Thermodynamic Stacking Fault Energy, Chemical Composition, and Microstructure Relationship in High-Manganese Steels

2020 ◽  
Vol 51 (9) ◽  
pp. 4812-4825
Author(s):  
Giovani Gonçalves Ribamar ◽  
Tathiane Caminha Andrade ◽  
Hélio Cordeiro de Miranda ◽  
Hamilton Ferreira Gomes de Abreu
Keyword(s):  
Chemical Composition ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Manganese ◽  
High Manganese Steels ◽  
Manganese Steels

Stacking fault energy and plastic deformation of fully austenitic high manganese steels: Effect of Al addition

2010 ◽  
Vol 527 (16-17) ◽  
pp. 3651-3661 ◽  
Author(s):  
Kyung-Tae Park ◽  
Kwang Geun Jin ◽  
Sang Ho Han ◽  
Si Woo Hwang ◽  
Kayoung Choi ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
High Manganese ◽  
High Manganese Steels ◽  
Al Addition ◽  
Manganese Steels

Melting and Solidification in the System Fe-Mn-C

2010 ◽  
Vol 638-642 ◽  
pp. 3117-3122
Author(s):  
A. Lob ◽  
Dieter Senk ◽  
S. Geimer
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Deformation Mechanism ◽  
High Manganese ◽  
Critical Elements ◽  
High Manganese Steels ◽  
Solidification Parameters ◽  
Manganese Steels ◽  
Melting And Solidification

At the Department of Ferrous Metallurgy (IEHK) steels grades in the system Fe-Mn-C are under investigation, because extraordinary mechanical properties of these steels result from the metal-physical deformation-mechanism. The microstructure forming and the deformation-mechanism are regulated by the chemical composition. The aim of the project, in the frame of SFB 761, is focused on the formation of model materials with different alloying composition and cooling rates, as well as the determination of melting and solidification parameters and their influencing factors. One task is the metallurgical treatment of critical elements for high manganese steels; the gases hydrogen, nitrogen and oxygen. A problem to be solved is that the melting of high manganese steels tends to manganese losses in the liquid.

Structural features and strength behavior of TRIP/TWIP steels

2020 ◽  
pp. 5-18
Author(s):  
D. V. Prosvirnin ◽  
◽  
M. S. Larionov ◽  
S. V. Pivovarchik ◽  
A. G. Kolmakov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Thermomechanical Processing ◽  
Maximum Load ◽  
Structural Features ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Structural And Functional Properties ◽  
Twip Steels ◽  
The Creation

A review of the literature data on the structural features of TRIP / TWIP steels, their relationship with mechanical properties and the relationship of strength parameters under static and cyclic loading was carried out. It is shown that the level of mechanical properties of such steels is determined by the chemical composition and processing technology (thermal and thermomechanical processing, hot and cold pressure treatment), aimed at achieving a favorable phase composition. At the atomic level, the most important factor is stacking fault energy, the level of which will be decisive in the formation of austenite twins and / or the formation of strain martensite. By selecting the chemical composition, it is possible to set the stacking fault energy corresponding to the necessary mechanical characteristics. In the case of cyclic loads, an important role is played by the strain rate and the maximum load during testing. So at high loading rates and a load approaching the yield strength under tension, the intensity of the twinning processes and the formation of martensite increases. It is shown that one of the relevant ways to further increase of the structural and functional properties of TRIP and TWIP steels is the creation of composite materials on their basis. At present, surface modification and coating, especially by ion-vacuum methods, can be considered the most promising direction for the creation of such composites.

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