A novel medium heavy alloy (MHA) with excellent static/dynamic properties and impact toughness

Y. Li, G. Q. Liu, X. B. Hu*, L. H. Wu, C. W. Tan, Vinayak P. Dravid, S. Z. Liu

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Conventional tungsten heavy alloys (WHAs) fabricated using powder metallurgic method exhibit a much lower strength than ultrahigh strength steels (UHSSs). Here, we first time designed a novel medium heavy alloy (MHA) of 57Ni-37W-5Co-1Ta fabricated using the casting technology. Compared to WHA, this MHA not only largely reduces the difficulty in manufacturing and post working, but also enhances the toughness by ~10 times together with excellent quasi-static and dynamic properties. The superior strength-toughness is attributed to the face-centered cubic (FCC) matrix and/or the nano-sized secondary phases. While the superior dynamic performance is attributed to the widening of adiabatic shear bands (ASBs).

Original languageEnglish (US)
Pages (from-to)311-315
Number of pages5
JournalScripta Materialia
Volume162
DOIs
StatePublished - Mar 15 2019

Keywords

  • Dynamic properties
  • Impact toughness
  • Medium heavy alloys (MHAs)
  • Tungsten heavy alloys (WHAs)
  • Ultra high strength steels (UHSSs)

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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