Development of mechanical performance of 12YWT steel nanocomposite by addition of zirconium and tantalum

Rahmanifard, Roohollah; Farhangi, Hassan; Novinrooz, A. J.

doi:10.1016/j.jallcom.2015.10.161

Cited by 14 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen from Figure 10 and Figure 13 that alloy 2 contains a large number of finely dispersed short rod-shaped carbides (M2C), which effectively block the movement of dislocations, lath boundaries and grain boundaries under high-temperature conditions. As a result, the new alloy has a good thermal stability, and the lath martensite morphology is maintained even after a high-temperature tempering [22][23][24]. It has been reported that the addition of V can reduce the diffusion of carbon atoms by forming strong carbides in steel [21].…”

Section: Resultsmentioning

confidence: 99%

Design for Novel Hot-Work Die Steel by Thermodynamic Calculation and Microstructural Examination

Zhang

Yao

et al. 2019

Metals

View full text Add to dashboard Cite

In this paper, a new type of hot-work die steel with excellent high-temperature mechanical properties at 700 °C was designed based on the traditional 25Cr3Mo3NiNb steel with the help of Thermo-calc software. The effects of C, Cr, Mo, W and V on the types and mass fractions of carbides were studied. Phase diagram calculation revealed that with the increase of V and W contents and the decrease of Cr content, the precipitation temperature and the mass fraction of M23C6 carbides decreased. Meanwhile, the mass fraction of MC carbides increased as the Mo content decreased. Based on the thermodynamic calculation, new material 25Cr3Mo2NiWVNb steel was designed. Compared to the 25Cr3Mo3NiNb steel, more finely dispersed MC and M2C carbides with high thermal stability, as well as fewer M23C6 carbides with low thermal stability, were precipitated in the new steel. The high-temperature tensile showed that the new steel showed high thermal stability and strength even at 700 °C. The high-temperature strengthening effect might be ascribed to the fine and stable nano-scale MC and M2C carbides which precipitated during tempering.

show abstract

Section: Resultsmentioning

confidence: 99%

Design for Novel Hot-Work Die Steel by Thermodynamic Calculation and Microstructural Examination

Zhang

Yao

et al. 2019

Metals

View full text Add to dashboard Cite

show abstract

“…The topic of the impact of climate change on the life-cycle reduction has been dealt with by the author of the paper in scientific publications (11). Based on the laboratory research, the connection with the time which equipment spend in the park of the military unit (exposed to climatic changes) and the spread of corrosive attack in machine parts of military technology has been proved.…”

Section: Assessing the Impact Of Climate Change On The Parameter Affe...mentioning

confidence: 99%

“…A regression function of the hyperbolic tangens type (10), (11), (12) was used to regress the temperature dependence of the notch toughness.…”

Section: Assessing the Impact Of Climate Change On The Parameter Affe...mentioning

confidence: 99%

Simulating the Climatic Impact on Vehicle Engine Function Parts

Binar¹,

Zimáková²,

Šafl³

et al. 2021

ECS Trans.

View full text Add to dashboard Cite

The paper describes the assessment of the influence of climatic conditions, temperature and relative humidity on the lifespan of the cylinder forming the functional part of the vehicle TATRA 815 6x6 VVN. Based on the measured notch-toughness value in the test temperature range -80 °C to +100 °C, the corrosion effect on specimens with and without corrosion protection was evaluated. A condensation chamber was used to simulate corrosion conditions which can cause corrosion and degradation process in the material leading to lifetime reduction and limit state development. The duration of the corrosion laboratory tests in the condensation chamber considered the real time when the TATRA 815 6x6 VVN vehicle is exposed to climate change on an open area in the fleet. There were three sets of samples for simulations with different number of cycles (9, 18 and 27 cycles).

show abstract

“…It is known that Ta has a positive effect on the tensile and Charpy properties of RAFM steel [16,17]. Some researchers have also confirmed that the addition of Ta can effectively decrease the DBTT of 12YWT steel [18]. Ta is thus added to 14Cr ODS steel in order to improve mechanical performances.…”

Section: Introductionmentioning

confidence: 98%

Characterization of 14Cr ODS Steel Fabricated by Spark Plasma Sintering

Zhao

Qiao

Liu

et al. 2019

Metals

View full text Add to dashboard Cite

: Oxide Dispersion Strengthened (ODS) steel with a composition of Fe-14Cr-2W-0.2V-0.07Ta-1Al-0.3Y2O3 was fabricated by mechanical alloying (MA) and spark plasma sintering (SPS). All of the investigations were performed on the as-SPSed ODS sample without further heat treatment. The microstructure, particles, and tensile properties of the ODS sample were analyzed. According to the results, both submicron-sized and micron-sized grains existed in the microstructure, showing a bimodal structure. The nanoparticles were homogeneously distributed in the matrix, and the nanoparticles in the ODS sample were mainly Y-Al-O composite oxides. Two kinds of Y-Al-O nanoparticles were identified: Y3Al5O12 particles with body-centered cubic structures and Y4Al2O9 particles with monoclinic structures. The size of the nanoparticles ranged from 2 nm to 61.5 nm, and the average size of the nanoparticles was 11 ± 2.7 nm. Except for the nanoparticles, large M23C6 particles that were detrimental to the ductility of the ODS sample were also identified. These large M23C6 particles possessed a long strip or rod-like morphology, and were generally distributed along the grain boundaries. The generation of cracks generally occurred in the region where the large M23C6 particles were located during the tensile test. The as-SPSed ODS steel possessed a ductile/brittle mixed fracture mode according to the fracture surfaces analysis.

show abstract

Development of mechanical performance of 12YWT steel nanocomposite by addition of zirconium and tantalum

Cited by 14 publications

References 29 publications

Design for Novel Hot-Work Die Steel by Thermodynamic Calculation and Microstructural Examination

Design for Novel Hot-Work Die Steel by Thermodynamic Calculation and Microstructural Examination

Simulating the Climatic Impact on Vehicle Engine Function Parts

Characterization of 14Cr ODS Steel Fabricated by Spark Plasma Sintering

Contact Info

Product

Resources

About