Effect of carbon on the microstructures and mechanical properties of as cast Nb-base alloy

Ding, Rengen; Jones, I.P.; Jiao, Huisheng

doi:10.1016/j.msea.2007.07.087

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…The phase B and F was mainly formed by the Ti, Nb, and B, and ascribed to (Ti, Nb)B. It was similar to the research of Ding et al 29 It could be clearly observed that phases C, D, E, and F were located in the Zone II, as show in Figure 6C. The elements Cr, Co, Fe, Ni, and Nb were detected in phase D, and the stoichiometry of Cr: Co: Fe: Ni: Ti ratio in atomic percent was close to 1:1:1:1:1.…”

Section: Resultssupporting

confidence: 88%

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Microstructure and mechanical properties of ZrB₂‐SiC/Nb joints brazed with CoFeNiCrCuTi_x high‐entropy alloy filler

Yang

Wang

et al. 2021

J. Am. Ceram. Soc.

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ZrB 2 -SiC ceramics and Nb alloy were brazed at 1160°C for 60 min with CoFeNiCrCuTi x high-entropy alloy filler. The influence of Ti content on the interface structure and mechanical properties of ZrB 2 -SiC/Nb joint was systematically studied. It is found that the rich-Ti Laves phase was formed due to the addition of large atomic size Ti fill into the filler alloy or brazing joint, and its content increases with Ti content.The joint brazed by high-entropy alloys filler without Ti can be divided into a toothshaped Cr 2 B reaction layer and a central area composed of a eutectic mixed structure of FCC phase and rich-Nb lamellar Laves phase. Ti and Nb are mutual solid solution elements. The increase of Ti content in the joint makes the FCC phase and the rich-Nb lamellar Laves phase to transform into a big bulk Ti-rich Laves phase and the quadrilateral (Ti, Nb)B phase. The tooth-shaped Cr 2 B was disappeared. The residual stress generated in the joint during the brazing process tends to cause defects such as holes and microcracks in the bulk Ti-rich brittle Laves phase. Therefore, with the addition of Ti, the normal temperature performance of the joint decreases from 216 MPa to 52 MPa. However, with the increase of Ti, the high-temperature mechanical properties of the joint first decrease, and then increase. It was mainly due to the formation of rich-Ti Laves phase and quadrilateral (Ti, Nb)B with excellent high-temperature mechanical properties. When brazing with CoFeNiCrCuTi 1.5 filler, the high-temperature performance of the joint reached 92% of its room temperature performance.

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Section: Resultssupporting

confidence: 88%

“…The phase B and F was mainly formed by the Ti, Nb, and B, and ascribed to (Ti, Nb)B. It was similar to the research of Ding et al 29 …”

Section: Resultssupporting

confidence: 88%

Microstructure and mechanical properties of ZrB₂‐SiC/Nb joints brazed with CoFeNiCrCuTi_x high‐entropy alloy filler

Yang

Wang

et al. 2021

J. Am. Ceram. Soc.

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“…This results in the initiation of cracks within the carbide thus leading to a reduction in ductility. 24 Therefore, the hypothesis is that the high concentration of Cr in these alloys may have been a crucial factor in the sensitivity to the casting process. Therefore, basic alloys with low Cr content tend to behave indifferently, irrespective of how they are cast, in this case the Suprem Cast V alloy.…”

Section: Discussionmentioning

confidence: 99%

Does the casting mode influence microstructure, fracture and properties of different metal ceramic alloys?

et al. 2012

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The aim of the present study was to evaluate the tensile strength, elongation, microhardness, microstructure and fracture pattern of various metal ceramic alloys cast under different casting conditions. Two Ni-Cr alloys, Co-Cr and Pd-Ag were used. The casting conditions were as follows: electromagnetic induction under argon atmosphere, vacuum, using blowtorch without atmosphere control. For each condition, 16 specimens, each measuring 25 mm long and 2.5 mm in diameter, were obtained. Ultimate tensile strength (UTS) and elongation (EL) tests were performed using a Kratos machine. Vickers Microhardness (VM), fracture mode and microstructure were analyzed by SEM. UTS, EL and VM data were statistically analyzed using ANOVA. For UTS, alloy composition had a direct influence on casting condition of alloys (Wiron 99 and Remanium CD), with higher values shown when cast with Flame/Air (p < 0.05). The factors 'alloy" and 'casting condition" influenced the EL and VM results, generally presenting opposite results, i.e., alloy with high elongation value had lower hardness (Wiron 99), and casting condition with the lowest EL values had the highest VM values (blowtorch). Both factors had significant influence on the properties evaluated, and prosthetic laboratories should select the appropriate casting method for each alloy composition to obtain the desired property.

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“…In his study, the solubility of Nb in TiB is up to 23 at.% and the highest solubility of Ti in NbB is 15 at.%. Ding et al [24] found that only the single β(Ti,Nb)ss phase appeared in the Nb-based alloy when the addition J o u r n a l P r e -p r o o f according to XRD patterns; however, the SEM image and EDX analysis show that only Z3 exhibits large residual ZrB 2 particles, as indicated by D3. The amount of ZrB 2 in Z2 is too small to be distinguished by a scanning electron microscope due to its the limited resolution.…”

Section: Microstructure Characterizationmentioning

confidence: 99%

Investigation on strengthening and toughening mechanisms of Nb-Ti-ZrB2 metal matrix ceramic composites reinforced with in situ niobium and titanium boride

Gao

Liu

Wang

et al. 2020

International Journal of Refractory Metals and Hard Materials

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Effect of carbon on the microstructures and mechanical properties of as cast Nb-base alloy

Cited by 14 publications

References 20 publications

Microstructure and mechanical properties of ZrB₂‐SiC/Nb joints brazed with CoFeNiCrCuTi_x high‐entropy alloy filler

Microstructure and mechanical properties of ZrB₂‐SiC/Nb joints brazed with CoFeNiCrCuTi_x high‐entropy alloy filler

Does the casting mode influence microstructure, fracture and properties of different metal ceramic alloys?

Investigation on strengthening and toughening mechanisms of Nb-Ti-ZrB2 metal matrix ceramic composites reinforced with in situ niobium and titanium boride

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Effect of carbon on the microstructures and mechanical properties of as cast Nb-base alloy

Cited by 14 publications

References 20 publications

Microstructure and mechanical properties of ZrB2‐SiC/Nb joints brazed with CoFeNiCrCuTix high‐entropy alloy filler

Microstructure and mechanical properties of ZrB2‐SiC/Nb joints brazed with CoFeNiCrCuTix high‐entropy alloy filler

Does the casting mode influence microstructure, fracture and properties of different metal ceramic alloys?

Investigation on strengthening and toughening mechanisms of Nb-Ti-ZrB2 metal matrix ceramic composites reinforced with in situ niobium and titanium boride

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Product

Resources

About

Microstructure and mechanical properties of ZrB₂‐SiC/Nb joints brazed with CoFeNiCrCuTi_x high‐entropy alloy filler

Microstructure and mechanical properties of ZrB₂‐SiC/Nb joints brazed with CoFeNiCrCuTi_x high‐entropy alloy filler