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Deformation behaviour of high-manganese steel with addition of niobium under quasi-static tensile loading

Magdalena Barbara Jabłońska
Magdalena Barbara Jabłońska
, 
Katarzyna Jasiak
Katarzyna Jasiak
, 
Karolina Kowalczyk
Karolina Kowalczyk
, 
Iwona Bednarczyk
Iwona Bednarczyk
, 
Mateusz Skwarski
Mateusz Skwarski
, 
Marek Tkocz
Marek Tkocz
 y 
Zbigniew Gronostajski
Zbigniew Gronostajski
   | 30 dic 2022
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Publicado en línea: 30 dic 2022
Páginas: 1 - 11
Recibido: 29 oct 2022
Aceptado: 17 nov 2022
DOI: https://doi.org/10.2478/msp-2022-0029
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© 2022 Magdalena Barbara Jabłońska et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Microstructure of the high-manganese MnAlNb steel after solution annealing at 1,100°C/2 h: austenite with annealing twins; the average grain diameter – 125 μm; light microscopy
Microstructure of the high-manganese MnAlNb steel after solution annealing at 1,100°C/2 h: austenite with annealing twins; the average grain diameter – 125 μm; light microscopy

Fig. 2

Geometric features of specimens used in the tensile tests at strain rates of: (A) 0.001–0.1 s−1 and (B) 0.5 s−1
Geometric features of specimens used in the tensile tests at strain rates of: (A) 0.001–0.1 s−1 and (B) 0.5 s−1

Fig. 3

The simultaneous measurement of temperature and strain during deformation: (A) experimental set-up for the mechanical testing, (B) black–white pattern for DIC measurement, (C) evaluation area in GOM Correlate, (D) example of the strain distribution image. DIC, Digital Image Correlation
The simultaneous measurement of temperature and strain during deformation: (A) experimental set-up for the mechanical testing, (B) black–white pattern for DIC measurement, (C) evaluation area in GOM Correlate, (D) example of the strain distribution image. DIC, Digital Image Correlation

Fig. 4

Regions selected for the microstructure analysis
Regions selected for the microstructure analysis

Fig. 5

The engineering (A) and true (B) stress–strain curves obtained for the MnAlNb steel from the tensile tests conducted at various strain rates
The engineering (A) and true (B) stress–strain curves obtained for the MnAlNb steel from the tensile tests conducted at various strain rates

Fig. 6

Thermograms and DIC strain distribution maps at the moment just before fracture. DIC, digital image correlation
Thermograms and DIC strain distribution maps at the moment just before fracture. DIC, digital image correlation

Fig. 7

The hardness distribution in one piece of the fractured specimen: (A) 0.001 s−1 and (B) 0.1 s−1
The hardness distribution in one piece of the fractured specimen: (A) 0.001 s−1 and (B) 0.1 s−1

Fig. 8

Dependence of the major strain and hardness value on a distance from the fracture: a) 0.001 s−1, b) 0.01 s−1, c) 0.1 s−1, d) 0.5 s−1
Dependence of the major strain and hardness value on a distance from the fracture: a) 0.001 s−1, b) 0.01 s−1, c) 0.1 s−1, d) 0.5 s−1

Fig. 9

Microstructure of MnAl-Nb steel deformed at various strain rates; longitudinal sections taken in regions A and regions B; light microscopy
Microstructure of MnAl-Nb steel deformed at various strain rates; longitudinal sections taken in regions A and regions B; light microscopy

Fig. 10

Microstructure of MnAlNb steel deformed at various strain rates in the regions A and B, SEM. SEM, scanning electron microscopy
Microstructure of MnAlNb steel deformed at various strain rates in the regions A and B, SEM. SEM, scanning electron microscopy

Chemical composition of the examined steel [%wt]

C Mn Al V Nb B P S Ce La Nd Fe
0.47 20.1 3.0 – 0.10 0.003 <0.01 0.003 0.011 0.004 0.004 rest

Values of UTS, total elongation and temperature of MnAlNb steel for different strain rates

Strain rate (s−1) Ultimate tensile strength, UTS (MPa) Total elongation (%) Average temperature in the necked region (°C)
0.001 496 50 42
0.01 590 39 66
0.1 570 45 79
0.5 575 52 104
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Materials Sciences, other, Nanomaterials, Functional and Smart Materials, Materials Characterization and Properties
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