Effect of the Removal of a Surface Layer on the Mechanical Properties and the Static Stress–Strain Curves of an Austenitic–Martensitic Sheet TRIP Steel

Терентьев, В. Ф.; Slizov, A. K.; Prosvirnin, D. V.; Ашмарин, А. А.; Сиротинкин, В. П.; Rybalchenko, O. V.; Kaplan, M. A.; Баикин, А. С.

doi:10.1134/s0036029518040183

Cited by 1 publication

(2 citation statements)

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“…Since TRIP steels are used in the most critical units and structures, this information is not sufficient for drawing conclusions concerning the durability of products made of this material. The authors of [24][25][26][27][28][29] considered the features of defor-mation for austenitic-martensitic VNS-9Sh grade TRIP steel (Table 1). In order to systematize the obtained data, the studies were carried out using samples of different shape.…”

Section: Connection Between Strength Parameters Under Static and Cyclic Loading By The Example Of Vns-9sh Grade Trip Steelmentioning

confidence: 99%

“…Accordingly, the phase composition of surface layers and its effect on the mechanical properties of TRIP steel products remains an important issue. The authors of [28,29] have revealed that the optimal content of strain martensite on the surface is in the range of 45-60% and determined the fatigue limit σ R in the range from 750 to 900 MPa.…”

Section: Connection Between Strength Parameters Under Static and Cyclic Loading By The Example Of Vns-9sh Grade Trip Steelmentioning

confidence: 99%

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Structural Features and Strength Behavior of TRIP/TWIP Steels

Prosvirnin

Larionov

Pivovarchik

et al. 2021

Inorg. Mater. Appl. Res.

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A review of the published data concerning the structural features of TRIP/TWIP steels, the relationship thereof to mechanical properties, and the relationship between strength parameters under static and cyclic loading is presented. 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 represented by stacking fault energy, the level of which is decisive in the formation of austenite twins and/or in the formation of strain martensite. By choosing the chemical composition, one can set the level of stacking fault energy corresponding to the required mechanical characteristics. In the case of cyclic loading, an important role is played by the strain rate and the maximum load in the course of testing. So, at a high loading rate and a load approaching the yield strength under tension, the intensity of twinning processes and the rate of formation of martensite increases. It has been shown that one of the relevant ways to further improving the structural and functional properties of TRIP and TWIP steels consists in developing composite materials based on them. At present, surface modification and coating application, especially by means ion-vacuum methods, can be considered the most promising direction for making such composites.

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