Processing and characterization of spark plasma sintered TZM alloy

Can Burak Danisman, Baris Yavas, Onuralp Yucel, Filiz Sahin, Gultekin Goller*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

55 Citations (Scopus)

Abstract

TZM is one of the most important molybdenum based alloys having a nominal composition of Mo–0.5 Ti–0.1 Zr–0.02 C (wt. %). This alloy possesses high temperature strength, high creep resistance, low coefficient of thermal expansion, and high thermal conductivity. TZM alloy processed contains TiC, ZrC and complex carbides which inhibit recrystallization at high temperatures improving its performances at harsh conditions. In this study pre-alloyed TZM powder was sintered by spark plasma sintering (SPS) at various sintering temperatures, holding times and pressures to investigate the effect of sintering conditions on densification, microstructure and hardness. In all cases, TiC and ZrC precipitations was observed throughout the microstructure. The average sizes of precipitates were measured as 7.5 and 3.5 μm for TiC and ZrC, respectively. The sample sintered at 1450 °C under 80 MPa for 150 s showed optimum properties as 95.5% of relative density, 8.5 ± 2 μm of average grain size, 2.04 ± 0.03 GPa of hardness, and 25.95 ± 3 MPa m1/2fracture toughness.

Original languageEnglish
Pages (from-to)860-868
Number of pages9
JournalJournal of Alloys and Compounds
Volume685
DOIs
Publication statusPublished - 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Funding

This work was supported by Scientific Research Project Funds of Istanbul Technical University (Project Number: 38683). The authors thank H. H. Sezer for SEM studies.

FundersFunder number
Istanbul Teknik Üniversitesi38683

    Keywords

    • Molybdenum
    • Refractory metals
    • Sintering
    • SPS
    • TZM alloy

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