Precipitates-interaction capture of nano-sized iron-rich precipitates during copper solidification

Chen, Kaixuan; Chen, Xiaohua; Wang, Zidong

doi:10.1080/02670836.2019.1578918

Cited by 7 publications

(4 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This heterogeneous nucleation effect from iron-rich nanoparticles effectively refines the copper grains [44,48]. In addition, during the nucleation and growth of copper crystals, most of the iron-rich nanoparticles fail to become the substrate for heterogeneous nucleation, and are spontaneously captured by the liquid-solid interface during the growth of copper grains/crystals (stage II in Figure 2) and dispersed inside the copper grains [67]. After solidification, during the cooling process of solid copper alloy, the new iron-rich nanoparticles nucleate and grow in the solid matrix, along with the evolution of crystal structure and morphological transition from spherical to petal-like shape [44,47].…”

Section: Design Idea and In-situ Fabrication Routementioning

confidence: 99%

See 1 more Smart Citation

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

Chen

et al. 2022

Metals

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Design Idea and In-situ Fabrication Routementioning

confidence: 99%

“…Wang et al [67] used the nanoparticle capture model proposed by J.Q. Xu [14] to explain the capture mechanism of iron-rich nanoparticles in as-cast NPFG structure copper alloy.…”

Section: Capture Mechanism Of Iron-rich Nanoparticles By Solidificati...mentioning

confidence: 99%

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

Chen

et al. 2022

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, apart from the phase transition of α-Fe to ε-Fe, for a certain range of pressure and temperature, α-Fe is found to be transformed into reversible γ-Fe with a face-centered cubic (FCC) structure [24][25][26]. Although γ-Fe with an FCC structure is stable at higher temperatures, in certain instances, this can be found to be present at ambient condition as well, especially during solidification process in Cu-Fe alloys [27][28][29]. Similar to the α-Fe, γ-Fe has also been found to undergo martensitic phase transformation without being aided by higher temperatures owing to the application of deformation [30,31].…”

Section: Introductionmentioning

confidence: 99%

Phase Transitions of Cu and Fe at Multiscales in an Additively Manufactured Cu–Fe Alloy under High-Pressure

et al. 2022

View full text Add to dashboard Cite

A state of the art, custom-built direct-metal deposition (DMD)-based additive manufacturing (AM) system at the University of Michigan was used to manufacture 50Cu–50Fe alloy with tailored properties for use in high strain/deformation environments. Subsequently, we performed preliminary high-pressure compression experiments to investigate the structural stability and deformation of this material. Our work shows that the alpha (BCC) phase of Fe is stable up to ~16 GPa before reversibly transforming to HCP, which is at least a few GPa higher than pure bulk Fe material. Furthermore, we observed evidence of a transition of Cu nano-precipitates in Fe from the well-known FCC structure to a metastable BCC phase, which has only been predicted via density functional calculations. Finally, the metastable FCC Fe nano-precipitates within the Cu grains show a modulated nano-twinned structure induced by high-pressure deformation. The results from this work demonstrate the opportunity in AM application for tailored functional materials and extreme stress/deformation applications.

show abstract

“…According to Lei et al [13], the addition of a small amount of Al to a Cu-Ni-Si alloy can form fine Ni 3 Al particles in the alloy, which can improve the mechanical properties of the alloy. Currently, studies on the microstructure and properties of typical precipitation-strengthened copper alloys show that solid solution and ageing heat treatments can significantly improve the conductivity and mechanical properties of the alloys [14,15]. Zhou et al [16] studied the ageing behaviour of a Cu-0.23Be-0.84Co alloy at 460°C.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment on microstructure and mechanical properties of Cu–6.9Ni–2.97Al–0.99Fe–1.06Mn alloy

Yang

Wen

Zhou

et al. 2020

Materials Science and Technology

View full text Add to dashboard Cite

The effect of heat treatment on the mechanical properties and microstructures of Cu–6.9Ni–2.97Al–0.99Fe–1.06Mn alloys was investigated. The results show that the microstructure of the as-cast alloy mainly consists of an alpha-copper matrix and γ-phase Ni3Al particles. The microstructure of the alloy after solution treatment at 950°C for 2 h is a single-phase alpha-copper supersaturated solid solution and the second-phase strengthening disappears. After ageing treatment at 550°C for 6 h, the γ-phase particles are fully precipitated, and the mechanical properties of the alloy are significantly improved. The tensile strength is increased from 305 to 588 MPa. Quasi-cleavage fracture with shallow dimples appeared in the Cu–6.9Ni–2.97Al–0.99Fe–1.06Mn alloy aged at 550°C for 6 h.

show abstract

Precipitates-interaction capture of nano-sized iron-rich precipitates during copper solidification

Cited by 7 publications

References 57 publications

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

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

Phase Transitions of Cu and Fe at Multiscales in an Additively Manufactured Cu–Fe Alloy under High-Pressure

Effect of heat treatment on microstructure and mechanical properties of Cu–6.9Ni–2.97Al–0.99Fe–1.06Mn alloy

Contact Info

Product

Resources

About