Advanced mechanical properties obtained via accurately tailoring stacking fault energy in Co-rich and Ni-depleted CoxCr33Ni67-x medium-entropy alloys

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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Effect of stacking fault energy on the restoration mechanisms and mechanical properties of friction stir welded copper alloys

Materials & Design ◽

10.1016/j.matdes.2018.11.050 ◽

2019 ◽

Vol 162 ◽

pp. 185-197 ◽

Cited By ~ 34

Author(s):

Akbar Heidarzadeh ◽

Tohid Saeid ◽

Volker Klemm ◽

Ali Chabok ◽

Yutao Pei

Keyword(s):

Mechanical Properties ◽

Copper Alloys ◽

Stacking Fault ◽

Stacking Fault Energy ◽

Friction Stir

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Effect of stacking fault energy on mechanical properties and strengthening mechanisms of brasses processed by cryorolling

Materials Characterization ◽

10.1016/j.matchar.2015.10.006 ◽

2015 ◽

Vol 110 ◽

pp. 14-24 ◽

Cited By ~ 9

Author(s):

S.M. Dasharath ◽

Carl C. Koch ◽

Suhrit Mula

Keyword(s):

Mechanical Properties ◽

Stacking Fault ◽

Stacking Fault Energy ◽

Strengthening Mechanisms

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The influence of stacking fault energy on the mechanical properties of nanostructured Cu and Cu–Al alloys processed by high-pressure torsion

Scripta Materialia ◽

10.1016/j.scriptamat.2011.01.041 ◽

2011 ◽

Vol 64 (10) ◽

pp. 954-957 ◽

Cited By ~ 92

Author(s):

X.H. An ◽

Q.Y. Lin ◽

S.D. Wu ◽

Z.F. Zhang ◽

R.B. Figueiredo ◽

...

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

High Pressure Torsion ◽

Al Alloys ◽

Stacking Fault ◽

Stacking Fault Energy

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Role of geometrically necessary dislocations on mechanical properties of friction stir welded single-phase copper with medium stacking fault energy

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2021.11.162 ◽

2021 ◽

Author(s):

Akbar Heidarzadeh ◽

Roghayeh Mohammadzadeh ◽

Hamid Reza Jafarian ◽

Catalin Pruncu ◽

Aude Simar

Keyword(s):

Mechanical Properties ◽

Single Phase ◽

Stacking Fault ◽

Stacking Fault Energy ◽

Friction Stir

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Modeling of Stacking Fault Energy in Hexagonal-Close-Packed Metals

Advances in Materials Science and Engineering ◽

10.1155/2015/639519 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

Zhigang Ding ◽

Shuang Li ◽

Wei Liu ◽

Yonghao Zhao

Keyword(s):

Mechanical Properties ◽

Ising Model ◽

Theoretical Background ◽

Stacking Fault ◽

Stacking Fault Energy ◽

Hexagonal Close Packed ◽

Orientation Model ◽

Generalized Stacking Fault ◽

Supercell Model ◽

Stacking Fault Energies

The deformation of metals is known to be largely affected by their stacking fault energies (SFEs). In the review, we examine the theoretical background of three normally used models, supercell model, Ising model, and bond orientation model, for the calculation of SFE of hexagonal-close-packed (hcp) metals and their alloys. To predict the nature of slip in nanocrystalline metals, we further review the generalized stacking fault (GSF) energy curves in hcp metals and alloys. We conclude by discussing the outstanding challenges in the modeling of SFE and GSF energy for studying the mechanical properties of metals.

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