Development of high-strength Co-free high-entropy alloys hardened by nanosized precipitates

Y.L. Zhao; T. Yang; J.H. Zhu; D. Chen; Y. Yang; A. Hu; C.T. Liu; J.-J. Kai

doi:10.1016/j.scriptamat.2018.01.028

Development of high-strength Co-free high-entropy alloys hardened by nanosized precipitates

Y.L. Zhao
, T. Yang
, J.H. Zhu
, D. Chen
, Y. Yang
, A. Hu
, C.T. Liu
, J.-J. Kai^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

259 Citations (Scopus)

Abstract

A series of novel Co-free high-entropy alloys (HEAs) were developed by engineering nanoprecipitation in Fe-Ni-Cr-Mn-Al-Ti system, which exhibit a good combination of low cost, high strength and good ductility. The effects of Ti/Al ratio (from 0.6 to 1.7) on phase structures and mechanical properties were carefully investigated. Specifically, the alloy with a high Ti/Al ratio of 1.7 gives a high tensile strength of 1.25 GPa with a good ductility over 20 %, obviously outperforming other Co-free HEAs. The strain-hardening behaviors and deformation micro-mechanisms were analyzed by transmission electron microscope, which reveals the structural origins of their superior mechanical properties.

Original language	English
Pages (from-to)	51-55
Journal	Scripta Materialia
Volume	148
Online published	9 Feb 2018
DOIs	https://doi.org/10.1016/j.scriptamat.2018.01.028
Publication status	Published - 15 Apr 2018

Research Keywords

High-entropy alloys
Mechanical properties
Microstructures
Precipitation strengthening

RGC Funding Information

RGC-funded

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10.1016/j.scriptamat.2018.01.028

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Cite this

@article{edb488dfb3264ee6a49aa91ee3ffeff2,

title = "Development of high-strength Co-free high-entropy alloys hardened by nanosized precipitates",

abstract = "A series of novel Co-free high-entropy alloys (HEAs) were developed by engineering nanoprecipitation in Fe-Ni-Cr-Mn-Al-Ti system, which exhibit a good combination of low cost, high strength and good ductility. The effects of Ti/Al ratio (from 0.6 to 1.7) on phase structures and mechanical properties were carefully investigated. Specifically, the alloy with a high Ti/Al ratio of 1.7 gives a high tensile strength of 1.25 GPa with a good ductility over 20 \%, obviously outperforming other Co-free HEAs. The strain-hardening behaviors and deformation micro-mechanisms were analyzed by transmission electron microscope, which reveals the structural origins of their superior mechanical properties.",

keywords = "High-entropy alloys, Mechanical properties, Microstructures, Precipitation strengthening",

author = "Y.L. Zhao and T. Yang and J.H. Zhu and D. Chen and Y. Yang and A. Hu and C.T. Liu and J.-J. Kai",

year = "2018",

month = apr,

day = "15",

doi = "10.1016/j.scriptamat.2018.01.028",

language = "English",

volume = "148",

pages = "51--55",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Development of high-strength Co-free high-entropy alloys hardened by nanosized precipitates

AU - Zhao, Y.L.

AU - Yang, T.

AU - Zhu, J.H.

AU - Chen, D.

AU - Yang, Y.

AU - Hu, A.

AU - Liu, C.T.

AU - Kai, J.-J.

PY - 2018/4/15

Y1 - 2018/4/15

N2 - A series of novel Co-free high-entropy alloys (HEAs) were developed by engineering nanoprecipitation in Fe-Ni-Cr-Mn-Al-Ti system, which exhibit a good combination of low cost, high strength and good ductility. The effects of Ti/Al ratio (from 0.6 to 1.7) on phase structures and mechanical properties were carefully investigated. Specifically, the alloy with a high Ti/Al ratio of 1.7 gives a high tensile strength of 1.25 GPa with a good ductility over 20 %, obviously outperforming other Co-free HEAs. The strain-hardening behaviors and deformation micro-mechanisms were analyzed by transmission electron microscope, which reveals the structural origins of their superior mechanical properties.

AB - A series of novel Co-free high-entropy alloys (HEAs) were developed by engineering nanoprecipitation in Fe-Ni-Cr-Mn-Al-Ti system, which exhibit a good combination of low cost, high strength and good ductility. The effects of Ti/Al ratio (from 0.6 to 1.7) on phase structures and mechanical properties were carefully investigated. Specifically, the alloy with a high Ti/Al ratio of 1.7 gives a high tensile strength of 1.25 GPa with a good ductility over 20 %, obviously outperforming other Co-free HEAs. The strain-hardening behaviors and deformation micro-mechanisms were analyzed by transmission electron microscope, which reveals the structural origins of their superior mechanical properties.

KW - High-entropy alloys

KW - Mechanical properties

KW - Microstructures

KW - Precipitation strengthening

UR - https://www.scopus.com/pages/publications/85041455401

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85041455401&origin=recordpage

U2 - 10.1016/j.scriptamat.2018.01.028

DO - 10.1016/j.scriptamat.2018.01.028

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 148

SP - 51

EP - 55

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Development of high-strength Co-free high-entropy alloys hardened by nanosized precipitates

Abstract

Research Keywords

RGC Funding Information

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GRF: Advanced Nuclear Structural Materials Development for the Next Generation Reactor Applications

GRF: Lattice Distortion and Solid-solution Hardening of Multi-component Alloys with Equiatomic Compositions

Cite this

Development of high-strength Co-free high-entropy alloys hardened by nanosized precipitates

Abstract

Research Keywords

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

GRF: Advanced Nuclear Structural Materials Development for the Next Generation Reactor Applications

GRF: Lattice Distortion and Solid-solution Hardening of Multi-component Alloys with Equiatomic Compositions

Cite this