The fatigue characteristics of Plasma Nitrided three Pct Cr-Mo steel

Fatigue strength improvement of a hard chromium plated AISI 4140 steel using a plasma nitriding pre‐treatment

“…This specimen, nitrided for 4 h, fractured at approximately 10 6 cycles under a 700‐MPa cyclic stress. Sub‐surface crack formation dominates in nitrided smooth specimens in the high cycle regime 7,8,21 . There is extensive research on sub‐surface fatigue mechanisms and related factors in the literature 22 .…”

“…The plasma nitriding (PN) process has found increasing application in industry due to a number of advantages over the conventional surface treatments. It is well known that PN is effective in improving the fatigue performance of steels 7–11 . Recently, the PN process has also been used as a pre‐treatment in improving both the wear resistance and the fatigue resistance of hard coated tool steels 12–14 …”

“…It is well known that PN is effective in improving the fatigue performance of steels. [7][8][9][10][11] Recently, the PN process has also been used as a pre-treatment in improving both the wear resistance and the fatigue resistance of hard coated tool steels. [12][13][14] The aim of this study was to investigate the effect of a PN pre-treatment on the rotary bending fatigue performance of HC-plated AISI 4140 steel.…”

Guest editorial: In memory of Tom Bell

“…His team at Birmingham conducted intensive research on dc plasma nitriding [33][34][35]41,42 in the 1980s and plasma nitrocarburising during the late 1990s 66,80,83 and the early 2000s. 163,164,203,204 A new plasma technology, active screen plasma, emerged in the late 1990s, which can effectively overcome the technical problems of dc plasma such as arcing, edge effect and hollow cathode effect.…”

Surface Engineering: Past, Present, and Future

“…14,32,33 In engineering applications such as camshafts and gears, where concentrated loading occurs, a surface capable of sustaining additional Hertzian stresses or fatigue stresses may be required. The work of Barker and Smith 31 and earlier work shows that a high core hardness results in a high case hardness and a high case depth after nitriding.…”