The Mechanical Properties of Low Alloy TRIP-Aided Steel: The Role of Retained Austenite

Yield point phenomenon in low-alloyed TRIP-aided steel: Role of retained austenite

“…The grades belonging to AHSS class of steels are typically characterised by a continuous yielding behaviour [5,10-13] and the investigation on the yielding behaviour of AHSS is rather limited in the literature. The current work is an extension of the work published recently by the current authors [14]. This work first shows that the undesirable discontinuous yielding could be observed in TRIP-aided steel under certain circumstances and then highlights the role of retained austenite on the yielding behaviour.…”

“…In addition, the absence of any austenite peaks in Figure 3 shows that the retained austenite obtained through TMCP-1 transforms to martensite on quenching the samples in liquid nitrogen. A more detailed discussion on these aspects is presented in [14].…”

“…Steel with composition Fe– 0.20 C– 1.60 Mn– 0.50 Si– 1.20 Al– 0.25 Mo– 0.04 Nb (wt-%) was selected for the study. The thermo-mechanical controlled processing (TMCP) cycles were performed using ‘Servotest Thermo-mechanical Treatment Simulator’ in plane strain compression mode (Figure 1) [14]. Only the key aspects of the TMCP cycles are discussed below, more details are provided in [14].…”

“…The thermo-mechanical controlled processing (TMCP) cycles were performed using ‘Servotest Thermo-mechanical Treatment Simulator’ in plane strain compression mode (Figure 1) [14]. Only the key aspects of the TMCP cycles are discussed below, more details are provided in [14].

Figure 1 Schematic illustration of the thermo-mechanical controlled processing (TMCP) cycles [14].

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“…Only the key aspects of the TMCP cycles are discussed below, more details are provided in [14].

Figure 1 Schematic illustration of the thermo-mechanical controlled processing (TMCP) cycles [14].

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