Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-B
The microstructural evolution and corresponding phase transformations have been investigated during partial remelting of AZ91D magnesium alloy refined by Al-Ti-B master alloy. The effect of heating temperature on semisolid microstructure has also been discussed. The results indicate that the microst...
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2011-12-01
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Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392011000400018 |
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doaj-cfbe8813e7a144ae8a241f3750ca9eb62020-11-25T00:15:27ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392011-12-01144532540Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-BTi Jun ChenRui Quan WangYing MaYuan HaoThe microstructural evolution and corresponding phase transformations have been investigated during partial remelting of AZ91D magnesium alloy refined by Al-Ti-B master alloy. The effect of heating temperature on semisolid microstructure has also been discussed. The results indicate that the microstructural evolution process includes four stages, the initial rapid coarsening, structure separation, spheroidization accompanied by coarsening and the final coarsening. Two or more equiaxed dendrites in the as-cast microstructure evolve into one spheroidal primary particle in the semisolid microstructure through the former three stages. The initial rapid coarsening results from the reaction of β→α, the structure separation is due to the α + β→L and α→L, the spheroidization is attributed to the α→L and the final coarsening is ascribed to the two reverse reactions of α→L and L→α. Rising the heating temperature during partial remelting is beneficial for obtaining small and spheroidal primary particles.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392011000400018AZ91D magnesium alloythixoformingsemisolid microstructurephase transformation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ti Jun Chen Rui Quan Wang Ying Ma Yuan Hao |
spellingShingle |
Ti Jun Chen Rui Quan Wang Ying Ma Yuan Hao Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-B Materials Research AZ91D magnesium alloy thixoforming semisolid microstructure phase transformation |
author_facet |
Ti Jun Chen Rui Quan Wang Ying Ma Yuan Hao |
author_sort |
Ti Jun Chen |
title |
Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-B |
title_short |
Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-B |
title_full |
Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-B |
title_fullStr |
Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-B |
title_full_unstemmed |
Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-B |
title_sort |
semisolid microstructure evolution of az91d magnesium alloy refined by al-ti-b |
publisher |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
series |
Materials Research |
issn |
1516-1439 |
publishDate |
2011-12-01 |
description |
The microstructural evolution and corresponding phase transformations have been investigated during partial remelting of AZ91D magnesium alloy refined by Al-Ti-B master alloy. The effect of heating temperature on semisolid microstructure has also been discussed. The results indicate that the microstructural evolution process includes four stages, the initial rapid coarsening, structure separation, spheroidization accompanied by coarsening and the final coarsening. Two or more equiaxed dendrites in the as-cast microstructure evolve into one spheroidal primary particle in the semisolid microstructure through the former three stages. The initial rapid coarsening results from the reaction of β→α, the structure separation is due to the α + β→L and α→L, the spheroidization is attributed to the α→L and the final coarsening is ascribed to the two reverse reactions of α→L and L→α. Rising the heating temperature during partial remelting is beneficial for obtaining small and spheroidal primary particles. |
topic |
AZ91D magnesium alloy thixoforming semisolid microstructure phase transformation |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392011000400018 |
work_keys_str_mv |
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