Development of magnesium-rare earth die-casting alloys

Mark Easton, Mark A. Gibson, Suming Zhu, Trevor Abbott, Jian Feng Nie, Colleen J. Bettles, Gary Savage

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

6 Citations (Scopus)

Abstract

An overview of the development of a high-performance Mg–RE based alloy, HP2+, is presented, which has a good combination of die-castability and mechanical properties at ambient and elevated temperatures. The original alloy, HP2, was a die-casing version of the sand-cast alloy SC1 developed for powertrain applications. However, HP2 tended to crack substantially, leading to unusable castings due to its high Nd content. It was found that the solidification path of Mg–RE alloys can be engineered to reduce the propensity to hot tearing by changing the mixture of RE elements towards La-rich, which leads to an increase in the amount of eutectic and a reduction of the solidification range. Precipitate-forming RE elements, such as Nd or Y, were optimized for HP2+ to meet the requirement for high temperature creep resistance. Whilst some challenges remain with the commercial application of HP2+, the learnings from the alloy design process can be applied to other alloy development programs.

Original languageEnglish
Title of host publicationMagnesium Technology 2018
EditorsKiran N. Solanki, Vineet Joshi, Neale R. Neelameggham, Dmytro Orlov
PublisherSpringer
Pages329-336
Number of pages8
ISBN (Print)9783319723310
DOIs
Publication statusPublished - 2018
EventMagnesium Technology Symposium 2018 - Phoenix, United States of America
Duration: 11 Mar 201815 Mar 2018
https://link.springer.com/book/10.1007/978-3-319-72332-7 (Proceedings)

Publication series

NameMinerals, Metals and Materials Series
VolumePart F7
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

ConferenceMagnesium Technology Symposium 2018
CountryUnited States of America
CityPhoenix
Period11/03/1815/03/18
Internet address

Keywords

  • Creep resistance
  • High-pressure die-casting
  • Hot tearing
  • Mg–RE alloys

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