The effects of cooling rate on microstructure formation during solidification of 319 alloy
Izabel da Penha Gomes, André Barros, Gabriela Lujan Brollo, Cássio Augusto Pinto da Silva, Noé Cheung, Eugênio José Zoqui
ARTIGO
Inglês
Agradecimentos: The authors would like to thank the Brazilian research funding agencies FAPESP (Sa˜o Paulo Research Foundation – projects 2009/08478-1, 2013/09961-3, 2015/22143-3, 2021/11439-0 and 2022/05050-5), CNPq (National Council for Scientific and Technological Development—projects...
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Agradecimentos: The authors would like to thank the Brazilian research funding agencies FAPESP (Sa˜o Paulo Research Foundation – projects 2009/08478-1, 2013/09961-3, 2015/22143-3, 2021/11439-0 and 2022/05050-5), CNPq (National Council for Scientific and Technological Development—projects 470572/2011-6 and 140918/2018-3) and CAPES (Federal Agency for the Support and Improvement of Higher Education – notice 23/2016, ref. no. 88881.131045/2016-01) for providing financial support for this study. The authors are also indebted to the Faculty of Mechanical Engineering at the University of Campinas for the practical support very kindly provided
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Abstract: This work assesses the effect of cooling rate (T\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt}...
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Abstract: This work assesses the effect of cooling rate (T\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\dot{T}$$\end{document}) on the solidification kinetics and microstructural evolution of a 319 aluminum alloy with and without the addition of Al-5 wt%Ti-1wt%B grain refiner. Directionally solidified samples were produced under various cooling rates (from 0.05 to 40 degrees C/s). Microstructure coarsening was then quantitatively analyzed by measuring grain size (GS) and primary (lambda 1), secondary (lambda 2) and average (lambda L) dendrite arm spacing. The results show that polarized optical images can be used to identify dendrite fragments between neighboring primary dendrites, allowing a more accurate microstructural analysis after the addition of grain refiner. The results also show that, for a given T\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\dot{T}$$\end{document}, although GS is reduced after the addition of grain refiner, the respective values of lambda 1, lambda 2 and lambda L remain practically the same. In other words, the grain refiner only affects nucleation and not grain growth. Experimental growth equations are proposed to represent this behavior. Furthermore, lambda L is shown to be a good parameter for evaluating microstructural refinement
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FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2009/08478-1; 2013/09961-3; 2015/22143-3; 2021/11439-0; 2022/05050-5
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
470572/2011-6; 140918/2018-3
COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
88881.131045/2016-01
Aberto
The effects of cooling rate on microstructure formation during solidification of 319 alloy
Izabel da Penha Gomes, André Barros, Gabriela Lujan Brollo, Cássio Augusto Pinto da Silva, Noé Cheung, Eugênio José Zoqui
The effects of cooling rate on microstructure formation during solidification of 319 alloy
Izabel da Penha Gomes, André Barros, Gabriela Lujan Brollo, Cássio Augusto Pinto da Silva, Noé Cheung, Eugênio José Zoqui
Fontes
International journal of metalcasting (Fonte avulsa) |