Nanoscale cementite and microalloyed carbide strengthened Ti bearing low carbon steel plates in the context of newly developed ultrafast cooling

Li, X.-L.; Lei, Chengshuai; Tian, Qiang; Deng, Xiaomin; Chen, L.; Gao, Peng; Du, Kaiping; Du, Yanyan; Yu, Ying Xia; Wang, Z.-D.; Misra, R.D.K.

doi:10.1016/j.msea.2017.05.066

Cited by 18 publications

(10 citation statements)

References 20 publications

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“…The lattice distances in Figure 3c are both 0.210 nm in two directions, which can be indexed to (211) and (‐211) crystal plane of Fe 3 C [8,29] . Images for other regions of the same sample are shown in Figure 3d and Figure S10 displaying the lattice distance of 0.509 nm that is ascribed to (010) plane of Fe 3 C [21] . After the H 2 pretreatment at 300 °C for 4 h, the H 2 ‐pre Fe 3 C displays lattice distance of 0.204 nm that is indexed to the (110) plane of body‐centered cubic Fe [22,30] .…”

Section: Resultsmentioning

confidence: 94%

“…Figure 2b shows the representative image of fresh catalyst. The lattice distance of the crystal in Figure 2b is 0.509 nm that is indexed to (010) plane of Fe 3 C [21] . In the representative image of the spent catalyst in Figure 2c, continuous and stacked graphene overlayers are observed, and lattice distance of the crystal substrate is 0.204 nm that is indexed to (110) plane of Fe 0 [22] .…”

Section: Resultsmentioning

confidence: 98%

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Elucidating the Active Site and the Role of Alkali Metals in Selective Hydrodeoxygenation of Phenols over Iron‐Carbide‐based Catalyst

et al. 2021

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Iron‐carbide‐based catalysts have been explored in the selective hydrodeoxygenation (HDO) of phenol, aiming at elucidating the role of active site and alkali metal. Complementary characterization such as X‐ray diffraction, X‐ray photoelectron spectroscopy, high‐resolution transmission electron microscopy, and scanning transmission electron microscopy coupled with electron energy loss spectroscopy, together with catalytic evaluations revealed a rapid structural reconstruction of iron carbide (Fe3C) catalysts, leading to a stable defective graphene‐covered metallic Fe active phase (G@Fe) under reaction conditions. Further studies using different alkali metals (i. e., Na, K, and Cs) revealed that alkali metals showed negligible effect on the phase transformation of Fe3C. However, the reconstructed G@Fe doped with alkali metals inhibited the tautomerization, a facile reaction pathway to saturation of the aromatic ring, leading to enhanced selectivity to arene. The extent of inhibition of tautomerization or selectivity to arene was closely related to the degree of electron donation of alkali metal to Fe.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 98%

Elucidating the Active Site and the Role of Alkali Metals in Selective Hydrodeoxygenation of Phenols over Iron‐Carbide‐based Catalyst

et al. 2021

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“…The TEM technique was used to investigate the category, crystal structure, and lattice parameter of the precipitates. A detailed description of the method has been listed in previously published papers [4]. In addition, Crystal Maker software was used for the simulation of the unit cell structure to clearly present the orientation relationship between the precipitates and ferrite matrix.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

“…Besides microalloying, the thermomechanical controlled processing (TCMP) technique has also been proposed and studied extensively. Wang and his group at Northeastern University studied the effect of TMCP parameters, including hot-rolling temperature [2,3], cooling rate [3], and finish cooling temperature [4][5][6], on the mechanical properties of medium thickness microalloyed steel plates. Nishioka published a review describing the metallurgical aspects of the microalloying in steel, and discussing the advantages of TMCP, for example, in terms of weldability, which is reduced upon alloying [7].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Ti-Microalloyed Steel Plates

et al. 2022

Materials

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Ti-bearing microalloyed steel plates with a thickness of 40 mm were subjected to ultra-fast cooling (UFC) and traditional accelerate cooling after hot-rolling, aiming to investigate the effect of cooling rate on the microstructure and mechanical properties homogeneity, and thus obtain thick plates with superior and homogeneous mechanical properties. Yield strength, tensile strength, and elongation were 642 MPa, 740 MPa, 19.2% and 592 MPa, 720 MPa and 16.7%, respectively, in the surface and mid-thickness of the steel with ultra-fast cooling, while in the steel with traditional accelerate cooling, 535 MPa, 645 MPa, 23.4% and 485 MPa, 608 MPa, 16.2% were obtained in the surface and mid-thickness of the plate. The yield strength has been greatly improved after UFC, for the refinement of grain and precipitates produced by UFC. In addition, the equivalent grain size and precipitates size in the thick plate with UFC are homogeneous in the thickness direction, leading to uniform mechanical properties. The crystallographic characteristics of different precipitates have been studied. The precipitates formed in the austenite deformation stage obey Kurdjumov–Sachs orientation relationship with the ferrite matrix, while the fine precipitates formed in the ferrite obey [112]MC//[110]α and (1¯1¯1)MC//(1¯12)α orientation relationship with the ferrite matrix.

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“…CMRR runs about 150 days/year at present, and approximately half of the whole beam time of SANS‐ Suanni is assigned to users. A variety of sample environmental devices, such as temperature oven, rheo‐SANS, magnetic field, were developed. The numbers of beam‐time proposals and publications of SANS‐ Suanni are increasing continuously …”

Section: Introductionmentioning

confidence: 99%

Multiscale characterization of semicrystalline polymeric materials by synchrotron radiation X‐ray and neutron scattering

Chen

Liu

2018

Polymer Crystallization

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Synchrotron radiation (SR) X‐ray and neutron scattering provide excellent probes for the investigation of polymeric material. Based on high brilliant beam with a tunable wavelength of SR, scattering techniques with high time and spatial resolutions have been developed for in situ X‐ray study on polymeric materials. With the isotopic sensitivity of neutron, the detailed single chain behavior can be isolated from the polymeric matrix under variant conditions with the help of deuterium labeling and contrast variation/matching. With examples on flow‐induced crystallization of polymer and hierarchical structure decomposition of polymer nanocomposite, current review attempts to present the advantages of SR X‐ray and neutron scattering in the study of hierarchical and multiscale structural evolutions of polymeric materials. With time resolution up to sub‐ms and spatial resolution of 100 nm, SR is expected to promote the understanding of non‐equilibrium polymer physics under processing. With the ability to “see” the single chain conformation and turn the contrast of the multicomponent polymeric composites, neutron scattering can benefit the progress of polymer science. Platform based on SR and neutron source provide promising of establishing polymer Materials Genome database, which might strongly benefit industrial processing and accelerate the progress of material innovation.

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Nanoscale cementite and microalloyed carbide strengthened Ti bearing low carbon steel plates in the context of newly developed ultrafast cooling

Cited by 18 publications

References 20 publications

Elucidating the Active Site and the Role of Alkali Metals in Selective Hydrodeoxygenation of Phenols over Iron‐Carbide‐based Catalyst

Elucidating the Active Site and the Role of Alkali Metals in Selective Hydrodeoxygenation of Phenols over Iron‐Carbide‐based Catalyst

The Effect of Cooling Rate on the Microstructure Evolution and Mechanical Properties of Ti-Microalloyed Steel Plates

Multiscale characterization of semicrystalline polymeric materials by synchrotron radiation X‐ray and neutron scattering

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