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Conference Paper: Development of a τ-type Mg-Zn-Al alloy: An investigation of the microstructure and solidification characteristics

TitleDevelopment of a τ-type Mg-Zn-Al alloy: An investigation of the microstructure and solidification characteristics
Authors
KeywordsPhase diagram
ZA alloys
Mg-Zn-Al
Solidification
Issue Date2007
Citation
Materials Science Forum, 2007, v. 546-549, n. PART 1, p. 123-128 How to Cite?
AbstractThe practical phase constituent diagram has been used to determine the composition of a low alloying τ-type Mg-Zn-Al alloy, which has a nominal element content of 7wt%Zn and 3wt%Al (ZA73), as a basis for further improvement oft-type alloy through appropriate thermal processing and micro-alloying. The microstructure and solidification characteristics of the alloy have been experimentally examined using optical microscopy, scanning electron microscopy, X-ray diffraction, and differential scanning calorimetry analysis. The results confirm that the as-microstructure of ZA73 alloy consists of globular equiaxed dendrite with t phase as the only secondary phase evenly distributed in interdendritic spacing. Solidification sequence has been proposed with the help of DSC analysis and Mg-Zn-Al ternary liquidus projection phase diagram. Consistent with previous observed results for t-type Mg-Zn-Al alloy, due to the decrease of element contents, ZA73 alloy has higher liquidus temperature (∼627°C) and wider solidification range (∼283°C), while at the mean time lower starting temperature of the second phase transformation (∼354°C), compared to higher element containing ZA104 alloy. The phase constituent diagram has been shown to be a practical and effective tool for predicting the as-cast microstructural constituent of high zinc Mg-Zn-Al alloys under normal permanent mould solidification condition.
Persistent Identifierhttp://hdl.handle.net/10722/262922
ISSN
2023 SCImago Journal Rankings: 0.195

 

DC FieldValueLanguage
dc.contributor.authorZhang, Jing-
dc.contributor.authorPan, Fusheng-
dc.contributor.authorGuo, Z. X.-
dc.date.accessioned2018-10-08T09:28:49Z-
dc.date.available2018-10-08T09:28:49Z-
dc.date.issued2007-
dc.identifier.citationMaterials Science Forum, 2007, v. 546-549, n. PART 1, p. 123-128-
dc.identifier.issn0255-5476-
dc.identifier.urihttp://hdl.handle.net/10722/262922-
dc.description.abstractThe practical phase constituent diagram has been used to determine the composition of a low alloying τ-type Mg-Zn-Al alloy, which has a nominal element content of 7wt%Zn and 3wt%Al (ZA73), as a basis for further improvement oft-type alloy through appropriate thermal processing and micro-alloying. The microstructure and solidification characteristics of the alloy have been experimentally examined using optical microscopy, scanning electron microscopy, X-ray diffraction, and differential scanning calorimetry analysis. The results confirm that the as-microstructure of ZA73 alloy consists of globular equiaxed dendrite with t phase as the only secondary phase evenly distributed in interdendritic spacing. Solidification sequence has been proposed with the help of DSC analysis and Mg-Zn-Al ternary liquidus projection phase diagram. Consistent with previous observed results for t-type Mg-Zn-Al alloy, due to the decrease of element contents, ZA73 alloy has higher liquidus temperature (∼627°C) and wider solidification range (∼283°C), while at the mean time lower starting temperature of the second phase transformation (∼354°C), compared to higher element containing ZA104 alloy. The phase constituent diagram has been shown to be a practical and effective tool for predicting the as-cast microstructural constituent of high zinc Mg-Zn-Al alloys under normal permanent mould solidification condition.-
dc.languageeng-
dc.relation.ispartofMaterials Science Forum-
dc.subjectPhase diagram-
dc.subjectZA alloys-
dc.subjectMg-Zn-Al-
dc.subjectSolidification-
dc.titleDevelopment of a τ-type Mg-Zn-Al alloy: An investigation of the microstructure and solidification characteristics-
dc.typeConference_Paper-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.4028/www.scientific.net/MSF.546-549.123-
dc.identifier.scopuseid_2-s2.0-38349119681-
dc.identifier.volume546-549-
dc.identifier.issuePART 1-
dc.identifier.spage123-
dc.identifier.epage128-
dc.identifier.issnl0255-5476-

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