Influence of final rolling temperature on microstructure and mechanical properties in a hot-rolled TWIP steel for cryogenic application

Chen, Jun; Dong, Futao; Jiang, Hailong; Liu, Zhenyu; Wang, Guodong

doi:10.1016/j.msea.2018.03.111

Cited by 34 publications

(17 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been demonstrated that the cryogenic impact toughness of high-Mn austenitic steel has a strong relation to the twinning behavior [33,34]. We also observed that mechanical twins play an important role in crack nucleation and propagation (Figure 5c).…”

Section: Deformation Behavior Under Cryogenic-temperature Impact Loadingsupporting

confidence: 57%

“…Wang et al [39] reported that the impact absorbed energy of a Ti-V-Mocontaining high-Mn steel increases from 84 J to 166 J as the grain size increases from 10.4 μm to 21.7 μm by solution treatment. Chen et al [34] also demonstrated that the impact absorbed energy of a hot-rolled TWIP steel can be enhanced by ~26 J as the grain size increases from 8.5 μm to 17.3 μm without much sacrifice of yield strength. These results imply that the larger grain size is benefit to the cryogenic impact toughness of high-Mn austenitic steel.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

On Mechanical Properties of Welded Joint in Novel High-Mn Cryogenic Steel in Terms of Microstructural Evolution and Solute Segregation

Ren¹,

Chen²,

Liu³

2020

Metals

Self Cite

View full text Add to dashboard Cite

There is a growing demand for high-manganese wide heavy steel plate with excellent welding performance for liquefied natural gas (LNG) tank building. However, studies on welding of high-Mn austenitic steel have mainly focused on the applications of automotive industry for a long time. In the present work, a high-Mn cryogenic steel was welded by multi-pass Shielded Metal Arc Welding (SMAW), and the microstructural evolution, solute segregation and its effect on the properties of welded joint (WJ) were studied. The yield strength, tensile strength and elongation of the WJ reached 804 MPa, 1027 MPa and 11.2% at −196 °C, respectively. The elongation of WJ was reduced with respect to the BM due to the poorer strain hardening capacity of weld metal (WM) at −196 °C. The WM and coarse-grained heat affected zone (CGHAZ) had the lowest cryogenic impact absorbed energy of ~55 J (at −196 °C). The inhibited twin formation caused by the higher critical resolved shear twinning stress ( τ T ) in the C-Mn-Si segregation band, the inhomogeneous microstructure caused by solute segregation, and the hardened austenite matrix deteriorated the plastic deformation capacity, finally resulting in the decreased cryogenic impact toughness of the CGHAZ. To summarize, the cryogenic toughness and tensile properties of the WJ meet the requirements for LNG tank building.

show abstract

Section: Deformation Behavior Under Cryogenic-temperature Impact Loadingsupporting

confidence: 57%

Section: Discussionmentioning

confidence: 99%

On Mechanical Properties of Welded Joint in Novel High-Mn Cryogenic Steel in Terms of Microstructural Evolution and Solute Segregation

Ren¹,

Chen²,

Liu³

2020

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Generally, the microstructure can be refined with the increase of total rolling reduction and thereby improving the mechanical properties [10][11][12]. A lot of work has been done with respect to the effect of FRT on microstructure and mechanical properties of HSLA steels [13][14][15][16][17][18][19][20][21][22]. The principal conclusion that can be drawn from these studies is that a higher FRT usually results in a recrystallized structure while elongated or acicular ferrite can be obtained at a lower FRT.…”

Section: Introductionmentioning

confidence: 99%

“…The grain size can be refined and the mechanical properties may be improved with the decrease in FRT irrespective of within recrystallization temperature (T r ) or below non-recrystallization temperature (T nr ). For instance, Chen et al showed that recrystallized microstructure was obtained with FRT within T r and the grain size can be refined from 17.3 to 8.5 μm by decreasing 1 3 FRT from 1083 to 966 °C [20]. Saastamoinen et al [21] revealed that the FRT within T nr also resulted in fine effective grain size and improved impact toughness for a directquenched steel.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Improving Mechanical Properties and Stress Corrosion Cracking Resistance of High-Strength Low-Alloy Steel via Finish Rolling within Non-recrystallization Temperature

Zhao

Yang

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

The effect of hot rolling process on microstructure evolution, mechanical properties and stress corrosion cracking (SCC) resistance of high-strength low-alloy (HSLA) steels was investigated by varying the finish rolling temperature (FRT) and total rolling reduction. The results revealed granular bainite with large equiaxed grains was obtained by a total rolling reduction of 60% with the FRT of 950 °C (within recrystallization temperature T r ). The larger grain size and much less grain boundaries should account for the relatively lower strength and SCC resistance. A larger rolling reduction of 80% under the same FRT resulted in the formation of massive martensite-austenite (M/A) constituents and resultant low ductility and SCC resistance. In contrast, a good combination of strength, ductility and SCC resistance was obtained via 80% rolling reduction with the FRT of 860 °C (within non-recrystallization temperature T nr ), probably because of the fine grain size and M/A constituents, as well as a high density of grain boundary network.

show abstract

“…The development of TWIP steel with an excellent combination of elongation and tensile strength has become a hot topic 5–10 . At present, research mainly focuses on the structure and properties of TWIP steel 11–13 . But the study on the solidification process and crack sensitivity is rare, especially for the latest Fe-Mn-C-Al TWIP steel; its solidification mode under high-temperature process has not been reported 14,15 .…”

Section: Introductionmentioning

confidence: 99%

Study on high temperature solidification behavior and crack sensitivity of Fe-Mn-C-Al TWIP steel

Zhuang

Liu

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Fe-Mn-C-Al alloy is a new steel grade of TWIP steel developed in recent years. It has an excellent combination of elongation and tensile strength, as well as good anti-delayed fracture property. However, the crack sensitivity of this new TWIP steel has not been reported yet. In this study, differential thermal analysis (DTA) method was used, combined with professional thermodynamic software ThermoCalc to analyze the solidification behavior for Fe-Mn-C-Al alloys with different chemical compositions. Based on this, the crack sensitivity of TWIP steel is further determined. Through this study, it was found that Fe-Mn-C-Al TWIP steel may have a solidification sequence with high crack sensitivity, belonging to hypo-peritectic steel. Moreover, it was found that the carbon content has a large influence on the solidification behavior, and the manganese content also affects the solidification sequence. It can make the phase transition sequence of the solidification process change significantly, which may avoid the solidification behavior of hypo-peritectic reaction. The analysis results by thermodynamic software ThermoCalc are in good agreement with the experimental results. It displays thermoCalc can be a cost-effective way to develop Fe-Mn-C-Al TWIP steel. It is of great significance for shortening the development period of new Fe-Mn-C-Al steel grades.

show abstract

Influence of final rolling temperature on microstructure and mechanical properties in a hot-rolled TWIP steel for cryogenic application

Cited by 34 publications

References 17 publications

On Mechanical Properties of Welded Joint in Novel High-Mn Cryogenic Steel in Terms of Microstructural Evolution and Solute Segregation

On Mechanical Properties of Welded Joint in Novel High-Mn Cryogenic Steel in Terms of Microstructural Evolution and Solute Segregation

Simultaneously Improving Mechanical Properties and Stress Corrosion Cracking Resistance of High-Strength Low-Alloy Steel via Finish Rolling within Non-recrystallization Temperature

Study on high temperature solidification behavior and crack sensitivity of Fe-Mn-C-Al TWIP steel

Contact Info

Product

Resources

About