Mechanical Properties and Constitutive Model of Selective Laser Melting 316L Stainless Steel at Different Scanning Speeds

Table 2

Parameters of the J-C constitutive model.

Parameter	Process parameter (mm/s)
	350	650	950	1250
Yield strength A (MPa)	583	584	573	492
Hardening modulus B (MPa)	5086	4336	4554	4818
Hardening index n	1.37	1.26	1.28	1.31
Strain rate sensitivity coefficient C	0.01805	0.01861	0.01896	0.01812
Material parameter C1	7.23e-4	1.37e-3	3.3e-3	1.16e-3
Material parameter m	0.77	0.69	0.60	0.75