Dynamic tension–compression asymmetry of martensitic transformation in austenitic Fe–(0.4, 1.0)C–18Mn steels for cryogenic applications

Kim, Hyunmin; Park, Jaeyoung; Ha, Yumi; Kim, Wooyeol; Sohn, Seok Su; Kim, Hyoung Seop; Lee, Byeong-Joo; Kim, Nack J.; Lee, Sunghak

doi:10.1016/j.actamat.2015.06.021

Cited by 36 publications

(18 citation statements)

References 41 publications

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“…A difference between the martensitic phase transformations occurring during tensile and compression tests was also observed for Fe-0.4C-18Mn steel. [49] In that material system, a transformation sequence of c-austenite fi e-martensite fi a¢-martensite occurred during tension at À 196°C, while after the compression test, only e-martensite was found (i.e., no a¢-martensite). In present study, e-martensite was observed only with a small fraction after compression together with a considerable amount of a¢-martensite.…”

Section: In Directions 111mentioning

confidence: 85%

“…Although the volume difference between austenite and martensite phases is an essential factor causing tension-compression asymmetry in steels, [49] other effects, such as the different evolutions of lattice defects in the two deformation modes, may also play a significant role in the different stress-strain responses detected during tension and compression. In this paper, an in-depth study of the mechanical response obtained in tension and compression of a textured 316L steel is presented, and the reasons of the tension-compression asymmetry are investigated in detail.…”

Section: Introductionmentioning

confidence: 99%

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Different Evolutions of the Microstructure, Texture, and Mechanical Performance During Tension and Compression of 316L Stainless Steel

El-Tahawy

Jenei

Kolonits

et al. 2020

Metall Mater Trans A

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The tensile and compressive behaviors of 316L stainless steel at room temperature were compared. The differences between the stress–strain responses during tension and compression were explained by the different evolutions of the texture, defect structure, and phase composition. It was found that up to true strain of ~ 25 pct the flow stress during tension was only slightly higher (by ~ 40 MPa) than that during compression, which can be explained by the different textures of the two types of specimens. On the other hand, between the strains of 25 and 50 pct, the strain hardening for tension was much higher, which resulted in a ~ 200 MPa larger flow stress in the tensile-tested specimen at 50 pct strain. It was revealed that the higher flow stress in tension was caused by the harder texture, the higher dislocation density, and the larger fraction of martensite phase.

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Section: In Directions 111mentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Different Evolutions of the Microstructure, Texture, and Mechanical Performance During Tension and Compression of 316L Stainless Steel

El-Tahawy

Jenei

Kolonits

et al. 2020

Metall Mater Trans A

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“…Plate-shaped tensile specimens (gage length; 30 mm, width; 5 mm, thickness; 1 mm, longitudinal orientation) were tested at strain rate of 10 −3 s −1 at room temperature by a universal testing machine (capacity; 100 kN, model; Instron 8801, Instron Corp., Canton, MA, USA). A split Hopkinson tensile bar was used for dynamic tensile tests 26 , 48 – 50 , whose schematic diagram is presented in Supplementary Fig. S3 .…”

Section: Methodsmentioning

confidence: 99%

“…The strain rate was about 3000 s -1 . Detailed descriptions of the dynamic test are provided in references 26 , 48 – 50 . In order to reduce noises in the data, raw stress-strain curves were smoothened by an adjacent-averaging method 51 , 52 .…”

Section: Methodsmentioning

confidence: 99%

Interpretation of dynamic tensile behavior by austenite stability in ferrite-austenite duplex lightweight steels

Park

Jeong

et al. 2017

Sci Rep

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Phenomena occurring in duplex lightweight steels under dynamic loading are hardly investigated, although its understanding is essentially needed in applications of automotive steels. In this study, quasi-static and dynamic tensile properties of duplex lightweight steels were investigated by focusing on how TRIP and TWIP mechanisms were varied under the quasi-static and dynamic loading conditions. As the annealing temperature increased, the grain size and volume fraction of austenite increased, thereby gradually decreasing austenite stability. The strain-hardening rate curves displayed a multiple-stage strain-hardening behavior, which was closely related with deformation mechanisms. Under the dynamic loading, the temperature rise due to adiabatic heating raised the austenite stability, which resulted in the reduction in the TRIP amount. Though the 950 °C-annealed specimen having the lowest austenite stability showed the very low ductility and strength under the quasi-static loading, it exhibited the tensile elongation up to 54% as well as high strain-hardening rate and tensile strength (1038 MPa) due to appropriate austenite stability under dynamic loading. Since dynamic properties of the present duplex lightweight steels show the excellent strength-ductility combination as well as continuously high strain hardening, they can be sufficiently applied to automotive steel sheets demanded for stronger vehicle bodies and safety enhancement.

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“…Recently, high manganese austenitic steels were shown to act as a candidate cryogenic material for liquefied natural gas (LNG) transportation by ship and truck due to their extraordinary cryogenic mechanical properties and relatively low cost compared with conventional cryogenic materials [ 6 , 7 , 8 ]. Moreover, tensile and impact properties at room temperature and 77 K, as well as corresponding deformation mechanisms, were investigated in detail [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ], indicating that these steels have potential applications in the LNG field, and they have been used in LNG tank building. However, there are few data on plastic properties of high manganese austenitic steels at a temperature as low as 4 K. These extremely cryogenic plastic properties determine whether they can be used in extremely cryogenic fields, such as liquid hydrogen and liquid helium.…”

Section: Introductionmentioning

confidence: 99%

Temperature Dependence of Deformation Behaviors in High Manganese Austenitic Steel for Cryogenic Applications

Chen

Ren

et al. 2021

Materials

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The deformation structure and its contribution to strain hardening of a high manganese austenitic steel were investigated after tensile deformation at 298 K, 77 K and 4 K by means of electron backscatter diffraction and transmission electron microscopy, exhibiting a strong dependence of strain hardening and deformation structure on deformation temperature. It was demonstrated that sufficient twinning indeed provides a high and stable strain hardening capacity, leading to a simultaneous increase in strength and ductility at 77 K compared with the tensile deformation at 298 K. Moreover, although the SFE of the steel is ~34.4 mJ/m2 at 4 K, sufficient twinning was not observed, indicating that the mechanical twinning is hard to activate at 4 K. However, numerous planar dislocation arrays and microbands can be observed, and these substructures may be a reason for multi-peak strain hardening behaviors at 4 K. They can also provide certain strain hardening capacity, and a relatively high total elongation of ~48% can be obtained at 4 K. In addition, it was found that the yield strength (YS) and ultimate tensile strength (UTS) linearly increases with the lowering of the deformation temperature from 298 K to 4 K, and the increment in YS and UTS was estimated to be 2.13 and 2.43 MPa per 1 K reduction, respectively.

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Dynamic tension–compression asymmetry of martensitic transformation in austenitic Fe–(0.4, 1.0)C–18Mn steels for cryogenic applications

Cited by 36 publications

References 41 publications

Different Evolutions of the Microstructure, Texture, and Mechanical Performance During Tension and Compression of 316L Stainless Steel

Different Evolutions of the Microstructure, Texture, and Mechanical Performance During Tension and Compression of 316L Stainless Steel

Interpretation of dynamic tensile behavior by austenite stability in ferrite-austenite duplex lightweight steels

Temperature Dependence of Deformation Behaviors in High Manganese Austenitic Steel for Cryogenic Applications

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