Multiple Quadratic Polynomial Regression Models and Quality Maps for Tensile Mechanical Properties and Quality Indices of Cast Aluminum Alloys according to Artificial Aging Heat Treatment Condition

Table 2

Comparison result of the multiple quadratic and linear regression models for tensile mechanical properties and quality indices of A357.

	Multiple quadratic regression models			Multiple linear regression models
	MAE	MRE (%)	R ^2	MAE	MRE (%)	R ^2
YS (MPa)	15.976	6.819	0.786	26.423	11.522	0.316
UTS (MPa)	9.529	3.052	0.748	17.461	5.803	0.020
E f (%)	1.224	11.795	0.853	1.515	14.722	0.719
W (MJ/m^3)	2.793	9.070	0.867	2.934	9.988	0.831
Q (MPa)	7.598	1.663	0.806	13.854	3.095	0.475
Q R (MPa)	49.829	6.222	0.856	56.861	7.189	0.779
Q C (MPa)	13.456	3.313	0.729	25.130	6.451	0.007
Q 0 (MPa)	20.395	3.626	0.828	24.213	4.499	0.752