Effect of Temperature, Strain rate, Manganese and Carbon Content on flow Behavior of three Ternary Fe‐Mn‐C (Fe‐Mn23‐C0.3, Fe‐Mn23‐C0.6, Fe‐Mn28‐C0.3) High‐Manganese Steels

Abstract

In this work compression tests were performed to characterize the flow behavior of three different high manganese austenitic steels (HMS) in dependence of temperature (300–1200 °C) and strain rate (0.1‐10 s−1). True stress‐true strain curves were calculated from the experimental data. Temperature compensation was applied to remove the effects of adiabatic heating. At 300 °C the influence of strain rate is small but rapidly increases with temperature. DRX can be observed above 1100 °C for all HMS with 23 wt% Mn starting from the smaller strain rates. Higher Mn contents seem to promote DRX which occurs first for a 28 wt% Mn steel at 1000°C. While an increasing Mn content decreases the maximum flow stress at smaller temperatures, the opposite is found at temperatures above 700 °C. Carbon influences the stress‐strain curves mainly at temperatures below 700 °C as it raises the maximum stress levels. At temperatures above 1100 °C all three investigated HMS show similar flow curves. By increasing the temperature from 300 °C to 1200 °C the initial flow stresses are reduced by a factor of ten. The maximum flow stress levels are decreased by a factor of eight (Fe‐Mn28‐C0.3), ten (Fe‐Mn23C0.3) and eleven (Fe‐Mn23C0.6).

Coupling of Crystal Plasticity Finite Element and Phase Field Methods for the Prediction of SRX Kinetics after Hot Working

“…X60Mn23 is a high manganese steel grade which exhibits mechanical twining at room temperature. The process route stated by Wietbrock et al [64] was followed for sample preparation. The material was cast into blocks of 100 kg and afterwards hot forged at 11508C up to 65% thickness reduction, then cut into pieces and homogenized again at 11508C for 5 hours to reduce segregations.…”

“…For details of the testing procedure cf. Wietbrock et al [64] In Figure 1, the hardening response at 1050 8C is shown.…”

Effect of manganese content on hot deformation behaviour of Fe–(20/27)Mn–4Al–0.3C non-magnetic steels

“…Wietbrock et al 11 argued that the increase in Mn addition diminished the peak stress at the temperature v700uC, whereas the trend was opposite at higher temperatures in terms of Fe- ( 14) respect-ively. Although the increasing trend of Q HW values is shown, the impact of inconsistent experimental con-ditions cannot be ruled out, and it seems beyond the effect arising from the larger amount of Mn addition itself on those constants of constitutive equations.…”

Experimental Uncertainties affecting the Accuracy of Stress-Strain Equations by the Example of a Hensel-Spittel Approach

“…This temperature correction compensates for dissipation and allows for the computation of isothermal flow stress values, which are determined by interpolating the stress values in the way described in detail in [1]. This temperature correction compensates for dissipation and allows for the computation of isothermal flow stress values, which are determined by interpolating the stress values in the way described in detail in [1].…”