Effect of aging treatment on the electrical sliding wear behavior of Cu–Cr–Zr alloy

Abstract. The paper studies the effect of the combination of ECAP and cold rolling on the structure, mechanical properties and coefficient of friction of low-alloyed bronzes. It is shown that the use of ECAP together with rolling leads to the formation of a UFG structure and an increase in strength characteristics, while the coefficient of friction is increases. Subsequent heat treatment results in additional hardening by the separation of fine particles, which also reduces the coefficient of friction.

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“…The particles reach sizes up to 12 μm. As already shown in previous studies, the composition of these precipitates corresponds to CrCu2 [2,6].…”

Section: Experimental Methodssupporting

confidence: 78%

Effect of cold rolling on microstructure and mechanical properties of Cu-0,5%Cr-0,2%Zr subjected to ECAP with various NUNBERS of passes

2017

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“…As already shown in previous studies, the composition of these precipitates corresponds to CrCu2 [4,5]. In addition, as shown in [6], the particles of Cu3Zr and Cu5Zr are also represented in the microstructure.…”

Section: Resultssupporting

confidence: 66%

“…There are also many studies on the character, composition and distribution of particles formed during the aging of these alloys [4][5][6]. These studies have shown that particles of the composition CrCu2, Cu3Zr, Cu5Zr are precipitated.…”

Section: Introductionmentioning

confidence: 99%

Formation of a state with high strength and electrical conductivity in the Cu-0.5%Cr-0.2%Zr alloy

2017

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Abstract. The effect of severe plastic deformation by high pressure torsion (HPT) and subsequent aging on the formation of a high-strength state with sufficient electrical conductivity in the Cu-0.5%Cr-0.2% Zr (wt.%) alloy is investigated. It is shown that as a result of HPT and subsequent aging a high-strength state with a tensile strength of ≈ 900 MPa and a conductivity of 70% IACS can be formed.

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“…However, the wear rate of the latter increased rapidly at the sliding velocity of 25 m/s with the electrical current density of 285A/cm 2 and then increased slowly. It has been reported that the wear rate is related to electrical current and the sliding velocity under the similar testing conditions [9,10]. The wear rate of the contact strip increases with the sliding velocity under the current density of 285A/cm 2 .…”

Section: Materials Characteristicsmentioning

confidence: 88%

Improving the Tribological Behavior of Graphite/Cu Matrix Self-Lubricating Composite Contact Strip by Electroplating Zn on Graphite

Chen

et al. 2008

Tribol Lett

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A novel Zn-coated graphite/Cu matrix selflubricating composite contact strip (ZGCCS) was prepared by electroplating, pressing plus roasting and its tribological behaviors against the copper disk were studied under the simulated actual conditions, in comparison with the common graphite/Cu matrix self-lubricating composite (GCCS). The wear rate of both the ZGCCS and the GCCS increased with the increment of the current density and the sliding velocity. However, the ZGCCS exhibited wear resistance superior to the GCCS, indicating the electroplating Zn on graphite played an important role in improving the wear resistance and the wear rate of the former was only one-third of the latter at the sliding velocity of 41.7 m/s and with the current density of 285A/cm 2 . Arc erosion wear, oxidative wear, and adhesive wear were the dominant mechanisms during the electrical sliding process. The arc erosion of the composite contact strip was remarkably reduced by the electroplating of Zn on graphite since the Zn-coated graphite particles were homogeneously distributed in the Cu matrix.

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Effect of aging treatment on the electrical sliding wear behavior of Cu–Cr–Zr alloy

Cited by 88 publications

References 13 publications

Effect of cold rolling on microstructure and mechanical properties of Cu-0,5%Cr-0,2%Zr subjected to ECAP with various NUNBERS of passes

Effect of cold rolling on microstructure and mechanical properties of Cu-0,5%Cr-0,2%Zr subjected to ECAP with various NUNBERS of passes

Formation of a state with high strength and electrical conductivity in the Cu-0.5%Cr-0.2%Zr alloy

Improving the Tribological Behavior of Graphite/Cu Matrix Self-Lubricating Composite Contact Strip by Electroplating Zn on Graphite

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