Powder metallurgy of stainless steels and composites: a review of mechanical alloying and spark plasma sintering

Oke, Samuel Ranti; Ige, Oladeji Oluremi; Falodun, Oluwasegun Eso; Okoro, Avwerosuoghene Moses; Mphahlele, Mahlatse R.; Olubambi, Peter Apata

doi:10.1007/s00170-019-03400-2

Cited by 50 publications

(13 citation statements)

References 140 publications

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“…These defects could act as potential weakening sites when load is applied [29]. Literature has reported a significant decrease in properties of reinforced composites with excess addition of ceramic particles [30]. The reinforcement content must be kept at a critical level so as not to affect the mechanical properties negatively.…”

Section: Wear Response Of Saf 2205-tin Compositesmentioning

confidence: 99%

Effect of TiN Nanoparticles on the Friction and Wear Properties of Spark Plasma Sintered Fe-Cr-Ni

Mphahlele¹,

Oke²,

Ige³

et al. 2019

Tribol. Ind.

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This study evaluated the dry sliding wear and friction behaviour of spark plasma sintered Fe-Cr-Ni (a duplex stainless steel known as SAF 2205) matrix with titanium nitride (TiN) nanoparticles as reinforcement. Tests were performed with a tribometer at a relative humidity and temperature of 50 % and 25 °C respectively. Three loads were employed for all 600 cycles tests. Thereafter, the wear mode and mechanism were microscopically examined. Results showed that the coefficient of friction for the nanocomposites were higher than that of the unreinforced SAF 2205 despite showing improved wear performance. Samples with lower TiN compositions exhibited mixed mode of wear mechanism but at higher TiN content, the adhesive mechanism prevails. This study established that increasing the addition of nanosized TiN confers better wear behaviour on spark plasma sintered SAF 2205

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Section: Wear Response Of Saf 2205-tin Compositesmentioning

confidence: 99%

Effect of TiN Nanoparticles on the Friction and Wear Properties of Spark Plasma Sintered Fe-Cr-Ni

Mphahlele¹,

Oke²,

Ige³

et al. 2019

Tribol. Ind.

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“…This results from the microstructure's heterogeneous character, which induces the delocalization of the deformation due to the grain size gradient [26], thus delaying the plastic instability during uniaxial tensile tests, for example [17]. This tendency seems to be a characteristic common to heterogeneous microstructures [27][28][29][30]. Indeed, as revealed by the available literature, heterogeneous microstructures are known to induce better mechanical properties compromise, due to the presence of long-range stresses, themselves induced by the presence of geometrically necessary dislocations due to incompatibilities of deformation.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Spark Plasma Sintering-Processed Pure Ti and Ti-6Al-4V Alloys: A Comparative Study between Harmonic and Non-Harmonic Microstructures

et al. 2021

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Microstructure characteristics and compressive property relationships of so-called harmonic (composed by fine and coarse grains) and conventional pure titanium (Ti) and Ti-6Al-4V alloy processed by powder metallurgy route are presented in the present work. Electron backscatter diffraction (EBSD) analysis was performed to characterize the as-processed microstructures. The harmonicity structure of selected samples is described, and relevant EBSD maps are presented. The bulk samples’ hardness is reported, along with compressive responses at quasi-static and intermediate strain rates, ranging from 0.005 s−1 to 16 s−1. The strain rate sensitivity of these metallic samples is discussed, and the benefits in terms of mechanical properties of the harmonic microstructures compared with the non-harmonic conventional ones are highlighted. Finally, a modified Johnson–Cook model was shown to predict fairly the experimental results.

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“…Metal powders are increasingly used in powder metallurgy [ 1 ], 3D printing [ 2 ], laser cladding [ 3 ], and powder injection molding [ 4 ]. In order to obtain better products, it is necessary to use powders with better properties, including high sphericity, appropriate particle size distribution, and low impurity element contents.…”

Section: Introductionmentioning

confidence: 99%

Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization

Zhou

et al. 2021

Materials

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Gas atomization is a widely used method to produce the raw powder materials for additive manufacturing (AM) usage. After the metal alloy is melted to fusion, gas atomization involves two relatively independent processes: liquid breakup and droplet solidification. In this paper, the solidification behavior of powder during solidification is analyzed by testing the powder’s properties and observing microstructure of a martensitic stainless steel (FeCrNiBSiNb). The powder prepared by gas atomization has high sphericity and smooth surface, and the yield of qualified fine powder is 35%.The powder has typical rapid solidification structure. Collision between powders not only promotes nucleation, but also produces more satellite powder. The segregation of elements in powder is smaller as the result of high cooling rate which can reaches 4.2 × 105 K/s in average. Overall, the powder prepared by gas atomization is found to have good comprehensive properties, desired microstructure, and accurate chemical component, and it is suitable for various additive manufacturing techniques.

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Powder metallurgy of stainless steels and composites: a review of mechanical alloying and spark plasma sintering

Cited by 50 publications

References 140 publications

Effect of TiN Nanoparticles on the Friction and Wear Properties of Spark Plasma Sintered Fe-Cr-Ni

Effect of TiN Nanoparticles on the Friction and Wear Properties of Spark Plasma Sintered Fe-Cr-Ni

Mechanical Properties of Spark Plasma Sintering-Processed Pure Ti and Ti-6Al-4V Alloys: A Comparative Study between Harmonic and Non-Harmonic Microstructures

Performance Testing and Rapid Solidification Behavior of Stainless Steel Powders Prepared by Gas Atomization

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