Effect of aging on the microstructure and deformation behavior of austenite base lightweight Fe–28Mn–9Al–0.8C steel

Choi, Kwonhue; Seo, Chang-Hyo; Lee, Hakcheol; Kim, S.K.; Kwak, Jai Hyun; Chin, Kwang‐Geun; Park, Kyung‐Tae; Kim, Nack J.

doi:10.1016/j.scriptamat.2010.07.036

Cited by 212 publications

(83 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is not necessarily to be the case. Haase et al [7], Chooi et al [50], and Lin et al [26] reported great ductility (~55%) in the quenched and homogenized austenitic Iron-Manganese-Aluminium-Carbon (Fe-Mn-Al-C) steels that contain a low volume fraction of fine shearable κ-carbides. After aging, the ductility reduces with the increasing volume fraction and size of κ-carbides [7].…”

Section: The Effects Of Precipitates On Slip Systems and Dislocation-mentioning

confidence: 99%

“…After aging, the ductility reduces with the increasing volume fraction and size of κ-carbides [7]. The slip bands are closely spaced (Figure 5a) in the homogenized state when the κ-carbides are fine and in a low volume fraction, while the slip bands become further apart (Figure 5b) when the κ-carbides are larger and are in a higher volume fraction [7,50]. This suggests that the slip distribution depends on not only the size, but also the volume fraction and perhaps the number density of the precipitates.…”

Section: The Effects Of Precipitates On Slip Systems and Dislocation-mentioning

confidence: 99%

“…Nano-scale precipitates can be obtained through nucleation [3,4,15,35] or spinodal decomposition [7,26,50]. Most of the steels [2][3][4]35] with a high number density (in the order of 10 24 m −3 ) of nano-scale precipitates were developed based on the theory of nucleation.…”

Section: Nucleation Of Precipitatesmentioning

confidence: 99%

See 2 more Smart Citations

A Review on Nano-Scale Precipitation in Steels

Kong

Liu

2018

Technologies

View full text Add to dashboard Cite

Nano-scale precipitation strengthened steels have drawn increasing attention from the materials community recently due to their excellent mechanical behaviors at room temperature, high specific strength to weight ratio, superior radiation resistivity, good weldability, and many more to mention. With the advent of technology, such as synchrotron X-ray, atom probe tomography (APT), and high resolution transmission electron microscopy (HR-TEM), probing precipitates down to the atomic level has been made possible. In this paper, various nano-scale precipitate strengthened steels are compiled with the aim to identify the effects of size and number density of precipitates on the mechanical properties. Besides, the strengthening mechanisms, slip systems, and dislocation-precipitate interactions are reviewed. Moreover, the nucleation and stability of precipitates are also discussed. Finally, the challenges and future directions of the nano-scale precipitate strengthened steels are explored.

show abstract

Section: The Effects Of Precipitates On Slip Systems and Dislocation-mentioning

confidence: 99%

Section: The Effects Of Precipitates On Slip Systems and Dislocation-mentioning

confidence: 99%

See 1 more Smart Citation

A Review on Nano-Scale Precipitation in Steels

Kong

Liu

2018

Technologies

View full text Add to dashboard Cite

show abstract

“…Depending on the stacking fault energy, which is a result of alloying content, temperature, deformation grade, and other factors, HMnS exhibit a variety of different active deformation modes [4][5][6][7]. Those deformation modes include transformation induced plasticity (TRIP), twinning-induced plasticity (TWIP) or pronounced planar glide in combination with the formation of dislocation cells that is sometimes referred to as microband-induced plasticity (MBIP) [1,[8][9][10]. The mode of deformation significantly influences the level of work hardening and plays a major role in determining the mechanical properties [7].…”

Section: Introductionmentioning

confidence: 99%

Ab Initio-Based Modelling of the Yield Strength in High-Manganese Steels

Sevsek

Bleck

2018

Metals

View full text Add to dashboard Cite

An ab initio-based model for the strength increase by short-range ordering of C-Mn-Al clusters has been developed. The model is based on ab initio calculations of ordering energies. The impact of clusters on the yield strength of high-manganese austenitic steels (HMnS) is highly dependent on the configurational structure of the cells that carbon atoms will position themselves as interstitial atoms. The impact of the alloying elements C, Mn, and Al on the potential and actual increase in yield strength is analyzed. A model for the calculation of yield strengths of HMnS is derived that includes the impact of short-range ordering, grain size refinement, and solid solution strengthening. The model is in good agreement with experimental data and performs better than other models that do not include strengthening by short-range ordering.

show abstract

“…Materials possessing such characteristics fulfill their functions well in the course of a possible collision of a vehicle, which ensures a higher level of safety. The microstructures and the mechanical properties of the austenitic Fe-Mn-Al-C alloys have been extensively studied [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. In these studies, when a Fe-(28-35) wt.% Mn-(7-12) wt.% Al-(0.7-1.3) wt.% C alloy was solution treated, the microstructure was single -phase austenite.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Changes in a High-Manganese Austenitic Fe-Mn-Al-C Steel

Witkowska¹,

Zielińska‐Lipiec²,

Kowalska³

et al. 2014

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

Microstructural changes in the age-hardenable Fe-28wt.%Mn-9wt.%Al-1wt.%C steel during ageing at 550• C for various times have been investigated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The steel was produced in an induction furnace and the ingot, after homogenization at 1150• C for 3 hours under a protective argon atmosphere, was hot-rolled and subsequently cold-rolled up to 23% reduction. The sheet was then aged at 550• C for various times in an argon atmosphere and cooled in air. XRD analysis and TEM observations revealed a modulated structure and superlattice reflections produced by spinodal decomposition, which occurred during ageing at 550• C. The existence of satellites suggests that either (Fe,Mn) 3 AlC x carbides were formed within the austenite matrix by spinodal decomposition during cooling or chemical fluctuactions occurred between the (Fe,Mn) 3 AlC x carbides and the austenitic matrix.Keywords: high-manganese austenitic steel, spinodal decomposition, carbides, microstructure W pracy analizowano zmiany mikrostruktury w stali Fe-28%wt.Mn-9%wt.Al-1%wt.C zachodzące podczas starzenia w temperaturze 550• C w różnych czasach. Stal Fe-28Mn-9Al-1C wytopiono w próżniowym piecu indukcyjnym. Po odlaniu wlewek homogenizowano w temperaturze 1150• C przez 3 godziny w atmosferze argonu. Wlewek walcowano na gorąco a następnie na zimno do 23 % odkształcenia. Próbki po odkształceniu starzono w temperaturze 550• C dla różnych czasów w atmosferze argonu i chłodzono na powietrzu. Obserwacje elektronomikroskopowe starzonej stali Fe-28Mn-9Al-1C ujawniły modulowaną strukturę i refleksy od nadstruktury, co było efektem rozpadu spinodalnego, który miał miejsce podczas procesu starzenia. Występowanie satelitów na zapisach dyfrakcyjnych sugeruje, że węgliki (Fe,Mn) 3 AlC x powstały w osnowie austenitycznej na skutek rozpadu spinodalnego zachodzącego podczas chłodzenia czy fluktuacji chemicznych występujących pomiędzy węglikami (Fe, Mn) 3 AlC x i osnową austenityczną.

show abstract

Effect of aging on the microstructure and deformation behavior of austenite base lightweight Fe–28Mn–9Al–0.8C steel

Cited by 212 publications

References 17 publications

A Review on Nano-Scale Precipitation in Steels

A Review on Nano-Scale Precipitation in Steels

Ab Initio-Based Modelling of the Yield Strength in High-Manganese Steels

Microstructural Changes in a High-Manganese Austenitic Fe-Mn-Al-C Steel

Contact Info

Product

Resources

About