Microstructure evolution and mechanical properties of Nb–Si based alloy processed by electromagnetic cold crucible directional solidification

Yan, Yuncheng; Ding, Hongsheng; Kang, Yongwang; Song, Jinxia

doi:10.1016/j.matdes.2013.10.017

Cited by 69 publications

(13 citation statements)

References 24 publications

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“…The average eutectic spacing values measured on the longitudinal (λ L ) and transverse (λ T ) sections of the samples are given in Table 1. With increasing the solidification rate from 8.3 to 166 µm/s, λ L (lamellar) decreased from 2.72 to for Bi-2.0Zn-0.2Al (wt.%) eutectic alloy, by Yan et al 50 for Nb-22Ti-16Si-3Cr-3Al-2Hf (at.%) alloy, respectively. Since ternary cooperative growth has not been observed in this study, the exponent value of 0.5 predicted by the JacksonHunt eutectic theory 51 for binary eutectics was not obtained.…”

mentioning

confidence: 91%

Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification

2018

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Sn-36Bi-22Cu (wt.%) ternary eutectic alloy was prepared using vacuum melting furnace and casting furnace. The samples were directionally solidified upwards solidification rate varying from 8.3 to 166 µm/s and at a constant temperature gradient (4.2 K/mm) in a Bridgman-type directional solidification furnace. The composition analysis of the phases and the intermetallics (Cu 3 Sn and Cu 6 Sn 5 ) were determined from EDX and XRD analysis respectively. The variation of the lamellar spacing (Bi-rich phase) and the Cu 3 Sn phase spacing with the solidification rate were investigated. The dependence of microhardness, ultimate compressive strength and compressive yield strength on solidification rate were determined. The spacing and microhardness were measured from both longitudinal and transverse sections of the samples. The dependence of microhardness on the lamellar spacing and the Cu 3 Sn phase spacing were also determined. The relationships between phase spacings, solidification rate and mechanical properties were determined from linear regression analysis.

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confidence: 91%

Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification

2018

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“…[1][2][3][4][5][6]. Early works have focused on the mechanical properties of Nb\ \Si based superalloys [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Influence of vacancy on structural and elastic properties of NbSi 2 from first-principles calculations

et al. 2016

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“…They are expected to be promising candidate materials for ultrahigh temperatures applications and potentially to replace Ni-based superalloys in high temperature structural applications in future gas turbine engines. [13,14] This damage mode limits the intrinsic toughness of the Nb SS , resulting in a decreased fracture toughness and ductility for Nb-Si based alloy. [9][10][11][12] In typical Nb-Si based alloys, most of the Nb SS phases are body-centered cubic (bcc) structures that usually fail in a cleavage mode.…”

Section: Introductionmentioning

confidence: 99%

Fracture Mode Transition in Nb–1Si Alloys Triggered by Annealing Heat Treatment

et al. 2017

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The concentration of Si plays a crucial role in the ductile‐brittle transition of Nb solid solution (NbSS) alloys, and an appropriate annealing treatment contributes to controlling the Si concentration in NbSS alloy. In this paper, Nb–1Si (at%) alloy is arc‐melted and annealed at different temperature (1300, 1400, and 1500 °C) for 10 h. After annealing, both the strength and ductility increase. Particularly, after annealing at 1300 °C, the fracture feature transforms from cleavage to dimples, and the alloy possesses good strength and retains decent ductility due to the low Si concentration and small‐sized intragranular Nb3Si particles precipitating in the NbSS. The significant effect of annealing on the fracture mechanism of Nb–1Si provides guidance for the design of Nb–Si based alloys.

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Microstructure evolution and mechanical properties of Nb–Si based alloy processed by electromagnetic cold crucible directional solidification

Cited by 69 publications

References 24 publications

Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification

Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification

Influence of vacancy on structural and elastic properties of NbSi 2 from first-principles calculations

Fracture Mode Transition in Nb–1Si Alloys Triggered by Annealing Heat Treatment

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