Formation mechanism of in-situ nanostructured grain in cast Cu–10Sn–2Zn–1.5Fe–0.5Co (wt.%) alloy

Chen, Kaixuan; Xiao-hua, Chen; Ding, Ding; Shi, Guodong; Wang, Zidong

doi:10.1016/j.matdes.2016.01.064

Cited by 25 publications

(32 citation statements)

References 32 publications

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“…Fe and Co elements are selected to be added into Tin bronze and pure Cu during the casting process in order to fabricate in-situ nanoparticle reinforced Cu alloys with NPFG structure, which has numerous iron-rich nanoparticles (NP) dispersed within fine grains (20-40 µm, FG) [38,40,41,[62][63][64][65][66][67][68][69][70]. The NPFG structure is in-situ formed during the casting process, so it can be widely applied in mass production of metallic structural material with complex shapes.…”

Section: Thermodynamic Calculationmentioning

confidence: 99%

“…Precipitation behavior of iron-rich nanoparticles during solidification was investigated by DSC thermal analysis, as shown in Figure 6 [64]. The as-cast Cu-10Sn-2Zn-1.5Fe-0.5Co alloy was melted and heated until 1573 K, and then cool down at a rate of about 20 K/min.…”

Section: Dsc (Differential Scanner Calorimetry) Analysismentioning

confidence: 99%

“…Schematic diagram of the preparation technology for tin bronze alloy with NPFG structure is displayed in Figure 7 [64]. Actually, the whole process is very simple, including solid (Fe, Co)-liquid doping, uniform distribution of all atoms, in-situ generation of nanoparticles, formation of Cu adsorption layer, nucleation catalysis by encapsulated nanoparticles.…”

Section: Fabrication Techniquementioning

confidence: 99%

“…NPFG structure in-situ formed in cast Cu-10Sn-2Zn-1.5Fe-0.5Co (wt. %) alloy [64]. Large amounts of iron-rich particles in-situ form in the melt at first, which can absorb Cu atoms in the melt.…”

Section: Fabrication Techniquementioning

confidence: 99%

“…Strong grain refinement effect can emerge by heterogeneous nucleation caused by in-situ nanoparticles in our investigated alloys. Several optical images and statistic results of as-cast Ni-Cr-Mo HSLA steel [58], hot rolled Q195 steel [33], as-cast tin bronze [64], pure Cu and Cu-Fe-Co alloy [69] are shown in Figure 13. Typical dendritic structure with various orders of developed dendrite arms can be seen in conventional as-cast HSLA steel, while in nanoparticle strengthened HSLA steel the amount of dendrites is reduced obviously and equiaxed grains appear [58].…”

Section: Grain Refinementmentioning

confidence: 99%

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In-Situ Nanoparticles: A New Strengthening Method for Metallic Structural Material

et al. 2018

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Over the past several years, coherent interface strengthening was proposed and has since drawn much attention. Unfortunately, many fabrication techniques are restricted to very small size. Recently, a brand new method of in-situ nanoparticle strengthening was systematically investigated, which was proved to be an efficacious way to optimize microstructure and improve mechanical property by utilizing uniformly dispersed nanoparticles. In this review, we summarized recent related advances in investigated steels and Cu alloys, including details of preparation technique and characterization of in-situ nanoparticles. In-situ nanoparticles formed in the melt possess a coherent/semi-coherent relationship with the matrix, which has a similar effect of coherent interface strengthening. In this case, bulk metallic structural materials with dispersed nanoparticles in the matrix can be fabricated through conventional casting process. The effects of in-situ nanoparticles on grain refinement, inhibiting segregation, optimizing inclusions and strengthening are also deeply discussed, which is beneficial for obtaining comprehensive mechanical response. Consequently, it is expected that in-situ nanoparticle strengthening method will become a potential future direction in industrial mass production.

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