WFRF:(Cui Xin)
Sökning: WFRF:(Cui Xin) > Phase transformatio...
- Xin, TongzhengUniv New South Wales, Australia (författare)
Phase transformations in an ultralight BCC Mg alloy during anisothermal ageing
- Artikel/kapitelEngelska2022
Förlag, utgivningsår, omfång ...
- PERGAMON-ELSEVIER SCIENCE LTD,2022
- printrdacarrier
Nummerbeteckningar
- LIBRIS-ID:oai:DiVA.org:liu-189061
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-189061URI
- https://doi.org/10.1016/j.actamat.2022.118248DOI
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- Språk:engelska
- Sammanfattning på:engelska
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Anmärkningar
- Funding Agencies|Australian Research Council (ARC); ARC Discovery scheme [DP190103592]; National Natural Science Foundation of China [52101142]; Natural Science Foundation of Jiangsu Province [BK20200503]; Chinese Scholarship Council (CSC)
- Mg-Li-Al alloys with a body-centred cubic (BCC) structure can exhibit exceptional specific strengths in combination with excellent ductility and corrosion resistance. In general, the strength of these alloys is very sensitive to the processing temperature due to the occurrence of various phase transformations. Although different phases have been identified in these alloys, their corresponding transformation mechanisms and unique role played in controlling the mechanical properties have never been studied in depth. In this work, we identified the phase transformation sequence by in-situ synchrotron X-ray diffraction. Moreover, we investigated the evolution of precipitation and their morphology using transmission and scanning electron microscopy, together with simulations based on the phase field modelling and first-principles calculations. Phase transformation sequence of Al-rich zone?->?theta (D0(3)(-)Mg(3)Al)?->?AlLi was confirmed during anisothermal ageing. A braided structure resulting from spinodal decomposition was found to be the optimized microstructure for achieving the peak strength. Nanocrystalline alpha-Mg phase at the interface between theta and the matrix was identified as the main reason for softening in the alloy. The core-shell model for theta?->?AlLi transformation is observed and verified. Our findings deepen the understanding of BCC Mg-Li-Al alloys and pave a pathway to develop new generation of ultralight alloys with stronger strength and better stability. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Ämnesord och genrebeteckningar
- TEKNIK OCH TEKNOLOGIER Materialteknik Metallurgi och metalliska material hsv//swe
- ENGINEERING AND TECHNOLOGY Materials Engineering Metallurgy and Metallic Materials hsv//eng
- Phase transformations; Mg alloys
Biuppslag (personer, institutioner, konferenser, titlar ...)
- Tang, SongNanjing Univ Sci & Technol, Peoples R China (författare)
- Ji, FanUniv New South Wales, Australia (författare)
- Cui, LuqingLinköpings universitet,Konstruktionsmaterial,Tekniska fakulteten(Swepub:liu)luqcu85 (författare)
- He, BinbinSouthern Univ Sci & Technol, Peoples R China (författare)
- Lin, XinNorthwestern Polytech Univ, Peoples R China (författare)
- Tian, XiaolinNorth Univ China, Peoples R China (författare)
- Hou, HuaNorth Univ China, Peoples R China; Taiyuan Univ Sci & Technol, Peoples R China (författare)
- Zhao, YuhongNorth Univ China, Peoples R China; Univ Sci & Technol Beijing, Peoples R China (författare)
- Ferry, MichaelUniv New South Wales, Australia (författare)
- Univ New South Wales, AustraliaNanjing Univ Sci & Technol, Peoples R China (creator_code:org_t)
Sammanhörande titlar
- Ingår i:Acta Materialia: PERGAMON-ELSEVIER SCIENCE LTD2391359-64541873-2453
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- Hou, Hua
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