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

doi:10.1016/j.scriptamat.2018.11.036

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 journal › Article

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 language	English (US)
Pages (from-to)	311-315
Number of pages	5
Journal	Scripta Materialia
Volume	162
DOIs	https://doi.org/10.1016/j.scriptamat.2018.11.036
State	Published - 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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Li, Y., Liu, G. Q., Hu, X. B., Wu, L. H., Tan, C. W., Dravid, V. P., & Liu, S. Z. (2019). A novel medium heavy alloy (MHA) with excellent static/dynamic properties and impact toughness. Scripta Materialia, 162, 311-315. https://doi.org/10.1016/j.scriptamat.2018.11.036

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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).",

keywords = "Dynamic properties, Impact toughness, Medium heavy alloys (MHAs), Tungsten heavy alloys (WHAs), Ultra high strength steels (UHSSs)",

author = "Y. Li and Liu, {G. Q.} and Hu, {X. B.} and Wu, {L. H.} and Tan, {C. W.} and Dravid, {Vinayak P.} and Liu, {S. Z.}",

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AU - Li, Y.

AU - Liu, G. Q.

AU - Hu, X. B.

AU - Wu, L. H.

AU - Tan, C. W.

AU - Dravid, Vinayak P.

AU - Liu, S. Z.

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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).

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KW - Impact toughness

KW - Medium heavy alloys (MHAs)

KW - Tungsten heavy alloys (WHAs)

KW - Ultra high strength steels (UHSSs)

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