Effects of Multi-Pass Butt-Upset Cold Welding on Mechanical Performance of Cu-Mg Alloys
Yuan Yuan, Yong Pang, Zhu Xiao, Shifang Li, Zejun Wang · 2025
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Description
High-speed rail wires are drawn from a strong copper-magnesium alloy that resists ordinary welding heat. Yuan Yuan and co-authors joined the wires cold instead, by butting the ends and upsetting them under pressure, pass after pass. No surface preparation was used. The joints reached ninety-six percent of the base wire's strength at their peak.
Four passes captured nearly all the benefit. Under the microscope, the bond zone showed a gradient structure: fine, freshly recrystallized grains at the edges, and a nano-layered, twin-rich core. Repeated squeezing flows the metal sideways, scrubbing contaminants off the interface as it bonds. The authors lay out this self-cleaning mechanism to guide industrial use of the heat-free method.
Catalog record
| CREATOR | Yuan Yuan, Yong Pang, Zhu Xiao, Shifang Li, Zejun Wang |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 28 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |