Effects of Modified Inclusions and Precipitates Alloyed by Rare Earth Element on Corrosion and Impact Properties in Low Alloy Steel

Lian, Xintong; Chen, Long; Fan, Zengwei; Liu, Teng-Shi; Xu, Dong; Han, Dong

doi:10.1007/s40195-022-01404-8

Cited by 18 publications

(2 citation statements)

References 34 publications

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“…It was seemingly confirmed that RE elements tend to combine with O and S preferentially, which coincides with the results of a previous study [30,31]. Based on previous research, the nano-scale precipitates had no obvious detrimental effect on the mechanical properties [32][33][34]. When Ce was added to the GH4742 alloy, it seemed to form a compound with a higher melting point, with the original compound showing a lower melting point, thus strengthening the grain boundaries and improving the stress rupture properties.…”

Section: Effects Of B and Re Elements On Stress Rupture Propertiessupporting

confidence: 90%

Synergistic Effects of Boron and Rare Earth Elements on the Microstructure and Stress Rupture Properties in a Ni-Based Superalloy

Tian,

Huang,

Qin

et al. 2024

Materials

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The synergistic effects of boron (B) and rare earth (RE) elements on the microstructure and stress rupture properties were investigated in a Ni-based superalloy. The stress rupture lifetime at 650 °C/873 MPa significantly increased with the addition of B as a single element. Furthermore, the stress rupture lifetime reached its peak (303 h), with a certain amount of B and RE added together in test alloys. Although the grain size and morphology of the γ′ phase varied a little with the change in B and RE addition, they were not considered to be the main reasons for stress rupture performance. The enhancement in stress rupture lifetime was mostly attributed to the segregation of the B and RE elements, which increased the binding force of the grain boundary and improved its strength and plasticity. In addition, the enrichment of B and RE inhabited the precipitation of carbides along grain boundaries. Furthermore, nano-scale RE precipitates containing sulfur (S) and phosphorus (P) were observed to be distributed along the grain boundaries. The purification of grain boundaries by B and RE elements was favorable to further improve the stress rupture properties.

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Section: Effects Of B and Re Elements On Stress Rupture Propertiessupporting

confidence: 90%

Synergistic Effects of Boron and Rare Earth Elements on the Microstructure and Stress Rupture Properties in a Ni-Based Superalloy

Tian,

Huang,

Qin

et al. 2024

Materials

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“…[ 38 ] The effects of crack initiation and propagation can be reduced by RE modified inclusions. [ 39 ] In the cryogenic service environment, crack extension will be accelerated when it encounters hard and angular impurity particles. In the process of fracture, when the crack encounters the soft phase of reverse austenite and fine RE impurity particles, it will stop expanding or decompose into small branches.…”

Section: Resultsmentioning

confidence: 99%

Effect of Rare Earth Cerium Replacement of Nickel on Cryogenic Toughness of 7Ni Steel

Huang

Liu

et al. 2023

steel research int.

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Effect of Rare Earth Ce on Structure and Properties in 7CrSiMnMoV Die Steel Castings

Long,

Li,

Zeng

et al. 2024

steel research int.

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In this study, rare earth (RE) Ce is used to modify the interaction between atoms in 7CrSiMnMoV die steel castings. The tensile properties are performed, and strengthening mechanism are analyzed by investigated fracture surface, and microstructure by optical microscopy (OM) and scanning electron microscope‐energy dispersive spectrometer (SEM‐EDS). And ab initio molecular dynamics (AIMD) is used to simulate the effect of the Ce element on the local atomic structure of the FeCeC system alloy steel. The results indicate the strength can increase from 722.55 to 1074.27 MPa, and the elongation can increase from 24.86% to 44.22% with a RE Ce concentration of 0.009%. It is attributed to that doping of Ce can inhibit the formation of network eutectic cementite, refine the lamellar spacing of pearlite, and even form granular cementite and martensite structures. AIMD simulation results show that C atoms tend to be surrounded by Fe, and the strong chemical bonds of FeC make the Fe‐centered C more stable with an increase in RE Ce concentration. And doping Ce can introduce new local topological and chemical orderings such that the FeCFe triplets predominantly form small and big angles shifting from near 75° and 136° to 47° and 81°, respectively.

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Effects of Modified Inclusions and Precipitates Alloyed by Rare Earth Element on Corrosion and Impact Properties in Low Alloy Steel

Cited by 18 publications

References 34 publications

Synergistic Effects of Boron and Rare Earth Elements on the Microstructure and Stress Rupture Properties in a Ni-Based Superalloy

Synergistic Effects of Boron and Rare Earth Elements on the Microstructure and Stress Rupture Properties in a Ni-Based Superalloy

Effect of Rare Earth Cerium Replacement of Nickel on Cryogenic Toughness of 7Ni Steel

Effect of Rare Earth Ce on Structure and Properties in 7CrSiMnMoV Die Steel Castings

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