Phase field modeling of beta1 precipitation in WE54 alloy

Yipeng Gao, Hong Liu, Rongpei Shi, Ning Zhou, Zheng Long Xu, Jian Feng Nie, Y Wang

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

2 Citations (Scopus)


WE54 (Mg-5wt Y-2w1 Nd-2wt HRE), which has high strength and lightweight at elevated temperatures, has been identified as one of the most successful magnesium alloys. The strength of WF54 can be achieved via precipitation strengthening by aging at 150-250?C during which precipitations of intermediate phases ? 1 and ? and equilibrium phase ? take place. In order to understand the microstructure evolution of ? 1 phase and its effects on dislocation gliding, a phase field model of ? 1 precipitation has been developed. Model inputs, including lattice parameters, precipitate-matrix orientation relationship, elastic constants and free energy data, are obtained from experimental characterization, ab initio calculations and thermodynamic databases. Through computer simulations, the equilibrium shape and spatial distribution of the ? 1 precipitates are quantitatively determined. The interactions between precipitates and gliding basal dislocations and corresponding effects on the strength of the alloy have been investigated.
Original languageEnglish
Title of host publicationMagnesium Technology 2012 - Held During TMS 2012 Annual Meeting and Exhibition
Subtitle of host publicationOrlando, Florida, USA; March 11-15, 2012
EditorsSuveen N Mathaudhu, Wim H Sillekens, Neale R Neelameggham, Norbert Hort
Place of PublicationHoboken NJ USA
PublisherJohn Wiley & Sons
Pages377 - 382
Number of pages6
ISBN (Electronic)9781118359228
ISBN (Print)9781118291214
Publication statusPublished - 2012
EventMagnesium Technology Symposium 2012 - Orlando, United States of America
Duration: 11 Mar 201215 Mar 2012 (Proceedings front matter)


ConferenceMagnesium Technology Symposium 2012
CountryUnited States of America
Internet address

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