The Effect of Ti-Zr Deoxidation on the Mechanical Properties of High Strength Low Alloy Steels
The uniformity of the mechanical properties, especially elongation and impact toughness, were compared between steel A, which was deoxidized with Ti-Zr, and steel B, which was deoxidized with Al. Microstructural observations, energy dispersive X-ray spectroscopy and X-ray diffraction analyses were conducted using an optical microscope, a scanning electron microscope and a transmission electron microscope, respectively. Results showed that sub-micron and nano-sized complex oxides were obtained by the combined deoxidation of Ti-Zr. The stability of the mechanical properties of steel A was better than that of steel B. The elongation and impact toughness of steel A were enhanced relative to those of steel B. This was attributed to spheroidization and the dispersed distribution of MnS inclusions in the matrix of steel A.
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
W. Y. Lu et al., "The Effect of Ti-Zr Deoxidation on the Mechanical Properties of High Strength Low Alloy Steels", Advanced Materials Research, Vols. 146-147, pp. 1878-1884, 2011