| Autor: |
Liang, Shenglong, Liu, Xiaochun, Jiang, Suihe, Zhu, Huihui, Li, Wei, Liu, Leqing, Liu, Xiongjun, Wu, Yuan, Zhang, Xiaobin, Wang, Hui, Lu, Zhaoping |
| Předmět: |
|
| Zdroj: |
Journal of Materials Science & Technology; May2024, Vol. 181, p220-230, 11p |
| Abstrakt: |
• A feasible and facile route for the mass production of ultrafine grained Cu-based alloys. • Fast precipitation of coherent particles during recrystallization enables the grain refinement of the recrystallized matrix. • High thermal stability is achieved through the strong pinning effect of the coherent precipitates; the stability temperature is higher than 750 °C (∼ 0.75 T m). Producing ultrafine-grained (UFG) microstructures with enhanced thermal stability is an important yet challenging route to further improve mechanical properties of structural materials. Here, a high-performance bulk UFG copper that can stabilize even at temperatures up to 750 °C (∼ 0.75 T m , T m is the melting point) was fabricated by manipulating its recrystallization behavior via low alloying of Co. Addition of 1 wt.%–1.5 wt.% of Co can trigger quick and copious intragranular clustering of Co atoms, which offers high Zener pinning pressure and pins the grain boundaries (GBs) of freshly recrystallized ultrafine grains. Due to the fact that the subsequent growth of the coherent Co-enriched nanoclusters was slow, sufficient particles adjacent to GBs remained to inhibit the migration of GBs, giving rise to the UFG microstructure with prominently high thermal stability. This work manifests that the strategy for producing UFGs with coherent precipitates can be applied in many alloy systems such as Fe- and Cu-based, which paves the pathway for designing advanced strain-hardenable UFGs with plain compositions. [Display omitted] [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full Text from ScienceDirect