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effect of zirconium addition on the phase transformations in as-cast and heat-treated ti–zr–si–b alloys.pdf

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effect of zirconium addition on the phase transformations in as-cast and heat-treated ti–zr–si–b alloys

Journal of Alloys and Compounds 601 (2014) 94–99 Contents lists available at ScienceDirect Journal of Alloys and Compounds journal homepag e: www.elsevier.c om/locate/jalcom Effect of zirconium addition on the phase transformations in as-cast and heat-treated Ti–Zr–Si–B alloys Alfeu Saraiva Ramos a,⇑, Carlos Angelo Nunes b, Geovani Rodrigues c, Erika Coaglia Trindade Ramos a a Universidade Federal de Alfenas, Instituto de Ciência e Tecnologia, Rodovia José Aurélio Vilela, 11999, 37715-400 Poços de Caldas, MG, Brazil b Universidade de São Paulo, Departamento de Engenharia de Materiais, Polo Urbo-Industrial, Gleba AI-6, Mondesir, s/n, Polo Urbo-Industrial Gleba AI-6, 12600-970 Lorena, SP, Brazil c Universidade Federal de Itajubá, Instituto de Engenharia Mecânica, Avenida BPS, 1303, Pinheirinho, 37500-903 Itajubá, MG, Brazil a r t i c l e i n f o a b s t r a c t Article history: This work reports on effect of zirconium addition on the phase transformations in as-cast and heat-trea- Received 25 April 2013 ted Ti–6.7Zr–22.2Si–11.1B, Ti–7Zr–15Si–7.5B, Ti–7Zr–10Si–5B, Ti–7Zr–7.5Si–15B and Ti–7Zr–30Si–5B Received in revised form 8 February 2014 alloys (at.%). After arc melting, these Ti–Zr–Si–B alloys were heat-treated at 1200 C for 90 h. Samples Accepted 27 February 2014 of as-cast and heat-treated Ti–Zr–Si–B alloys were evaluated by X-ray diffraction, scanning electron Available online 12 March 2014 microscopy, energy dispersive spectrometry, and wavelengt