TY  - EJOU
AU  - Liu, Zhiyuan 
AU  - Zhu, Jue 

TI  - Study	on	Dynamic	Mechanical	Properties	of Q245R Steel	at	High Temperature
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2023
VL  - 26
IS  - 1
SN  - 1933-2815

AB  - In	order	to	study	the	dynamic	mechanical	properties	at	high	temperature	and	high	strain	rate	[1]	of	Q245R	
steel	after	corrosion,	 the	electrochemical	accelerated	corrosion	 test	by	constant	current	method	and	 the	
high	strain	rate	tensile	test	at	high	temperature	[2] by	High	Temperature	Synchronous	Hopkinson	Tensile	
test	device	were	carried	out.	The	test	results	show	that	Q245R	steel	has	obvious	strain	rate	strengthening	
effect	and	temperature	softening	effect,	and	under	certain	conditions,	temperature	becomes	the	main	factor	
affecting	 the	 material	 properties.	 In	 order	 to	 consider	 the	 heat	 treatment	 and	 corrosion	 effects,	 the	
traditional	 Johnson-Cook [3-4] constitutive	 equation	 was	 improved,	 and	 the	 constitutive	 equation	 with	
strain	 rate	 effect,	 temperature	 softening,	 heat	 treatment	 effect	 and	 corrosion	 weakening	 was	 fitted	 by	
MATLAB	software.	The	fitting	result	of	this	model	is	consistent	with	the	test	data,	which	can	provide	a	basis	
for	dynamic	mechanical	analysis	of	Q245R	steel	under	high	temperature	and	high	strain.
KW  - Q245R	steel;	high	temperature;	high	strain

DO  - 10.32604/icces.2023.09798