Microstructure and mechanical properties of directionally solidified and heat treated Nb–14Si–24Ti–2Cr alloy

Wang, L G; Weng, J.; Guan, Kai; Su, Lijuan; Zhang, H

doi:10.1179/1433075x12y.0000000017

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…The EDS data proved that Cr atoms all existed in Nb SS . 20 In addition, by comparing the area of Nb 5 Si 3 zones and the Nb 3 Si zones in Fig. 6 with the area of Nb 3 Si (surrounded by green polygons in Fig.…”

Section: Effect Of Cr Addition On Microstructurementioning

confidence: 99%

Synergy of Cr concentration and withdraw rate on microstructure evolution of directionally solidified Nb–14Si–24Ti alloys

Guan

Chen

Weng

et al. 2014

Materials Science and Technology

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The synergy of Cr concentration and withdraw rate on the microstructure of directionally solidified and heat treated Nb–14Si–24Ti– xCr ( x = 0, 2, 8, 10, 14 at-) alloys was investigated. The phases present in the directionally solidified alloys were sensitive to Cr concentration and withdraw rate. The addition of Cr changed the solidification path of ternary alloys. High Cr concentration stabilised the Nb5Si3 and facilitated the formation of Cr2Nb during the directional solidification process. However, the effect of Cr was suppressed by the increase in withdraw rate. The competition between the effect of Cr addition and withdraw rate determined the microstructure of alloys and resulted in a four-phase microstructure. During heat treatment, the Nb3Si phases in Nb–14Si–24Ti–0Cr alloys were stable, while in the Cr contained alloys, the Nb3Si decomposed into NbSS/Nb5Si3 eutectoid through the eutectoid reaction (Nb3Si→NbSS+Nb5Si3).

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Section: Effect Of Cr Addition On Microstructurementioning

confidence: 99%