DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Mechanical behavior and shear band of a powder-metallurgy-fabricated CoCrFeMnNi high-entropy alloy during high strain-rate deformation

Abstract

High-entropy alloys (HEAs) fabricated by powder metallurgy are considered to exhibit extremely-great potential application values in the field for high-speed impact deformation due to their uniform microstructures and compositions. The mechanical behavior of a powder-metallurgy-fabricated (PM) CoCrFeMnNi HEA was investigated at room temperature with strain rates ranging from 1200 s-1 to 2800 s-1. It was found that the serration behavior and shear localization of the alloy under dynamic conditions occurred. Results also indicated that the serrated flow took place in the PM CoCrFeMnNi HEA during mechanical deformation at high strain rates (>1000 s-1) and became more pronounced as the strain rate increased. Furthermore, it was determined that the yield-strength values of the PM CoCrFeMnNi HEA were sensitive to strain rates, where the values increased from 500 MPa to 700 MPa when the strain rates increased from 1200 s-1 to 2800 s-1. Shear bands with a width of about 20 μm were generated in the PM CoCrFeMnNi HEA after the shear stress reached a maximum value of 635 MPa, which corresponded to a nominal strain of about 8.71. Nanotwins and ultrafine-equiaxed grains with a diameter of about 150 nm also developed at the core of the shear band during deformation. The results revealed that the strength of the shear band was much higher than that of the matrix grain. Nanotwins in the shear band were composed of a single face-centered-cubic (FCC) structure with the twin plane of ($$\bar{1}$$1$$\bar1$$), which could be formed via a rotational dynamic recrystallization (RDR).

Authors:
 [1]; ORCiD logo [1];  [1];  [1];  [2];  [2]
  1. Central South University, Changsha (China)
  2. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE; National Natural Science Foundation of China (NSFC); State Key Laboratory of Powder Metallurgy; National Science Foundation (NSF); US Army Research Office (ARO)
OSTI Identifier:
1894194
Grant/Contract Number:  
AC05-00OR22725; 51771231; 52020105013; 62102172; DMR-1611180; 1809640; W911NF-13-1-0438; W911NF-19-2-0049
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Research and Technology
Additional Journal Information:
Journal Volume: 21; Journal ID: ISSN 2238-7854
Publisher:
Brazilian Metallurgical, Materials and Mining Association
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; High-entropy alloy; Powder metallurgy; Mechanical property; Serration behavior; Shear localization

Citation Formats

Li, Wenshu, Wang, Bingfeng, Huang, Xiaoxia, Liu, Bin, Brechtl, Jamieson, and Liaw, Peter K. Mechanical behavior and shear band of a powder-metallurgy-fabricated CoCrFeMnNi high-entropy alloy during high strain-rate deformation. United States: N. p., 2022. Web. doi:10.1016/j.jmrt.2022.09.106.
Li, Wenshu, Wang, Bingfeng, Huang, Xiaoxia, Liu, Bin, Brechtl, Jamieson, & Liaw, Peter K. Mechanical behavior and shear band of a powder-metallurgy-fabricated CoCrFeMnNi high-entropy alloy during high strain-rate deformation. United States. https://doi.org/10.1016/j.jmrt.2022.09.106
Li, Wenshu, Wang, Bingfeng, Huang, Xiaoxia, Liu, Bin, Brechtl, Jamieson, and Liaw, Peter K. Wed . "Mechanical behavior and shear band of a powder-metallurgy-fabricated CoCrFeMnNi high-entropy alloy during high strain-rate deformation". United States. https://doi.org/10.1016/j.jmrt.2022.09.106. https://www.osti.gov/servlets/purl/1894194.
@article{osti_1894194,
title = {Mechanical behavior and shear band of a powder-metallurgy-fabricated CoCrFeMnNi high-entropy alloy during high strain-rate deformation},
author = {Li, Wenshu and Wang, Bingfeng and Huang, Xiaoxia and Liu, Bin and Brechtl, Jamieson and Liaw, Peter K.},
abstractNote = {High-entropy alloys (HEAs) fabricated by powder metallurgy are considered to exhibit extremely-great potential application values in the field for high-speed impact deformation due to their uniform microstructures and compositions. The mechanical behavior of a powder-metallurgy-fabricated (PM) CoCrFeMnNi HEA was investigated at room temperature with strain rates ranging from 1200 s-1 to 2800 s-1. It was found that the serration behavior and shear localization of the alloy under dynamic conditions occurred. Results also indicated that the serrated flow took place in the PM CoCrFeMnNi HEA during mechanical deformation at high strain rates (>1000 s-1) and became more pronounced as the strain rate increased. Furthermore, it was determined that the yield-strength values of the PM CoCrFeMnNi HEA were sensitive to strain rates, where the values increased from 500 MPa to 700 MPa when the strain rates increased from 1200 s-1 to 2800 s-1. Shear bands with a width of about 20 μm were generated in the PM CoCrFeMnNi HEA after the shear stress reached a maximum value of 635 MPa, which corresponded to a nominal strain of about 8.71. Nanotwins and ultrafine-equiaxed grains with a diameter of about 150 nm also developed at the core of the shear band during deformation. The results revealed that the strength of the shear band was much higher than that of the matrix grain. Nanotwins in the shear band were composed of a single face-centered-cubic (FCC) structure with the twin plane of ($\bar{1}$1$\bar1$), which could be formed via a rotational dynamic recrystallization (RDR).},
doi = {10.1016/j.jmrt.2022.09.106},
journal = {Journal of Materials Research and Technology},
number = ,
volume = 21,
place = {United States},
year = {Wed Oct 05 00:00:00 EDT 2022},
month = {Wed Oct 05 00:00:00 EDT 2022}
}

Works referenced in this record:

Mechanical Properties and Serration Behavior of a NiCrFeCoMn High-Entropy Alloy at High Strain Rates
journal, August 2020

  • Liu, Ruoyu; Yao, Xianrui; Wang, Bingfeng
  • Materials, Vol. 13, Issue 17
  • DOI: 10.3390/ma13173722

The influence of strain rate on the microstructure transition of 304 stainless steel
journal, May 2011


Micromechanical Model for Deformation in Solids with Universal Predictions for Stress-Strain Curves and Slip Avalanches
journal, April 2009


High entropy alloys: A focused review of mechanical properties and deformation mechanisms
journal, April 2020


Tensile properties of high- and medium-entropy alloys
journal, August 2013


Microstructure evolution and mechanical properties of intermetallic Ni–xSi (x=5, 10, 15, 20) alloys
journal, July 2012


Formation of Stable Schwarz Crystals in Polycrystalline Copper at the Grain Size Limit
journal, September 2021


Dynamic properties of pultruded natural fibre reinforced composites using Split Hopkinson Pressure Bar technique
journal, October 2010


Microstructural refinement and improvement of mechanical properties of hot-rolled Mg–3Al–Zn alloy sheets subjected to pre-extrusion and Al-Si alloying
journal, April 2018


Microstructural evolution in adiabatic shear localization in stainless steel
journal, March 2003


Constrained minimal-interface structures in polycrystalline copper with extremely fine grains
journal, November 2020


Microstructures and properties of high-entropy alloys
journal, April 2014


Dislocation-based serrated plastic flow of high entropy alloys at cryogenic temperatures
journal, November 2020


Adiabatic shear localization in the CrMnFeCoNi high-entropy alloy
journal, June 2018


Gradient cell–structured high-entropy alloy with exceptional strength and ductility
journal, November 2021


Tuned Critical Avalanche Scaling in Bulk Metallic Glasses
journal, March 2014

  • Antonaglia, James; Xie, Xie; Schwarz, Gregory
  • Scientific Reports, Vol. 4, Issue 1
  • DOI: 10.1038/srep04382

Mechanical Properties and Microstructure of a NiCrFeCoMn High-Entropy Alloy Deformed at High Strain Rates
journal, November 2018

  • Wang, Bingfeng; Yao, Xianrui; Wang, Chu
  • Entropy, Vol. 20, Issue 11
  • DOI: 10.3390/e20110892

High strain-rate compressive deformation behavior of the Al0.1CrFeCoNi high entropy alloy
journal, December 2015


Multiple deformation mechanisms induced by pre-twinning in CoCrFeNi high entropy alloy
journal, January 2022


Critical stress for twinning nucleation in CrCoNi-based medium and high entropy alloys
journal, May 2018


Serration and noise behaviors in materials
journal, October 2017


Dynamic recrystallization induced by plastic deformation at high strain rate in a Monel alloy
journal, January 2000


Analysis of complex time series using refined composite multiscale entropy
journal, April 2014


Mechanical properties and microstructure of laser welded FeCoNiCrMn high-entropy alloy
journal, March 2020


Mechanical properties of the high-entropy alloy Ag 0.5 CoCrCuFeNi at temperatures of 4.2–300 K
journal, July 2013

  • Laktionova, M. A.; Tabchnikova, E. D.; Tang, Z.
  • Low Temperature Physics, Vol. 39, Issue 7
  • DOI: 10.1063/1.4813688

History-independent cyclic response of nanotwinned metals
journal, October 2017

  • Pan, Qingsong; Zhou, Haofei; Lu, Qiuhong
  • Nature, Vol. 551, Issue 7679
  • DOI: 10.1038/nature24266

Strain rate dependent shear localization and deformation mechanisms in the CrMnFeCoNi high-entropy alloy with various microstructures
journal, August 2020


Preparation of superfine-grained high entropy alloy by spark plasma sintering gas atomized powder
journal, January 2016


Microstructure and properties of a CoCrFeNiMn high-entropy alloy processed by equal-channel angular pressing
journal, September 2017


Mechanical behavior of high-entropy alloys
journal, May 2021


The influence of stacking fault energy on mechanical properties of Cu-Al-Zn alloys processed by surface mechanical attrition treatment
journal, January 2019


On the role of melt flow into the surface structure and porosity development during selective laser melting
journal, September 2015


Serration behavior and microstructure of high entropy alloy CoCrFeMnNi prepared by powder metallurgy
journal, May 2018


Dependence of dislocation structure on orientation and slip systems in highly oriented nanotwinned Cu
journal, April 2017


Nanotwin-enhanced fatigue resistance of ultrathin Ag films for flexible electronics applications
journal, October 2016


Influence of strain rate and temperature on serrated flow in 9Cr–1Mo ferritic steel
journal, March 2013


A critical review of high entropy alloys and related concepts
journal, January 2017


High-velocity deformation of Al0.3CoCrFeNi high-entropy alloy: Remarkable resistance to shear failure
journal, February 2017

  • Li, Z.; Zhao, S.; Diao, H.
  • Scientific Reports, Vol. 7, Issue 1
  • DOI: 10.1038/srep42742

Multiscale Entropy Analysis of Complex Physiologic Time Series
journal, July 2002


Titanium metal matrix composites: An overview
journal, June 2019


The tensile properties and serrated flow behavior of a thermomechanically treated CoCrFeNiMn high-entropy alloy
journal, April 2017


Hierarchical crack buffering triples ductility in eutectic herringbone high-entropy alloys
journal, August 2021


Effects of Cu and Zn on microstructures and mechanical behavior of the medium-entropy aluminum alloy
journal, April 2020


Experiments and Model for Serration Statistics in Low-Entropy, Medium-Entropy and High-Entropy Alloys
journal, November 2015

  • Carroll, Robert; Lee, Chi; Tsai, Che-Wei
  • Scientific Reports, Vol. 5, Issue 1
  • DOI: 10.1038/srep16997

Reasons for the superior mechanical properties of medium-entropy CrCoNi compared to high-entropy CrMnFeCoNi
journal, April 2017


Effects of manufacturing parameters and mechanical post-processing on stainless steel 316L processed by laser powder bed fusion
journal, January 2021

  • Afkhami, Shahriar; Dabiri, Mohammad; Piili, Heidi
  • Materials Science and Engineering: A, Vol. 802
  • DOI: 10.1016/j.msea.2020.140660

MULTISCALE ENTROPY ANALYSIS OF THE PORTEVIN-LE CHATELIER EFFECT IN AN Al-2.5%Mg ALLOY
journal, September 2010


Twin-coupled shear bands in an ultrafine-grained CoCrFeMnNi high-entropy alloy deformed at 77K
journal, March 2022


Rapid preparation of AlCoCrFeNi high entropy alloy by spark plasma sintering from elemental powder mixture
journal, October 2016


Breakdown of the Hall-Petch relationship in extremely fine nanograined body-centered cubic Mo alloys
journal, July 2021


Nano-twin mediated plasticity in carbon-containing FeNiCoCrMn high entropy alloys
journal, October 2015


Mechanical properties of high-entropy alloys with emphasis on face-centered cubic alloys
journal, May 2019


Microstructural evolution in adiabatic shear band in the ultrafine-grained austenitic stainless steel processed by multi-axial compression
journal, August 2014


Microstructure evolution and critical stress for twinning in the CrMnFeCoNi high-entropy alloy
journal, October 2016


Extra strengthening and work hardening in gradient nanotwinned metals
journal, November 2018