Studies on the Mechanism of Work Hardening of Austenitic High Manganese Steel Alloyed with Chromium and Vanadium

Duong, Nam Nguyen; Chieu, Le Thi; Khanh, Pham Mai

doi:10.4028/www.scientific.net/kem.737.32

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…The steel containing about 13% manganese and 1% carbon is known for stable austenite phase and the martensitic transformation was not observed in the room temperature or only occurs at temperatures of ¹196°C. 9) Besides, the hard-working mechanism by twin or crystal lattice dislocations were also noticed. 10) Under the influence of the impact load, the crystal of structure can be deformed and remained.…”

Section: Introductionmentioning

confidence: 98%

Investigation of Microstructures Changing in High Manganese Steel Mn15Cr2V after Heat Treatment and Impacted Load

et al. 2022

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In this paper, the changing of microstructures on the surface layer of high manganese steel (HMnS) Mn15Cr2V under the impacted load was investigated. By theoretical calculations based on stacking fault energy (SFE), it was found that at 300 K, the SFE value of this steel was 34.7247 mJ/m 2 and at 220 K, the SFE value was 34.72173 mJ/m 2 . Thus, with this result, the SFE's value is much larger than the value of the martensitic transformation, which was about 18 mJ/m 2 . It can be shown that there will be no martensite changes even if the sample is heattreated with the sub-zero process. The results of the microstructure analysis show that the microstructures were austenite with carbide particles (VC and Cr 7 C 3 ) that had a small grain size (about 40 nm) and were dispersed in the microstructures. The study's findings revealed that when the number of impact loads is 3,000 times, the surface layer exhibited twinning, slip, and austenite nanoparticles. When the number of impact loads increases by 10,000 times, the microstructure of the surface steel appears in the amorphous phase. The results of theoretical calculations based on the changing of stacking fault energy (SFE) and experimental results show that there is no appearance of martensite form on the surface layer in research conditions.

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Section: Introductionmentioning

confidence: 98%

Investigation of Microstructures Changing in High Manganese Steel Mn15Cr2V after Heat Treatment and Impacted Load

et al. 2022

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“…At room temperature, the steel is so ductile and has a microstructure of Austenite and become stiffer under acting impacts, force. This is particular strengthening mechanism of the steel [1], [5]- [8]. Now, there are many the publishing works about the influence of elements alloys and add force on the properties of HMnS.…”

Section: Introductionmentioning

confidence: 99%

Effect of Element Addition and Heat Treatment Process on the Properties of High Manganese Steel

Khanh

et al. 2019

Int. J. Adv. Sci. Eng. Inf. Technol.

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The changing of properties of HMnS by alloy elements addition and heat treatment was presented. Studying about the hardness of HMnS were increased when the Mn contents increased. On the other hand, the Cr content has effective on the hardness and microstructure of this steel also, but with the Cr content was increased from 2% to 2,5%, the hardness of high Manganese steel was not much changed. With the research about HMnS, it was added the Cr and applied the advanced heat treatment process, the microstructure of this steel was formed the chrome carbide particles with grain fine which dispersed in the matrix with the formation of these dispersed carbide particles will contribute to increasing the alloy's abrasion resistance. With the difference in heat treatment processes, the microstructure and hardness were also changed. When the sample was heat-treated according to the model heat treating; the particle size of the sample is also significantly reduced. This explains why the hardness value of the sample increases significantly. Also, under the impact load, on the surface layer of this steel, the microstructure does not appear the martensite structure form but only see the twinning on the surface. These are new findings on the mechanism transformation of high manganese austenite steel when working under the impact of the impact force. The mechanism of transformation is quite different from the previous view of phase transformation under the impact force of high manganese austenitic steel.

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“…As a result, the steel/the hardness property of the steel becomes strong, while the core retains the original microstructure maintain the toughness. This phenomenon of high manganese steel is called "deformation" [6][7][8][9][10][11][12][13][14][15]. Rare earth (RE) are rare elements in the earth, including 17 elements: Scandium, Yttrium, Lanthanum...…”

Section: Introductionmentioning

confidence: 99%

Influence of Rare-Earth on the Microstructure and Mechanical Properties of High Manganese Steel Under Impact Load

Nam

Nguyen

Khanh

2019

Acta Metall Slovaca

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In this paper, the influence of rare earth (RE) on the microstructure and mechanical properties of austenitic high manganese steel (HMnS) Mn15Cr2V were investigated. The results showed that the microstructure, hardness and impact strength of RE modification sample is finer and better than non-modified sample. Under the effect of impact load, the hardness and the depth of the work-hardening layer of the modified steel was higher than that of the non-modified steel, thereby, the value of microhardness in the surface of the modified sample was 420 HV while it was only 395 HV in the non-modified sample. The value of the impact strength of the modified sample was up to 132J/cm2 compared to the non-modified sample is only 115J/cm2. Moreover, after impact load, the austenite nanoparticles had been found out on the surface of this steel, this is the cause of the increasing of mechanical properties in this steel.

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Studies on the Mechanism of Work Hardening of Austenitic High Manganese Steel Alloyed with Chromium and Vanadium

Cited by 4 publications

References 5 publications

Investigation of Microstructures Changing in High Manganese Steel Mn15Cr2V after Heat Treatment and Impacted Load

Investigation of Microstructures Changing in High Manganese Steel Mn15Cr2V after Heat Treatment and Impacted Load

Effect of Element Addition and Heat Treatment Process on the Properties of High Manganese Steel

Influence of Rare-Earth on the Microstructure and Mechanical Properties of High Manganese Steel Under Impact Load

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