THE MICROSTRUTURE AND COMPRESSIVE PROPERTIES OF ARC–MELTED FeNb ALLOYS

doi:10.3724/SP.J.1037.2011.00113

Acta Metall Sin

2011, Vol. 47

Issue (8): 1032-1037 DOI: 10.3724/SP.J.1037.2011.00113

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THE MICROSTRUTURE AND COMPRESSIVE PROPERTIES OF ARC–MELTED FeNb ALLOYS

LÜ Baochen, TAN Lin , XUE Weihua, SHI Haifang, REN Xin, LI Heliang

Materials Science & Engineering School, Liaoning Science Technology University, Fuxin 123000

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Lü Baochen TAN Lin XUE Weihua SHI Haifang REN Xin LI Heliang. THE MICROSTRUTURE AND COMPRESSIVE PROPERTIES OF ARC–MELTED FeNb ALLOYS. Acta Metall Sin, 2011, 47(8): 1032-1037.

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Abstract The microstructures and compressive properties of arc–melted Fe_100−xNb_x(x=6, 9,12, 15, 17) alloys, which are relevant to eutectic reaction (L → α–Fe+Fe₂Nb), were investigated by SEM, XRD and test machine system 810 (TMS 810). The results showed that the microstructure of the ingot sample consisted of primary phase (α–Fe or Fe₂Nb) and sub–micro–sized eutectics. Fe₉₁Nb₉alloy had the best comprehensive properties with ultimate strength about 1.63 GPa, yield strength about 1.04 GPa and compressive strain ductility about 23%. For alloy Fe₉₁Nb₉, the substitution of Hf element for Nb element produced no observable effects on both the microstructure and the compressive mechanical properties; while the substitution of Y element for Fe element resulted in obvious change in the microstructure and dramatic deterioration in the mechanical properties.

Key words: FeNb alloy arc–melting compessive properties microstructure

Received: 07 March 2011

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Supported by Science Foundation for Doctorae Research from Liaoning Science Technology Universuty (No.09416)

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00113 OR https://www.ams.org.cn/EN/Y2011/V47/I8/1032

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