Low cycle fatigue behavior of precipitation-strengthened Cu-Cr-Zr contact wires
Source abstract
Abstract
Abstract The low cycle fatigue behavior (Δet/2 = 0.4–1.0%) of a Cu-Cr-Zr alloy strengthened with nanoscale precipitates has been tested at room temperature. The results showed that cyclic softening occurs under all Δet/2 after cyclic hardening. However, the Cu-Cr-Zr alloy exhibited secondary cycle hardening after a brief softening at high Δet/2 (0.8%, 1.0%). In strong contrast to the fatigue fracture surface at Δet/2 = 0.4%, Δet/2 = 1.0% was characterized by multiple fatigue sources and obvious fatigue striations. Moreover, a sawtooth-like feature formed and the fracture mode was mainly brittle with few regions of ductile aspects. Compared with the original characteristics, the microstructure after different values of Δet/2 was markedly different, and the dislocation density gradually increased with the increases of Δet/2.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microstructure and mechanical properties · Mechanical stress and fatigue analysis · Metal Alloys Wear and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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