Microstructural and magnetic characteristics of ceramic dispersion strengthened sintered stainless steels after thermal ageing

Balázsi, Csaba; Zine, Haroune Rachid Ben; Furkó, Mónika; Czigány, Zsolt; Almásy, László; Ryukhtin, Vasyl; Murakami, Hiroaki; Göller, Gültekin; Yücel, Onuralp; Şahin, Filiz Çınar; Balázsi, Katalin; Kobayashi, Satoru; Horváth, Ákos

doi:10.1016/j.fusengdes.2019.05.035

Cited by 4 publications

(6 citation statements)

References 14 publications

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“…Studies show that the lower milling time resulted in the formation of agglomeration of Y 2 O 3 within the metal matrix and coarse grain. A similar kind of results was reported by Balazsi et al with the development of 0.3 wt-% Y 2 O 3 in austenitic stainless steel (316L) with an average grain size of the sintered samples was of 40-100 μm [48].…”

Section: Transmission Electron Microscopysupporting

confidence: 86%

“…This caused strain to get accumulated within the powder particles during MA. Less milling duration was reported by some researchers as they have only used milling for blending of the Y 2 O 3 to the pre-alloyed mixtures which require less duration when compared with alloy development from elemental mixtures [40,47,48]. The crystallite size of the powders plays a crucial role for attaining high dense powders.…”

Section: Resultsmentioning

confidence: 99%

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Characterisation and structural transformation of yttria dispersed austenitic steel through VHP

Prasad

Pavithra

Dharmalingam

et al. 2021

Materials Science and Technology

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Two different alloys were developed from the mixtures of pre-alloyed powders consisting of ferroalloys to get the required composition of austenitic stainless steel via the powder metallurgy technique along with the presence and absence of Y2O3. The subsequent mechanical alloyed powders were subject to vacuum hot pressing at 1200°C. The samples were subject to microstructural characterisation post-vacuum hot pressing process. With the addition of yttria, the structure of the grains was fine for the mechanical alloyed vacuum hot pressed samples. The TEM analysis revealed the presence of heterogeneous distribution of yttria particles along the grain boundaries. With the addition of yttria within the metal matrix, the hot pressed density was increased marginally.

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Section: Transmission Electron Microscopysupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Characterisation and structural transformation of yttria dispersed austenitic steel through VHP

Prasad

Pavithra

Dharmalingam

et al. 2021

Materials Science and Technology

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“…This increase in the microhardness values was related to the addition of the harder nanosized alumina particles and to the presence of hardened particles as a result of the severe plastic deformation during the attrition milling process. Both the 316L/Al2O3 composites showed lower microhardness results compared with the other composites prepared by the same process [15,16,42,43] (Figure 9). It was proven by Chattopadhyay et al in their study on the microstructure/phase evolution in mechanical alloying/milling of stainless steel and aluminium powder blends that no considerable changes in the lattice parameters of the face-centred cube structure were observed in 316L alloys with an aluminium percentage lower than 25 wt% [41].…”

Section: Investigation Of the Density And Mechanical Propertiesmentioning

confidence: 99%

Novel Alumina Dispersion-Strengthened 316L Steel Produced by Attrition Milling and Spark Plasma Sintering

et al. 2023

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Alumina dispersion-strengthened 316L stainless steels were successfully produced using attrition milling and spark plasma sintering. Two different composites (316L/0.33 wt% and 316L/1 wt% Al2O3) were prepared by powder technology. The attrition milling produced a significant morphological transformation of the globular 316L starting powders and provided a homogeneous distribution of the nanosized alumina particles. The XRD results confirmed that the 316L steel was an austenitic γ-Fe3Ni2. The formation of a ferrite α-Fe phase was detected after milling; this was transformed to the austenitic γ-Fe3Ni2 after the sintering process. The addition of nanosized alumina particles increased the composites’ microhardness significantly to 2.25 GPa HV. With higher amounts of alumina, the nanosized particles tended to agglomerate during the milling process. The friction coefficient (FC) of the 316L/0.33 wt% Al2O3 and the 316L/1 wt% Al2O3 decreased because of the increase in the composite’s hardness; FC values of 0.96, 0.93 and 0.85, respectively, were measured respectively for the 316L reference, the 316L/0.33 wt% and the 316L/1 wt% Al2O3. The 316L/0.33 wt% Al2O3 composite had a higher flexural strength of 630.4 MPa compared with the 316L/1 wt% Al2O3 with 386.6 MPa; the lower value of the latter was related the agglomeration of the alumina powder during attrition milling.

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“…The boron content helps in oxidation resistance by the formation of eutectic borides, while the yttria increases the oxidation resistance by reducing porosity defect. When comparing the performance of oxide formation between yttria and boron, the later performs better than the former [61]. Spark plasma sintering is employed to fabricate the 316L steel, using silicon nitride and yttria.…”

Section: Sintering Techniquesmentioning

confidence: 99%

“…Mechanical properties of 316L stainless steel under various fabrication processes[59][60][61][71][72][73][74][75].…”

mentioning

confidence: 99%

Conventional and Additively Manufactured Stainless Steels: A Review

Michla

Rajini

Krishnasamy

et al. 2021

Trans Indian Inst Met

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For the last three decades, enormous manufacturing processes have been widely employed in the field of transportation (aviation, automobile and marine) as well as various industrial sectors. Among the invented techniques, conventional manufacturing plays a versatile and cost effective role, but additive manufacturing (AM) possesses a more significant advantage of handling complicated parts or complex geometrical structures. The conventional processes were used from ancient times until the development of other advanced techniques. In recent development of technology, AM technology has shown a tremendous change in the manufacturing field. The process of development in AM began with polymers, then to composites and advanced to nanocomposites, continuously. AM provides a waste-free production management system with enhanced processes. Therefore, this detailed and compendious review describes the different stainless steels fabricated through conventional and AM techniques. It is evident that AM proves better than other several conventional techniques, by three dimensional (3D) printing of quality and complex stainless steels components that are impossible to manufacture through other methods. Notwithstanding, there still need of much efforts to improve AM technique by reducing the manufacturing cost, supporting mass production and printing large stainless steel components.With an increase in invention of various efficient state-of-the-art engineering software, robots in manufacturing, artificial intelligence and smart manufacturing, the aforementioned drawbacks of AM technique/3D printing of various stainless steel structures will be soon eradicated.

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Microstructural and magnetic characteristics of ceramic dispersion strengthened sintered stainless steels after thermal ageing

Cited by 4 publications

References 14 publications

Characterisation and structural transformation of yttria dispersed austenitic steel through VHP

Characterisation and structural transformation of yttria dispersed austenitic steel through VHP

Novel Alumina Dispersion-Strengthened 316L Steel Produced by Attrition Milling and Spark Plasma Sintering

Conventional and Additively Manufactured Stainless Steels: A Review

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