TiC as heterogeneous nuclei of the (Fe, Mn)3C and austenite intergrowth eutectic in austenite steel matrix wear resistant composite

Xu, Zhezhuang; Liang, Gaofei; Guan, Qingfeng; Jiang, Qi‐Chuan

doi:10.1016/j.materresbull.2003.10.014

Cited by 38 publications

(10 citation statements)

References 6 publications

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“…It is well known that during solidification, the dendrite core pushes out the alloying elements with distribution coefficients ( k ) lower than unity (i.e., Mn, C, and Si) to the interdendritic region . It has been reported that the coefficient k for the Mn and C segregation are ≈0.75 and 0.28, respectively . This segregation is particularly important in TWIP steel welding, because it is favored by the high content of alloying elements .…”

Section: Resultsmentioning

confidence: 99%

Microstructural and Mechanical Characterization of Ti‐Containing Twinning‐Induced Plasticity Steel Welded Joint Produced by Gas Tungsten Arc Welding Process

Hernández-Belmontes

Mejı́a

Benito

et al. 2020

steel research int.

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The aim herein is to study the microstructural and mechanical changes generated in a welded joint of Ti‐containing twinning‐induced plasticity (TWIP) steel by the gas tungsten arc welding (GTAW) process. For this purpose, the welding parameters that allow the union of 5.6 mm‐thick butt plates with full penetration and without filler material are investigated. Microstructural changes are examined by light optical metallography. Segregation and second‐phase precipitated particles are investigated by scanning electron microscopy and electron‐dispersive spectroscopy. Phase transformations are evaluated using X‐ray diffraction. Finally, the mechanical behavior is assessed by Vickers microhardness and microtensile tests. In general, the welded joint shows dendritic structure formations in the fusion zone (FZ) and equiaxed grain growth in the heat‐affected zone (HAZ). The FZ shows a high degree of segregation, where Mn, Si, and C segregate in the interdendritic regions, whereas Al preferentially segregates in dendritic areas. In contrast, no effect on austenite stability is noticed. The welded joint shows an increase in microhardness, which is associated with the formation of precipitated particles. Finally, the microtensile results show a decrease in ultimate tensile strength (UTS) in the FZ, whereas the welding interface and HAZ show an increase in UTS compared with the base material.

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Section: Resultsmentioning

confidence: 99%

Microstructural and Mechanical Characterization of Ti‐Containing Twinning‐Induced Plasticity Steel Welded Joint Produced by Gas Tungsten Arc Welding Process

Hernández-Belmontes

Mejı́a

Benito

et al. 2020

steel research int.

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“…On the contrary, a smaller amount of carbide particles is found in the microstructure of the steels without nanosized TiC x -TiB 2 particles (Figure 5a). TiCx and TiB2 have been proven to be effective austenitic heterogeneous nucleation sites [2,10,12]. Nanoparticles are successfully introduced and dispersed into the liquid steel herein.…”

Section: Methodsmentioning

confidence: 99%

“…In addition to a large increase in the yield strength and tensile strength compared to the 40Cr steel, the fracture strain of the steel containing 0.018 wt.% TiCx-TiB2 nanoparticles is also improved. The yield and tensile strengths of the steel with 0.054 wt.% nanoparticles added are further enhanced, but the TiC x and TiB 2 have been proven to be effective austenitic heterogeneous nucleation sites [2,10,12]. Nanoparticles are successfully introduced and dispersed into the liquid steel herein.…”

Section: Methodsmentioning

confidence: 99%

“…The rapid diffusion channels and thermal mismatches produced by the grain boundaries and nanoparticles promote the diffusion of carbon and the nucleation of carbides, so there are a large number of dispersed carbides throughout the structure. TiCx and TiB2 have been proven to be effective austenitic heterogeneous nucleation sites [2,10,12]. Nanoparticles are successfully introduced and dispersed into the liquid steel herein.…”

Section: Methodsmentioning

confidence: 99%

“…Solving the problem of simultaneously improving the strength and toughness of cast steels is a long-term goal for researchers. In recent years, ceramic particles, such as TiC [1,2], TiB 2 [3,4], (NbTi)C [5] and other ceramics [6,7], have been used to enhance metallic materials because of their good thermal stability, high modulus, and good wettability with the metal matrix [6,[8][9][10][11]. The outstanding role of ceramic particles in enhancing metal properties has aroused researchers' interest [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Simultaneously Enhanced Strength, Toughness and Ductility of Cast 40Cr Steels Strengthened by Trace Biphase TiCx-TiB2 Nanoparticles

Qiu

Chang

et al. 2018

Metals

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Simultaneously improving the strength, toughness, and ductility of cast steels has always been a difficult problem for researchers. Biphase TiCx-TiB2 nanoparticle-reinforced cast steels are prepared by adding in situ nanosized biphase TiCx-TiB2/Al master alloy during the casting process. The experimental results show that a series of significant changes take place in the microstructure of the steel: the ferrite-pearlite structure of the as-cast steels and the bainite structure of the steels after heat treatment are refined, the grain size is reduced, and the content of nanoparticles is increased. Promotion of nucleation and inhibition of dendrite growth by biphase TiCx-TiB2 nanoparticles leads to a refinement of the microstructure. The fine microstructure with evenly dispersed nanoparticles offers better properties [yield strength (1246 MPa), tensile strength (1469 MPa), fracture strain (9.4%), impact toughness (20.3 J/cm2) and hardness (41 HRC)] for the steel with 0.018 wt.% biphase TiCx-TiB2 nanoparticles, which are increased by 15.4%, 31.2%, 4.4%, 11.5%, and 7.9% compared with the 40Cr steels. The higher content of nanoparticles provides higher strengths and hardness of the steel but are detrimental to ductility. The improved properties may be attributed to fine grain strengthening and the pinning effect of nanosized carbide on dislocations and grain boundaries. Through this work, it is known that the method of adding trace (0.018 wt.%) biphase TiCx-TiB2 nanoparticles during casting process can simultaneously improve the strength, toughness, as well as ductility of the cast steel.

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Microstructure and Tensile Properties of Graphite Ductile Iron Improved by Minor Amount of Dual‐Phased TiC–TiB₂ Nanoparticles

et al. 2021

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Herein, the effects of dual‐phased TiC–TiB2 nanoparticles on the microstructure and tensile properties of graphite ductile irons are investigated. Aluminum master alloys containing the TiC–TiB2 nanoparticles are utilized in the production of novel graphite ductile irons. It is found that the graphite nodules become finer with increased nodularity, smaller average diameter, and incremental amount per unit area. The thickness of ferritic and cementite layers in pearlite is reduced and the orientation becomes more regular. More ferrite is produced in the matrix after adding the nanoparticles. In tensile tests, the yield strength, tensile strength, and ductility are simultaneously improved. Also, it is determined that the cleavage and semicleavage fractures are transformed into ductile fractures after engaging the nanoparticles, which could be associated with more dimples and ductile risers being formed to promote the plastic deformation of the graphite ductile irons.

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TiC as heterogeneous nuclei of the (Fe, Mn)3C and austenite intergrowth eutectic in austenite steel matrix wear resistant composite

Cited by 38 publications

References 6 publications

Microstructural and Mechanical Characterization of Ti‐Containing Twinning‐Induced Plasticity Steel Welded Joint Produced by Gas Tungsten Arc Welding Process

Microstructural and Mechanical Characterization of Ti‐Containing Twinning‐Induced Plasticity Steel Welded Joint Produced by Gas Tungsten Arc Welding Process

Simultaneously Enhanced Strength, Toughness and Ductility of Cast 40Cr Steels Strengthened by Trace Biphase TiCx-TiB2 Nanoparticles

Microstructure and Tensile Properties of Graphite Ductile Iron Improved by Minor Amount of Dual‐Phased TiC–TiB₂ Nanoparticles

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TiC as heterogeneous nuclei of the (Fe, Mn)3C and austenite intergrowth eutectic in austenite steel matrix wear resistant composite

Cited by 38 publications

References 6 publications

Microstructural and Mechanical Characterization of Ti‐Containing Twinning‐Induced Plasticity Steel Welded Joint Produced by Gas Tungsten Arc Welding Process

Microstructural and Mechanical Characterization of Ti‐Containing Twinning‐Induced Plasticity Steel Welded Joint Produced by Gas Tungsten Arc Welding Process

Simultaneously Enhanced Strength, Toughness and Ductility of Cast 40Cr Steels Strengthened by Trace Biphase TiCx-TiB2 Nanoparticles

Microstructure and Tensile Properties of Graphite Ductile Iron Improved by Minor Amount of Dual‐Phased TiC–TiB2 Nanoparticles

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Microstructure and Tensile Properties of Graphite Ductile Iron Improved by Minor Amount of Dual‐Phased TiC–TiB₂ Nanoparticles