Primary and secondary precipitates in a hierarchical-precipitate-strengthened ferritic alloy

Gian Song, Zhiqian Sun, Jonathan D. Poplawsky, Xiandong Xu, Mingwei Chen, Peter K. Liaw

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    The microstructures of a hierarchical-precipitate-strengthened ferritic alloy are characterized, using transmission-electron microscopy (TEM) and atom-probe tomography (APT). The alloy shows duplex precipitates. The primary precipitate with an average edge length of 90 nm consists of NiAl- and Ni2TiAl-type phases, while the secondary precipitate with an average radius of 2 nm is a NiAl-type phase. Based on the APT results, the volume fractions of the primary and secondary precipitates were calculated, using the lever rule to be 17.3 and 2.3%, respectively.

    Original languageEnglish
    Pages (from-to)584-588
    Number of pages5
    JournalJournal of Alloys and Compounds
    Volume706
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Atom probe tomography
    • Ferritic steels
    • Heusler phases
    • Precipitation
    • Transmission electron microscopy (TEM)

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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