TY  - EJOU
AU  - Shao, Jianli 
AU  - Wei, dong 

TI  - Atomistic	Simulations	on	the	Shock	Response	of	Nanoscale	He	Bubble	in	 Metal
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2023
VL  - 26
IS  - 4
SN  - 1933-2815

AB  - This	report	mainly	introduces	our	recent	research	on	the	shock-induced	collapse,	migration	and	coalescence	
of	He	bubbles	in	metal	based on	atomistic	simulations.	The	He	bubble	will	be	compressed	 to	permanent	
deformation	with	the	finite	plastic	collapse	of	metal.	Under	strong	shock,	the	He	bubble	can	be	breakdown	
by	the	nano-jet	of	the	metal,	but	it	returns	to	a	reduced	sphere	in	the	molten	metal	after	long-time	evolution,	
driven	by	the	He-Al	interface	energy.	Besides,	the	shock-induced	migration	of	He	bubble	is	revealed,	which	
can	be	divided	into	shock	acceleration	and	the	following	inertial	motion.	Moreover,	two	coalescence	modes	
caused	by	ligament	failure	and	interface	deformation	are	simulated.	The	Frenkel's	model	is	used	to	analyze	
the	coalescence	kinetics	dominated	by	the	interface	deformation,	and	the	smoothing	of	sharp	neck	observed	
in	our	simulations	is	discussed.
KW  - He	bubble;	collapse;	migration;	coalescence;	shock
KW  - 	atomistic	simulation

DO  - 10.32604/icces.2023.09101