The effects of a ferritic or martensitic matrix on the tensile behavior of a nano-precipitation strengthened ultra-low carbon Ti–Mo–Nb steel

Cai, Minghui; Chen, Liu-Gu; Fang, Kai; Huang, Hongshou; Hodgson, Peter

doi:10.1016/j.msea.2020.140410

Cited by 27 publications

(11 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The major advantage of the studied model alloy is the fact that austenite phase is stable at room temperature. In the investigated material, a micro-alloying addition of Nb was added to cause a precipitation strengthening mechanism, which plays a significant role in the formation of the dislocation substructure [12][13][14][15]. The initial microstructure of the investigated material is presented in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Full-Field Strain Measurement and Numerical Analysis of a Microalloyed Steel Subjected to Deformation with Strain Path Change

2020

View full text Add to dashboard Cite

This study presents an effective technique for taking advantage of the full-field measurement method of Digital Image Correlation (DIC) for the assessment of the strain distribution during the metal forming process when the strain path change was performed. The applied methodology is based on the combination of a numerical simulation for the stress calculation and full-field surface strain measurement in a forward/reverse three-point bending test. In the numerical part, the Chaboche model and dislocation density-based model were selected and verified in terms of the prediction of a softening/hardening effect occurring during strain reversal. The Chaboche model parameters identification procedure, on the basis of a cyclic torsion test, combined with inverse analysis, was also described. The results of the study showed the advantages and disadvantages of both of the analyzed work hardening models. The obtained results were analyzed in the light of the deformation inhomogeneity and reorganization of the dislocation structure during the cyclic deformation test.

show abstract

Section: Methodsmentioning

confidence: 99%

Full-Field Strain Measurement and Numerical Analysis of a Microalloyed Steel Subjected to Deformation with Strain Path Change

2020

View full text Add to dashboard Cite

show abstract

“…Some carbides can be observed in the martensitic lath with a relatively h density of dislocations, as shown in Figure 3b. The high strength of the investigated st plate was attributed to the solid solution strengthening, precipitation strengthening, gr boundary strengthening, and dislocation strengthening of the fine martensitic mat [2,18]. Figure 4 shows the size distribution of the TiN inclusions at 1/4 and 1/2 thickness the plate.…”

Section: Microstructural Featuresmentioning

confidence: 99%

“…NM550 wear-resistant steel has high strength and toughness and excellent wear resistance, and is widely used in large-scale engineering and mining machinery under extremely harsh working conditions [1]. Many studies have reported that trace elements such as Ti, Nb, V, and B can improve the performance of steel by microalloying [1][2][3]. For solid solution in austenite, B segregates at the austenite grain boundary during the cooling process and inhibits the nucleation of grain boundary ferrite, improving the hardenability of steel, which in turn, substantially improves the uniformity of the properties and microstructure of the steel plate [3,4].…”

Section: Introductionmentioning

confidence: 99%

Study of the Fracture Behavior of TiN and TiC Inclusions in NM550 Wear-Resistant Steel during the Tensile Process

Liu

Zhong-yang

Liu

et al. 2022

Metals

View full text Add to dashboard Cite

NM550 wear-resistant steel is widely used in large-scale engineering and mining machinery under extremely harsh working conditions. In NM550 steel, the addition of Ti can cause the formation of micron-scale TiN and TiC inclusions, easily triggering cleavage fractures. The fracture behavior and precipitation rule of micron-scale TiN and TiC inclusions on the tensile process in NM550 steel was investigated by scanning electron microscopy, transmission electron microscopy, and energy spectrum analysis combined with thermodynamic theory. The TiN precipitated in the solid–liquid two-phase region at a precipitation temperature of 1710 K, whereas that of TiC was 1158 K along the austenite grain boundary. The sizes of the TiN precipitated in the liquid phase and the TiC precipitated in austenite were both at the micron scale, which is prone to cleavage fracture during the stretching process. Under tensile stress, microcracks were first initiated at the TiN inclusion, which were further separated forming a hole, whereas the TiC inclusion was divided into two sections with a long and narrow gap formed between the substrates. The sizes of the TiN and TiC were related to the cooling rate, Ti, and N contents. The larger the cooling rate and the lesser the Ti and N content, the smaller the TiN and TiC sizes.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Recently, the literature [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ] reported that adding Nb or V to Ti−Mo steel could further optimize microstructures and improve mechanical properties. Cai et al [ 10 ] improved the yield strength of ultra-low carbon Ti−Mo steel to 680 MPa by adding Nb. Bu et al [ 11 ] reported that the interphase precipitation in Ti−Mo−Nb steel could provide precipitation strengthening of ~320 MPa, resulting in its yield strength up to 747 MPa.…”

Section: Introductionmentioning

confidence: 99%

Effect of V on the Precipitation Behavior of Ti−Mo Microalloyed High-Strength Steel

Han

Yang

et al. 2022

Materials

View full text Add to dashboard Cite

In this work, the precipitates in Ti−Mo−V steel were systematically characterized by high-resolution transmission electron microscopy (HRTEM). The thermodynamics and kinetics of precipitates in Ti−Mo and Ti−Mo−V steels were theoretically analyzed, and the effect of vanadium on the precipitation behavior was clarified. The results showed that the precipitation volume fraction of the Ti−Mo−V steel was significantly higher than that of Ti−Mo steel. The randomly dispersed precipitation and interphase precipitation (Ti, Mo, V)C particles coexisted in the Ti−Mo−V steel. When the temperature was higher than 872 °C, the addition of vanadium could increase the driving force for (Ti, Mo, V)C precipitation in austenite, resulting in an increased nucleation rate and shortened incubation period, promoting the (Ti, Mo, V)C precipitation. When the temperature was lower than 872 °C, the driving force for (Ti, Mo, V)C precipitation in austenite was lower than that for (Ti, Mo)C precipitation, and the incubation period of (Ti, Mo, V)C precipitation was increased. Moreover, it was also found that the precipitated-time-temperature curve of (Ti, Mo, V)C precipitated in the ferrite region was “C” shaped, but that of (Ti, Mo)C was “ε” shaped, and the incubation period of (Ti, Mo, V)C was significantly shorter than that of (Ti, Mo)C.

show abstract

The effects of a ferritic or martensitic matrix on the tensile behavior of a nano-precipitation strengthened ultra-low carbon Ti–Mo–Nb steel

Cited by 27 publications

References 40 publications

Full-Field Strain Measurement and Numerical Analysis of a Microalloyed Steel Subjected to Deformation with Strain Path Change

Full-Field Strain Measurement and Numerical Analysis of a Microalloyed Steel Subjected to Deformation with Strain Path Change

Study of the Fracture Behavior of TiN and TiC Inclusions in NM550 Wear-Resistant Steel during the Tensile Process

Effect of V on the Precipitation Behavior of Ti−Mo Microalloyed High-Strength Steel

Contact Info

Product

Resources

About