Mechanical Properties of Nickel Free High Nitrogen Austenitic Stainless Steels

Plastic flow behavior and its relationship to tensile mechanical properties of high nitrogen nickel-free austenitic stainless steel

“…8a that the values of ε n 2 L vary in a narrow range with σ U for the present HNS and other austenitic stainless steels and alloyed steels available in literature [16,[18][19][20]22,23,26,[28][29][30]33,34,[37][38][39][40]. Such results, in fact, is reasonable as indicated by the results in Fig.…”

“…Furthermore, it can be noted from Table 2 and Fig. 8b that σ σ / L 0.2 varies also in a narrow range with an increase in strength level for the present HNS and other austenitic stainless steels and alloyed steels [17][18][19][20][21][22][23][24]26,[28][29][30]38,39,41]. Such results suggest that the stress increment from σ 0.2 to σ L is insensitive to the material microstructure or treatment conditions for the present HNS and other austenitic stainless steels and alloyed steels.…”

“…Many attempts have been made to analyze plastic flow behavior of austenitic stainless steels based on the Ludwigson equation [15,[17][18][19]22,[23][24][25][26][27][28][29][30][31][32][33][34]. In these analyses, the effects of various factors such as microstructures (e.g.…”

“…grain size [24], size, shape and amount of precipitation phases [17,18,25,26,30]), chemical compositions (e.g. contents of carbon, nitrogen and allying elements [19,22,23,28]) and experimental conditions (e.g. test temperature [15,27,29,[31][32][33], loading strain rate [34]) on the plastic flow behavior were studied and the corresponding mechanisms were explained based on the n 1 , n 2 and ε L values obtained.…”

Microstructural evolution and mechanical properties of aging high nitrogen austenitic stainless steels

“…The chi (χ) phase is a relatively minor phase and has been mainly found in Mo-containing HNS after long-term aging treatment at 900°C [14]. Some researchers [15][16][17][18][19] have studied the aging response in HNS and the mechanical properties of solution treated HNS, but the relationship between the microstructure and mechanical properties needs further systematic investigation. The present study is focused on the microstructural evolution of HNS after aging at 650-950°C and the influence of microstructural evolution on the mechanical properties including Vickers hardness, impact toughness, and tensile properties.…”