Influence of strain rate and temperature on tensile properties and flow behaviour of a reduced activation ferritic–martensitic steel

Serrated Flow and Work-Hardening Behavior of China Low Activation Martensitic Steel (CLAM)

“…More tensile tests should be further carried out so that the alternate method could be used to obtain activation energy of present CLAM steel at intermediate temperatures. On the other hand, the variations of n V with temperatures in present CLAM steel is different from other previous reports [11,[24][25][26]31,34,35], deserving further investigation.…”

“…The observed rapid decrease in the values of σ S /E and σ I /E with increasing temperatures indicate the dominance of recovery processes [25][26][27] in the temperature range of 723-923 K (450-650 • C). However, the variations of n V as a function of temperature is significantly different from several previous reports for F/M steels [24][25][26]34,35], in which n V exhibits a rapid increase with increasing temperatures in the elevated temperature range. Generally, the values of n V are conceded to depend on the relative contribution of glide and climb mechanisms to recovery [27], and the mechanism of climb or sub-boundary migration in the high temperature range should correspond to a large absolute value of n V .…”

“…However, mild serrations are also observed in elevated temperatures in CLAM steel, which is different from these reports [5][6][7][8]. Notably, as distinct from present study, Vanaja investigated tensile tests for a series of reduced activation ferritic/martensitic steels, and no serrated flow was observed over the entire temperature range [34,35].…”

Compatibility study of plasma grown alumina coating with Pb–17Li under static conditions

“…It is also important to ensure that the heat treatment so conducted after aluminizing to form a stable a-Al 2 O 3 coating does not impair the bulk microstructure of 9Cr steels. In this context, normalizing (at 980°C) treatment and tempering (at 750°C) heat treatment post aluminizing has been chosen in line with reported heat treatment parameters for bulk 9Cr steels [13,14]. Metastable alumina phases are inevitable to form at such temperatures.…”

Low-cycle Fatigue Behavior and Constitutive Relations for a Ferritic Stainless Steel at Elevated Temperatures

“…Consequently, the properties, such as light weight, high corrosion resistance, and fairly high thermal fatigue resistance are of greater importance in selection of material for high temperature-structure such as in exhaust manifold systems of automotives. So the material parameters and mechanical properties of structural steels in elasto-plastic cyclic behavior at elevated temperature have gained interests in many studies during recent years to replace cast iron, the traditional material for these applications [1][2][3][4][5]. For years, various theoretical constitutive models based on continuum mechanics have been developed for describing the material nonlinearities and allowing accurate modeling of hardening/softening responses under cyclic loading conditions [6][7][8][9][10].…”