Influences of yttrium content on microstructure and mechanical properties of as-cast Mg–Ca–Y–Zr alloys

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The microstructure and mechanical properties of as-cast Mg–Ca–Y–Zr alloys with different Y contents were investigated. The alloy containing 0.5 wt% Y exhibited finer grains compared to the alloys with higher Y content. All alloys had a dendritic microstructure with eutectics composed of α-Mg and Ca-rich intermetallic phases. Few Mg–Y-rich intermetallic particles were also found along grain boundaries. EDS analysis showed that the solute Y segregated at dendritic and grain boundaries. The amount of Y contained in eutectics remarkably increased with increasing Y. In addition, the eutectics volume fractions of all alloys were comparable but the morphology became less continuous at higher Y contents. Both the room temperature tensile and compressive strengths were largely improved with increasing Y content. Moreover, the elevated temperature compression tests showed that the compressive yield strength first decreased slightly when the temperature rose to 175 °C, but then remained stable as the temperature increased.

Original languageEnglish
Title of host publicationMagnesium Technology 2018
EditorsKiran N. Solanki, Vineet Joshi, Neale R. Neelameggham, Dmytro Orlov
Number of pages7
PublisherSpringer International Publishing
Publication date2018
Pages91-97
ISBN (print)9783319723310, 978-3-319-89171-2
ISBN (electronic)978-3-319-72332-7
DOIs
Publication statusPublished - 2018
Externally publishedYes
EventInternational Symposium on Magnesium Technology 2018 - Phoenix, United States
Duration: 11.03.201815.03.2018

    Research areas

  • Mechanical properties, Mg–Ca–Y–Zr alloy, Microstructure
  • Engineering

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