Title: Distilling physical origins of hardness in multi-principal element alloys directly from ensemble neural network models

Journal Article · · npj Computational Materials

Abstract Despite a plethora of data being generated on the mechanical behavior of multi-principal element alloys, a systematic assessment remains inaccessible via Edisonian approaches. We approach this challenge by considering the specific case of alloy hardness, and present a machine-learning framework that captures the essential physical features contributing to hardness and allows high-throughput exploration of multi-dimensional compositional space. The model, tested on diverse datasets, was used to explore and successfully predict hardness in Al x Ti y (CrFeNi) 1- x - y , Hf x Co y (CrFeNi) 1- x - y and Al x (TiZrHf) 1- x systems supported by data from density-functional theory predicted phase stability and ordering behavior. The experimental validation of hardness was done on TiZrHfAl x . The selected systems pose diverse challenges due to the presence of ordering and clustering pairs, as well as vacancy-stabilized novel structures. We also present a detailed model analysis that integrates local partial-dependencies with a compositional-stimulus and model-response study to derive material-specific insights from the decision-making process.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1876511
Report Number(s):
IS-J 10,851; 153; PII: 842
Journal Information:
npj Computational Materials, Journal Name: npj Computational Materials Journal Issue: 1 Vol. 8; ISSN 2057-3960
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (57)

Solid-Solution Phase Formation Rules for Multi-component Alloys journal June 2008
Data‐Driven Materials Science: Status, Challenges, and Perspectives journal September 2019
Formation of simple crystal structures in Cu-Co-Ni-Cr-Al-Fe-Ti-V alloys with multiprincipal metallic elements journal August 2004
Fast Slip Velocity in a High-Entropy Alloy journal April 2018
Prediction of the Composition and Hardness of High-Entropy Alloys by Machine Learning journal July 2019
Cohesion in alloys — fundamentals of a semi-empirical model journal April 1980
Phase stability in high entropy alloys: Formation of solid-solution phase or amorphous phase journal December 2011
Ab initio thermodynamics of the CoCrFeMnNi high entropy alloy: Importance of entropy contributions beyond the configurational one journal November 2015
A precipitation-hardened high-entropy alloy with outstanding tensile properties journal January 2016
A combinatorial assessment of AlxCrCuFeNi2 (0 < x < 1.5) complex concentrated alloys: Microstructure, microhardness, and magnetic properties journal September 2016
Material structure-property linkages using three-dimensional convolutional neural networks journal March 2018
BCC-FCC interfacial effects on plasticity and strengthening mechanisms in high entropy alloys journal September 2018
Machine learning assisted design of high entropy alloys with desired property journal May 2019
First-principles and machine learning predictions of elasticity in severely lattice-distorted high-entropy alloys with experimental validation journal December 2019
The effect of chemical disorder on defect formation and migration in disordered max phases journal February 2020
Phase prediction in high entropy alloys with a rational selection of materials descriptors and machine learning models journal February 2020
First-principles prediction of incipient order in arbitrary high-entropy alloys: exemplified in Ti0.25CrFeNiAl journal May 2020
Vacancy-mediated complex phase selection in high entropy alloys journal August 2020
Learning phase selection and assemblages in High-Entropy Alloys through a stochastic ensemble-averaging model journal September 2021
Database on the mechanical properties of high entropy alloys and complex concentrated alloys journal December 2018
Effects of Al addition on the microstructure and mechanical property of AlxCoCrFeNi high-entropy alloys journal July 2012
Applications of an extended Miedema's model for ternary alloys journal January 2010
Microstructure and mechanical properties of multi-component AlCrFeNiMox high-entropy alloys journal October 2013
A new thermodynamic parameter to predict formation of solid solution or intermetallic phases in high entropy alloys journal February 2016
Effect of Cr content on microstructure and properties of Mo0.5VNbTiCrx high-entropy alloys journal March 2020
Effects of Hf on the microstructure and mechanical properties of CoCrFeNi high entropy alloy journal June 2020
Materials discovery and design using machine learning journal September 2017
Theoretical prediction on thermal and mechanical properties of high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C by deep learning potential journal April 2020
Lattice distortion as an estimator of solid solution strengthening in high-entropy alloys journal February 2021
Prediction of high-entropy stabilized solid-solution in multi-component alloys journal February 2012
Phase evolution, microstructure, and mechanical behaviors of the CrFeNiAlxTiy medium-entropy alloys journal January 2020
High cycle fatigue deformation mechanisms of a single phase CrMnFeCoNi high entropy alloy journal March 2020
Multicomponent high-entropy Cantor alloys journal July 2021
Electronic mechanism of hardness enhancement in transition-metal carbonitrides journal May 1999
Deep learning journal May 2015
Metastable high-entropy dual-phase alloys overcome the strength–ductility trade-off journal May 2016
Materials informatics for the screening of multi-principal elements and high-entropy alloys journal June 2019
Tailoring heterogeneities in high-entropy alloys to promote strength–ductility synergy journal December 2019
Machine learning in materials informatics: recent applications and prospects journal December 2017
Understanding the physical metallurgy of the CoCrFeMnNi high-entropy alloy: an atomistic simulation study journal January 2018
New frontiers for the materials genome initiative journal April 2019
Recent advances and applications of machine learning in solid-state materials science journal August 2019
Machine learning guided appraisal and exploration of phase design for high entropy alloys journal December 2019
Machine-learning structural and electronic properties of metal halide perovskites using a hierarchical convolutional neural network journal April 2020
Two-dimensional Stiefel-Whitney insulators in liganded Xenes journal January 2022
High-entropy alloys journal June 2019
Machine learning for molecular and materials science journal July 2018
Tuning element distribution, structure and properties by composition in high-entropy alloys journal October 2019
An Investigation of Nanomechanical Properties of Materials using Nanoindentation and Artificial Neural Network journal September 2019
Effect of valence electron concentration on stability of fcc or bcc phase in high entropy alloys journal May 2011
Tunable stacking fault energies by tailoring local chemical order in CrCoNi medium-entropy alloys journal August 2018
Atomic short-range order and incipient long-range order in high-entropy alloys journal June 2015
Density-Functional Theory for Random Alloys: Total Energy within the Coherent-Potential Approximation journal May 1986
Generalized Gradient Approximation Made Simple journal October 1996
Ta-Nb-Mo-W refractory high-entropy alloys: Anomalous ordering behavior and its intriguing electronic origin journal May 2018
Effects of titanium addition on microstructure and mechanical properties of CrFeNiTi x (x = 0.2–0.6) compositionally complex alloys journal March 2019
Calculations of Amorphous-Forming Composition Range for Ternary Alloy Systems and Analyses of Stabilization of Amorphous Phase and Amorphous-Forming Ability journal January 2001