Acicular martensite induced superior strength-ductility combination in a 20Cr2Ni2MoV steel

Wang, Y.L.; Shen, Y.F.; Jia, N.; Wang, J.J.; Zhao, Sixin

doi:10.1016/j.msea.2022.143400

Cited by 11 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strengthening effect of dislocations also contributes to strength improvement. [ 33 ] Therefore, the number of interfaces and dislocation density increase due to the microstructural refinement of the DQHT sample.…”

Section: Discussionmentioning

confidence: 99%

“…[ 35 ] Moreover, the higher density of HAGBs and LAGBs can hinder crack propagation, which leads to further toughening of the matrix. [ 33 ] Thus, the toughness of the DQHT sample increases with the population of HAGBs and LAGBs and a decrease in the packet size.…”

Section: Discussionmentioning

confidence: 99%

“…The packet structure of martensite contributes to steel toughness, and it can be effectively improved by refining the size of the packet structure [35]. Moreover, the higher density of HAGBs and LAGBs can hinder crack propagation, which leads to further toughening of the matrix [33]. Thus, the toughness of the DQHT sample increases with the population of HAGBs and LAGBs and a decrease in the packet size.Compared with conventional QT heat treatment, the steel shows a superior combination of strength and ductility at the lower requenching temperature above A c3 .…”

mentioning

confidence: 99%

See 2 more Smart Citations

Study of an Economical and Effective Heat Treatment Method to Improve the Performance of Gear Steels

Xiao

Zhang

Wang

et al. 2023

steel research int.

View full text Add to dashboard Cite

Economic and environmental concerns have recently greatly stimulated efforts to extend the service life of machine components, such as gears, shafts, and cams. These parts often suffer from cyclic loading and thus undergo a severe risk of fatigue failure. [1][2][3] Case hardening steels are widely used for producing power transmission components due to the combination of the high hardness of the case and the good toughness of the core. Different surface engineering techniques were developed, such as carburizing, nitriding, induction hardening, and shot peening. [4][5][6] Carburizing is an extensively and successively applied technology in which steel components are heated to about 930 °C and then exposed to a carbonaceous atmosphere for several hours (≥7 h), where they undergo chemical reactions. [7,8] However, high carburizing temperatures and long carburizing times may lead to grain coarsening, so the problem of austenite grain growth control is particularly prominent for carburized gear steels. [9][10][11] Nb microalloying has been recently extensively used to develop new gear steels suitable for carburizing due to the pinning effect of Nb precipitates, which suppresses the austenite growth. [8,[12][13][14] Moreover, Nb-microalloyed gear steels exhibit excellent performance, including fatigue resistance, even after high-temperature carburizing. [15,16] However, microalloying of gear steels increases smelting costs, and the extent of grain refinement is also limited. Thus, optimizing the heat treatment process is necessary to achieve the maximum grain refinement effect.Cyclic quenching treatment is beneficial for grain refinement and improving mechanical properties and has recently gained increasing attention. [17][18][19] Jiang et al. [20] applied recycling phase transformation treatment three to four times on maraging stainless steel 00Cr13Ni7Co5Mo4Ti, and the grain size was refined to 10 μm equiaxed grains from the original grain size of 180 μm and leading to the significantly improved mechanical properties. Kościelna et al. [21] investigated the influence of individual parameters of cyclic heat treatment, for example, upper cycle temperature, heating and cooling rates between room temperature and the upper cycle temperature, and the number of cycles, on the grain refinement of Ti-48Al-2Cr-2Nb alloy. The cyclic heat treatment was efficient in the grain refinement of the Ti-48Al-2Cr-2Nb alloy with an initially coarse-grained lamellar microstructure. Mishra et al. [22,23] reported a simultaneous improvement in the ductility and strength of annealed AISI 1080 steel achieved by typical cyclic heat treatment. The plasticity (elongation = 34%) and reasonable strength (UTS = 942 MPa) of the material were significantly improved after four cycles. Cyclic heat treatments are not only favorable for refining the grain size of austenite but also for carbides, improving their morphology and making the carbide distribution more uniform. The simultaneous refinement of carbides and grain size (double refinement) can signific...

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Study of an Economical and Effective Heat Treatment Method to Improve the Performance of Gear Steels

Xiao

Zhang

Wang

et al. 2023

steel research int.

View full text Add to dashboard Cite

show abstract

“…Generally, in conventional θ-particle dispersed martensite steels, coarse and angular θ particles exist on the grain boundaries, causing grain boundary fracture. [14][15][16][17][18][19][20][21] For example, in case that stress concentration occurred at the triple junction of the grain boundary, a large θ particle that existed on the grain boundary might fracture itself or weaken the grain boundary strength via the interfacial delamination between the θ particle and γ-matrix phase. Consequently, a cleavage-like intergranular fracture occurred through the grain boundary instead of an intragranular fracture.…”

Section: Fracture Morphology and Impact Propertiesmentioning

confidence: 99%

Effects of Cementite Particles on Impact Properties in High-hardness Hypereutectoid Steels

Tokunaga,

Yamamoto,

Minamino

et al. 2024

ISIJ Int.

View full text Add to dashboard Cite

In this study, we prepared hypereutectoid SUJ2 and SK3 steels with cementite (θ) particles of varying area fraction, particle size and circularity. The steels were then subjected to a specially-designed heat treatment aimed at eliminating coarse θ particles located on the grain boundaries. The effect of heat treatment on the characteristics of the θ particles and the resultant toughness were evaluated by Charpy impact tests. The designed heat treatment successfully achieved the spheroidization and annihilation of the θ particles on the grain boundaries, especially in the SUJ2 steels. Specifically, the heat-treated SUJ2 samples showed a ductile fracture surface with fine and homogeneously distributed dimples, whereas the SK3 samples showed a fracture surface with a mixture of cleavage and dimple surfaces, and grain boundary fracture was also partly observed. The impact values tended to be high when the size and area fraction of the θ particles on the grain boundaries were small. Furthermore, the circularity of the θ particles at the grain boundaries significantly influenced the impact value. It has been demonstrated that if the circularity of the θ particles is high, the impact values are less likely to deteriorate, even if there are large θ particles on the grain boundaries.

show abstract

Influence of Laminar Plasma Surface Quenching on the Tribological Properties of AISI 52100 Bearing Steel

Zhang

Gao

et al. 2023

J. of Materi Eng and Perform

View full text Add to dashboard Cite

Acicular martensite induced superior strength-ductility combination in a 20Cr2Ni2MoV steel

Cited by 11 publications

References 34 publications

Study of an Economical and Effective Heat Treatment Method to Improve the Performance of Gear Steels

Study of an Economical and Effective Heat Treatment Method to Improve the Performance of Gear Steels

Effects of Cementite Particles on Impact Properties in High-hardness Hypereutectoid Steels

Influence of Laminar Plasma Surface Quenching on the Tribological Properties of AISI 52100 Bearing Steel

Contact Info

Product

Resources

About