Effects of macrosegregation and microstructure on the corrosion resistance and hardness of a directionally solidified Zn-5.0wt.%Mg alloy
T.A. Vida, T. Soares, R.S. Septimio, C.C. Brito, N. Cheung, A. Garcia
ARTIGO
Inglês
Agradecimentos: The authors thank the financial support provided by: São Paulo Research Foundation - FAPESP (Grants: 2012/08494-0, 2013/15478-3, 2013/25452-1, 2013/23396-7, 2014/50502-5), National Council for Scientific and Technological Development - CNPq (155863/2013-4, Project i-link0944,...
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Agradecimentos: The authors thank the financial support provided by: São Paulo Research Foundation - FAPESP (Grants: 2012/08494-0, 2013/15478-3, 2013/25452-1, 2013/23396-7, 2014/50502-5), National Council for Scientific and Technological Development - CNPq (155863/2013-4, Project i-link0944, 166912/2017-4), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brazil - Capes (Funding Code 001), CNPEM and LNNano for the use of the XRD equipment. The authors thank Espaço da Escrita - Pró Reitoria de Pesquisa - UNICAMP- for the language services provided
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This study aims to analyze the influence of macrosegregation on microstructure evolution, and of microstructure length scale on the corrosion resistance of a Zn-5.0wt.%Mg alloy casting. The analyzed samples were taken along the length of castings unidirectionally solidified in unsteady state...
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This study aims to analyze the influence of macrosegregation on microstructure evolution, and of microstructure length scale on the corrosion resistance of a Zn-5.0wt.%Mg alloy casting. The analyzed samples were taken along the length of castings unidirectionally solidified in unsteady state conditions of heat extraction. Microstructure characterization, microhardness, linear polarization and electrochemical impedance spectroscopy (EIS) tests were performed. A unique type of microstructure was observed, characterized essentially by a morphology typified by idiomorphic MgZn2 crystals in a “complex eutectic mixture” [coexistence of stable (Zn+Mg2Zn11) and metastable (Zn+MgZn2) eutectics]. The correlation between thermal and microstructural parameters, permitted experimental growth laws, correlating the evolution of the lamellar eutectic spacing with the cooling rate to be established. Vickers microhardness and electrochemical corrosion tests showed that more refined microstructures associated with higher experimental cooling rates, are related to a better set of higher hardness and corrosion resistance
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
155863/2013-4; 166912/2017-4
COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
001
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2012/08494-0; 2013/15478-3; 2013/25452-1; 2013/23396-7; 2014/50502-5
Aberto
Cheung, Noé, 1974-
Autor
Garcia, Amauri, 1949-
Autor
Effects of macrosegregation and microstructure on the corrosion resistance and hardness of a directionally solidified Zn-5.0wt.%Mg alloy
T.A. Vida, T. Soares, R.S. Septimio, C.C. Brito, N. Cheung, A. Garcia
Effects of macrosegregation and microstructure on the corrosion resistance and hardness of a directionally solidified Zn-5.0wt.%Mg alloy
T.A. Vida, T. Soares, R.S. Septimio, C.C. Brito, N. Cheung, A. Garcia
Fontes
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Materials research. Ibero-american journal of materials Vol. 22, supl 1 (2019), n. art. e20190009 |