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

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

Research output: Contribution to journalArticle

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

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toughness
dynamic characteristics
Fracture toughness
Toughness
Tungsten
Shear bands
Steel
X ray powder diffraction
tungsten
Casting
manufacturing
steels
shear
matrices

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

Cite this

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title = "A novel medium heavy alloy (MHA) with excellent static/dynamic properties and impact toughness",
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).",
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author = "Y. Li and Liu, {G. Q.} and Xiaobing Hu and Wu, {L. H.} and Tan, {C. W.} and Dravid, {Vinayak P} and Liu, {S. Z.}",
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month = "3",
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A novel medium heavy alloy (MHA) with excellent static/dynamic properties and impact toughness. / Li, Y.; Liu, G. Q.; Hu, Xiaobing; Wu, L. H.; Tan, C. W.; Dravid, Vinayak P; Liu, S. Z.

In: Scripta Materialia, Vol. 162, 15.03.2019, p. 311-315.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A novel medium heavy alloy (MHA) with excellent static/dynamic properties and impact toughness

AU - Li, Y.

AU - Liu, G. Q.

AU - Hu, Xiaobing

AU - Wu, L. H.

AU - Tan, C. W.

AU - Dravid, Vinayak P

AU - Liu, S. Z.

PY - 2019/3/15

Y1 - 2019/3/15

N2 - 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).

AB - 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).

KW - Dynamic properties

KW - Impact toughness

KW - Medium heavy alloys (MHAs)

KW - Tungsten heavy alloys (WHAs)

KW - Ultra high strength steels (UHSSs)

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