Influence of Thermal and Mechanical Processing on Room Temperature Mechanical Properties of Nickel Free High Nitrogen Austenitic Stainless Steels.

The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

“…Note that the a¢-martensite islands were always restricted to bands of closely spaced e-martensite plates. The observed [27][28][29][30] . Table III orientation relationship obeys both the expected Bogers-Burgers relationship between a¢-martensite and e-martensite and the Kurdjumov-Sachs relationship between a¢-martensite and austenite:…”

“…The influence of N on the initial stages of deformation in the case of the low Cr alloy was more pronounced: the addition of N markedly reduced the strain-hardening rate, as can be clearly seen in Figure 3(a) and Table II. The N alloying resulted in an increased 0.2 pct proof stress, as can be seen in Figure 3 and Figure 4, the latter containing data of the present work together with data presented by some of the current authors in a previous publication [41] and other literature data. [27][28][29][30] C. Phase Analysis Table III shows the results of the XRD and MSM phase analysis obtained after tensile testing to fracture. It should be noted that the amount of e-martensite present in the material was difficult to determine directly by means of XRD, because many diffraction peaks of austenite, a¢-martensite, and e-martensite overlap and peak deconvolution is complex.…”

“…N acts as a strong interstitial hardener of the austenitic phase. [27][28][29][30] The increased strength should also interfere with the transformation from austenite to a¢ martensite, because this transformation is associated with a rather large volume change requiring the plastic deformation of the parent austenite phase. The N is also expected to increase the ductility.…”

Investigation on the solution treated behavior of economical 19Cr duplex stainless steels by Mn addition

“…Meanwhile, the manganese has been considered for austenite former and added to increase solubility of nitrogen in stainless steels [11][12][13], and its detrimental effect on the pitting corrosion resistance is usually associated with MnS inclusion formation. Besides that, Toor reported that the resistance to pitting and metastable pitting corrosion of a new high Mn-Ni free DSS decreased with increasing Mn content since the number of (Mn, Cr) oxides acted as preferential sites of pitting [14].…”

Influence Parameters on Nitriding Process of Ferromanganese Alloy

“…This was believed as high nitrogen contained steel is subject to ageing with deterioration of its plasticity with time. Recently, it was noticed that nitrogen has positive significant effect on mechanical properties, phase stability, corrosion behavior, and oxidation resistance [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Moreover, nitrogen as opposed to carbon did not reduce the corrosion resistance of steel [25].…”