Mechanical alloying behavior of Ti6Al4V residual scraps with addition of Al2O3 to produce nanostructured powder

Mahboubi, Amir; Karimzadeh, F.

doi:10.1016/j.matdes.2010.03.037

Cited by 23 publications

(7 citation statements)

References 27 publications

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“…Figure 1(b) indicates the major peak shift and dissolution of Al and V in Ti lattice due to longer milling time [25]. This result confirms the crystal evolution of HCP-Ti(Al) [22,26] and HCP-Ti (Al-V) supersaturated solid solution phases in MA after longer milling times. The atomic radius of Al (1.43 Å) and V (1.43 Å) was lower than Ti (1.47 Å) and hence, it was expected to dissolve the Al and V atoms in Ti lattice easily leading to produce the crystal structure of HCP-Ti(Al) and HCP-Ti (Al-V) phases; it was also expected due to the repeated cold welding, plastic deformation, and fracturing of powders leading to produce the grain refinement in the powders.…”

Section: Resultssupporting

confidence: 67%

“…Williamson-Hall (W-H) [21,22] method was used to investigate the various structural parameters (crystal size, lattice strain, dislocation density) using UDM, and USDM. As per the W-H-UDM method, the crystal size was evaluated using Equation (3):…”

Section: Methods Of Analysismentioning

confidence: 99%

“…Before XRD analysis, the instrumental broadening was deducted by the Equation (2). Williamson–Hall (W–H) [21,22] method was used to investigate the various structural parameters (crystal size, lattice strain, dislocation density) using UDM, and USDM. As per the W–H–UDM method, the crystal size was evaluated using Equation (3): From Equation (3), a graph was plotted by taking 4sinθ on X -axis and βcosθ on Y -axis.…”

Section: Methods Of Analysismentioning

confidence: 99%

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A novel study on mechanically alloyed nanocrystalline Ti-6Al-4V alloy fabricated by spark plasma sintering

et al. 2020

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The aim of this research work was to synthesize Ti-6Al-4V nanocrystalline alloy by mechanical alloying (MA) method with different milling times, and consolidate the powders by spark plasma sintering (SPS). The variation of structural parameters with the function of milling time was explored using several models based on x-ray diffraction (XRD) results. The XRD results revealed the formation of Ti(Al) and Ti(Al, V) coherent phases due to solid solution attainment eventually the crystalline size was decreased drastically from 90 nm (0 hr) to 4.4 nm (120 h) obtained from uniform stress deformation model (USDM). The powder surface morphology using HRSEM, physical properties ofsynthesised powders, and powder flow characteristics were investigated. The TEM and HRTEM analyses on the Ti-6Al-4V-120h sample was also examined. Mechanical behaviour and EBSD analyses of bulk samples were also explained and reported. The results of the Ti-6Al-4V-120h bulk sample after SPS exhibited high mechanical properties.

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Section: Resultssupporting

confidence: 67%

Section: Methods Of Analysismentioning

confidence: 99%

Section: Methods Of Analysismentioning

confidence: 99%

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A novel study on mechanically alloyed nanocrystalline Ti-6Al-4V alloy fabricated by spark plasma sintering

et al. 2020

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“…Application of titanium is limited because of some crucial factors such as poor wear resistance and relatively low hardness [3]. Incorporation of alloying elements, aluminium and vanadium to the titanium matrix improves the grain refinement and rust resistance [4]. Several researchers studied [2][3][4][5] and was concluded that, due to the incorporation of hard ceramic particles like B 4 C, TiB 2 , TiC, W, Al 2 O 3 into the metal matrix improved the wear resistance of the composites.…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Ramkumar¹,

Narayanasamy²,

Selvakumar³

et al. 2018

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The present investigation has been made to assess the influence of B 4 C reinforced with Ti-6Al-4V matrix prepared by powder metallurgy route. High energy ball milling was used to prepare the composites. Cylindrical preforms were prepared using suitable die set assembly. The green preforms were sintered in the muffle furnace at 900°C for 1 h. Further the preforms were cooled inside the furnace till the room temperature has attained. SEM with EDS mapping analysis was used to evaluate the morphology and elemental confirmation of the prepared composite. The density and hardness of the samples are determined using Archimedes principle and Rockwell hardness testing machine. The wear resistance of the samples was determined by employing a pin on disc apparatus. The hardness of the composites (Ti-6Al-4V /10B 4 C) was increased while comparing to the base material (Ti-6Al-4V) which is attributed to the presence of hard ceramic phase. Response Surface Methodology (RSM) five level central composite design approach was accustomed and it minimised the amount of experimental conditions and developed mathematical models among the key process parameters namely wt. % of B 4 C, applied load and sliding distances to forecast the abrasive response of Specific Wear Rate (SWR) and Coefficient of Friction (CoF). Analysis of variance was used to check the validity of the developed model. The optimum parameters of specific wear rate and coefficient of friction were identified.

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“…1,[2][3][4][5][6][7][8] Mechanical alloying (MA), which is usually used to prepare supersaturated solid solution and amorphous nanocrystalline materials, is the most frequently used method for preparing prealloyed ODS ferritic steel powder before densification. 9,[10][11][12] However, densification process such as hot extrusion or hot isostatic pressing is complicated; thus, new densification methods need to be introduced. Spark plasma sintering (SPS) has exhibited many features such as fast sintering, obtaining dense sintering product and low sintering temperature, which make it superior to other sintering methods.…”

Section: Introductionmentioning

confidence: 99%

Oxide dispersion strengthened ferritic steel fabricated by mechanical alloying and spark plasma sintering

et al. 2013

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The production process of a reduced activation oxide dispersion strengthened ferritic steel with nominal composition of Fe–12Cr–2·5W–0·2Ti–0·25Y2O3 (designated 12Cr-ODS) was investigated in this study. Master alloy with designed composition was prepared first, and the powder with two sizes obtained by atomising was prealloyed by mechanical alloying with added Y2O3 powder, followed by consolidated spark plasma sintering. Characteristics of the samples were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and relative density, and the mechanical properties such as hardness (HV), bending strength and tensile strength were also tested. Sample with 50% coarse particles and 50% fine particles was found to be of better comprehensive properties. Mechanical properties of the sample changed with the improved microstructure of refining grains and optimised oxide particles that were acquired through annealing. However, further research on the dispersion and properties of oxide particles is needed in the future.

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Mechanical alloying behavior of Ti6Al4V residual scraps with addition of Al2O3 to produce nanostructured powder

Cited by 23 publications

References 27 publications

A novel study on mechanically alloyed nanocrystalline Ti-6Al-4V alloy fabricated by spark plasma sintering

A novel study on mechanically alloyed nanocrystalline Ti-6Al-4V alloy fabricated by spark plasma sintering

Archives of Metallurgy and Materials

Oxide dispersion strengthened ferritic steel fabricated by mechanical alloying and spark plasma sintering

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