Analysis of Springback Behaviour in Micro Flexible Rolling of Crystalline Materials

Table 1

Average values of properties of 304 stainless steel specimens with different average grain sizes.

Property	Approximate average grain size (μm)
	22 (S1)	29 (S2)	40 (S3)	53 (S4)	61 (S5)	74 (S6)
Density ρ (kg/m^3)	8000	8000	8000	8000	8000	8000
Elastic modulus E (MPa)	177890	169893	162570	156090	148881	140803
Poisson’s ratio ν	0.29	0.29	0.29	0.29	0.29	0.29
Yield strength at 0.2% offset σ0.2 (MPa)	356	340	325	312	297	282
Ultimate tensile strength σu (MPa)	778	745	721	700	684	655
Elongation at failure εf (%)	65	61	58	56	55	52
Weighted heterogeneity coefficient	1.012	1.024	1.031	1.024	1.026	1.021