@Article{icces.2023.010064,
AUTHOR = {Jia Li, Yang Chen, Baobin Xie, Weizheng Lu, Qihong Fang},
TITLE = {Deformation	Behaviour	and	Strengthening	Mechanism	of	High-Entropy	 Alloys	Using	Model	and	Simulation},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {25},
YEAR = {2023},
NUMBER = {3},
PAGES = {1--2},
URL = {http://www.techscience.com/icces/v25n3/53846},
ISSN = {1933-2815},
ABSTRACT = {The	high-profile	high-entropy	alloy	shows	outstanding	mechanical	properties.	However,	the	accurate	and	
reasonable	models	for	describing	the	mechanical	behavior	of	HEAs	are	still	scarce	due	to	their	distinctive	
characteristics	such	as	serious	lattice	distortion,	which	limit	the	engineering	application.	We	have	developed	
a	new	general	framework	combining	atomic	simulation,	discrete	dislocation	dynamics	and	crystal	plasticity	
finite	 element	method,	 to	 study	 the	 deformation	 behaviour	 and	 strengthening	mechanism of	HEAs,	 and	
realized	 the	influence	 of	 complex	 cross-scale	 factors	 on	material	 deformation	 [1-3].	 Compared	 with	 the	
classic	 crystal	 plasticity	 finite	 element,	 the	 bottom-up	 hierarchical	 multiscale	 model	 could	 couple	 the	
underlying	physical	mechanisms	from the	nano-micron-meso	scales	and	captures	the	inhomogeneous	strain	
field	 induced	 by	 the	 serious	 lattice	 distortion	 and	 chemical	 short-range	 order,	 thus	 showing	 the	 high	
accuracy	and	ubiquitous	availability	 for	HEAs.	The	predicted	results	show	 that	 the	strain-stress	curve	of	
HEAs	 is	 in	 good	 agreement	 with	 the	 experimental	 results,	 which	 verifies	 the	 accuracy	 of	 the	 proposed	
method.	In	addition	to	the	dislocation	evolution,	the	heterogeneous	strain	distribution	combined	with	the	
significant	 change	 from	 the	 orientation	 of	 some	 grains	 could	 be	 an	 important	 reason	 for	 the	 enhanced	
strength	at	the	micron	scale.	The	present	work	not	only	gives	an	insight	into	the	relationship	between	the	
multiscale	microstructure	and	deformation	behaviour	considering	 the	mechanistic	linkages	of	 the	lattice	
distortion,	dislocation	behaviour,	and	grain	structure,	but	also	provides	a	general	approach	 to	physically	
predict	the	mesoscopic	mechanical	response	in	HEAs.},
DOI = {10.32604/icces.2023.010064}
}