additive Manufacturing of Oxide Dispersion-Strengthened Copper–Chromium–Niobium Alloys

Wilms

Rittinghaus

2022

JMMP

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Copper is a key material for cooling of thermally stressed components in modern aerospace propulsion systems, due to its high thermal conductivity. The use of copper materials for such applications requires both high material strength and high stability at high temperatures, which can be achieved by the concept of oxide dispersion strengthening. In the present work, we demonstrate the oxide reinforcement of two highly conductive precipitation-strengthened Cu-Cr-Nb alloys using laser additive manufacturing. Gas-atomized Cu-3.3Cr-0.5Nb and Cu-3.3Cr-1.5Nb (wt.%) powder materials are decorated with Y2O3 nanoparticles by mechanical alloying in a planetary mill and followed by consolidation by the laser additive manufacturing process of laser powder bed fusion (L-PBF). While dense specimens (>99.5%) of reinforced and nonreinforced alloys can be manufactured, oxide dispersion-strengthened alloys additionally exhibit homogeneously distributed oxide nanoparticles enriched in yttrium and chromium next to Cr2Nb precipitates present in all alloys examined. Higher niobium contents result in moderate increase of the Vickers hardness of approx. 10 HV0.3, while the homogeneously dispersed nanometer-sized oxide particles lead to a pronounced increase of approx. 30 HV0.3 in material strength compared to their nonreinforced counterparts.

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