Analysis of the Most Important Factors that Affect Tensile and Shear Strength of Dual-Phase Steels Using Taguchi Method

Abstract

Dual-phase steels are high-strength steels which are heat treated to contain both a ferrite and martensite microstructure to achieve an extra strength. They have high formability, low alloy content, and high strength. In today's competitive environment, the aim of businesses is to produce quality products with a low cost. The quality is taken into consideration substantially in products selection. In this study, the DP 600 series of the dual-phase steel group, which has become widespread in the automotive sector in recent years, is discussed and the most important factors and factor levels affecting the tensile and shear strength of these automotive sheets are analyzed using the Taguchi method. The main reason of using the Taguchi method is to reduce the number of experiments to be performed using orthogonal arrays. So it is expected to achieve less time and labor force and low cost. Firstly, the average and S/N ratio for each experiment using the L16 orthogonal array are calculated and found which levels are more appropriate for the factors. Then, analysis of variance is performed in order to determine the factors, which significantly affect the tensile and shear strength of dual-phase 600 type automobile sheets.