In-Situ Fabrication, Microstructure and Mechanical Performance of Nano Iron-Rich Precipitate Reinforced Cu and Cu Alloys

Abstract

In this paper, the research progress on the strengthening of copper and copper alloy is reviewed. The research shows that traditional strengthening methods are often accompanied by the decrease of plasticity, and there are limitations in size, cost, and other aspects in the process. The in-situ nanoparticle strengthening and plasticizing technology proposed in recent years can avoid the above problems. In this paper, the idea of in-situ nanoparticle strengthening is introduced to realize the simultaneous enhancement of strength and ductility of as-cast pure copper and tin bronze alloys. The effects of in-situ precipitation of iron-rich nanoparticles on the microstructure, and mechanical properties of different copper alloy systems, are systematically elucidated based on the former characterization and mechanical testing results. The results show that the in-situ introduction of iron-rich nanoparticles in the copper systems induces the formation of a nano precipitate-fine grain (NPFG) structure, which greatly improves the strength and ductility of copper alloys. The evolution of size, distribution, number density, morphology evolution in iron-rich nanoparticles, and the formation mechanism of NPFG structure, as well as the mechanism of NPFG strengthening and toughening, are summarized. An industrial-applicable casting process is proposed to prepare bulk NPFG structured copper alloys with complex shape, high strength, and high ductility.

Effect of Bi Content on the Microstructure, Mechanical and Tribological Properties of Cu-Sn Alloy

“…According to the scanning results of points C and D, it can be seen that the α-Cu phase does not contain dissolved Pb or Bi. From Figure 4b, α-Cu phase, δ-phase, Pb phase and Bi phase are detected in the alloy [20][21][22], and no other phases containing the Bi element are observed. Among these phases, the α-Cu phase is the main phase of Cu-Sn alloy, and the δ-phase is the hard phase present between the dendrites of the matrix which increases the strength and hardness of the alloy.…”

Insight into the Influence of Alloying Elements on the Elastic Properties and Strengthening of Copper: A High-Throughput First-Principles Calculations

“…Copper and Copper alloys, favored for their excellent mechanical properties and high electrical conductivity, are critical materials in the automotive industry, aerospace, and integrated circuits [1][2][3][4][5][6][7][8][9]. To enhance the comprehensive performance of copper alloys, some alloying elements are usually added, such as Al [10], Ti [11], Fe [12], Zr [13], Cr [14], and Mg [15].…”

Investigation on Various Ceramic Nanoparticles Reinforced Aluminum Matrix Composites via Accumulative Roll Bonding and Cryorolling

“…Furthermore, the presence of nanoparticles or particle/matrix interfaces increases the potential for suppressing crack initiation and propagation, leading to advantageous improvements in the mechanical properties of the composites. [ 18,19 ] Thus, it is expected that utilizing nanoparticles as reinforcement will result in high‐performance nanocomposites.…”