Mechanical properties and microstructure evolution of high-manganese (0.9 C – 13.95 Mn) steel during aging

Abstract

The influence of temperature on the structural and mechanical properties of the (0.9 C - 13.95 Mn) steel was investigated in this work. The high-manganese steel has underwent aging treatments at temperatures 700, 750, 800 and 850 °C for different times. The experimental techniques used are hardness test, scanning electron microscopy, optical microscopy and X-ray diffraction. The mechanical behavior and microstructural evolution of the high-manganese steel during aging are almost the same. The aging of the high-manganese steel was characterized by a rapid hardening while the overaging by a slow softening. In aging, the dispersion of fine M7C3 carbides in the austenite led to an increase in hardness. In overaging, the softening was caused by the coarsening of the M7C3 carbides.

Microstructure, Nano-, and Macro-Indentation Characterization of AISI 302 Steel After High-Temperatures Aging

“…Owing to their importance at the industrial level, steels have been extensively studied to understand their metallurgical behavior [5][6][7][8][9][10]. In the literature, the phenomenon of austenite grain growth and its relationship with the temperature and time of the aging treatment have gained great interest [11][12][13].…”

Microstructure, macro-, and nano-hardness assessment of AISI 302 steel aged at 1000°C

“…At the level of scientific research, an attention has been paid to the assessment of the metallurgical behavior of the stainless steels, including their aging behavior [5][6][7][8][9]. At hightemperatures and for prolonged holding times, several studies demonstrated that the microstructure of the austenitic stainless steels undergoes changes as the increase of the grain size and the decrease in the area of grain boundaries per unit volume [10][11][12][13].…”