Microstructure change under hot deformation in zirconium alloys synthesized by powder metallurgy

Dekhtyar, A. I.; Bondarchuk, V. I.; Karasevska, О. P.; Oryshych, D. V.; Savvakin, Dmytro G.; Skoryk, M. A.

doi:10.1016/j.matchar.2019.109949

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…The profiling of the interior of the green part will be performed using XCT. This method is deemed superior to other methods, such as dimensional measurements and the hydrostatic Archimedean technique, which require a large amount of work and can be tedious [ 30 ]. Other traditional techniques required a process of sample cutting, mounting, and polishing, which are therefore destructive.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Green Part of Steel from Metal Injection Molding: An Analysis Using Moldflow

et al. 2023

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Metal injection molding (MIM) is a quick manufacturing method that produces elaborate and complex items accurately and repeatably. The success of MIM is highly impacted by green part characteristics. This work characterized the green part of steel produced using MIM from feedstock with a powder/binder ratio of 93:7. Several parameters were used, such as dual gates position, injection temperature of ~150 °C, and injection pressure of ~180 MPa. Analysis using Moldflow revealed that the aformentioned parameters were expected to produce a green part with decent value of confidence to fill. However, particular regions exhibited high pressure drop and low-quality prediction, which may lead to the formation of defects. Scanning electron microscopy, as well as three-dimensional examination using X-ray computed tomography, revealed that only small amounts of pores were formed, and critical defects such as crack, surface wrinkle, and binder separation were absent. Hardness analysis revealed that the green part exhibited decent homogeneity. Therefore, the observed results could be useful to establish guidelines for MIM of steel in order to obtain a high quality green part.

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Section: Resultsmentioning

confidence: 99%

Characterization of Green Part of Steel from Metal Injection Molding: An Analysis Using Moldflow

et al. 2023

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“…Using hydrogenated zirconium powder is recommended when making zirconium-based alloys. When metals are ground into powders and then heated further, hydrogen is released from the metal, which leads to a relatively high density of defects, including dislocations [47].…”

Section: Zirconium Alloymentioning

confidence: 99%

A critical review on biomaterials using powder metallurgy method

Abraham,

Venkatesan

2024

Eng. Res. Express

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Implants play a vital role in a person's life because losing any body part to function less actively, which makes the sufferer uncomfortable. Implants should be both biocompatible and non-toxic to the body is essential to achieve its biocompatibility nature. To create orthopaedic, dental, and surgical implants, biomaterials were divided into three categories: metallic, polymeric, and ceramic. Materials based on polymers indicate their degree of adaptability in terms of sutures, medication delivery, etc. Ceramic materials are known for their high compressive strength and inert behaviour, which combine aesthetic qualities. Metallic biomaterials are enhanced by their high strength and resistance to fracture. One of the most promising techniques for improving a material's mechanical qualities is powder metallurgy. Powder metallurgy involves blending of powders, compaction of blended powder, sintering and mechanical test. Samples with varying compact pressures, sintering temperatures, and sintering times were created using the powder metallurgy process. The aim of the research work is to get the concept of powder metallurgy, biomaterials commercially available for orthopaedic and dental applications, properties of biomaterial and methods to fabricate the material effectively.

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“…In comparison, hot-pressing sintering is a more flexible preparation method for alloys and composites, with good formability and applicability [ 22 ]. Hot-pressing sintering has been successfully applied to the preparation of a variety of alloys and composites, such as, Nickel-based superalloy [ 23 , 24 ], AA6082-ZTA composites [ 25 ], Ti-Zr alloys [ 26 ], Al-Ti-Zr alloys [ 27 ], Ti35Zr28Nb [ 28 ], SiC/Al-Zn-Mg-Cu [ 29 ], (Ti,Zr)B2-(Zr,Ti)C [ 30 ], Zr-1.2Sn1Nb-0.4Fe, and Zr-1.2Bi-1Nb-0.4Fe [ 31 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Thermal Deformation Behavior of Hot-Pressing Sintered Zr-6Al-0.1B Alloy

et al. 2022

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Zr-6Al-0.1B alloy rich in Zr3Al phase is prepared by hot-pressing sintering. The thermal deformation behavior of sintered Zr-6Al-0.1B is analyzed by isothermal compression tests at deformation temperatures of 950, 1050, and 1150 °C with strain rates of 0.01, 0.1, and 1 s−1. The results indicate that at the early stage of thermal deformation, the stress increases rapidly with the increase of strain and then reaches the peak value. Subsequently, the stress decreases with the increase of strain under the softening effect. On the whole, the true stress-strain curve shifts to the high stress area with the increase of strain rate or the decrease of deformation temperature, so the sintered Zr-6Al-0.1B alloy belongs to the temperature and strain rate sensitive material. For the microstructure evolution of sintered Zr-6Al-0.1B during the isothermal compression, the high strain rate can improve the grain refinement. However, because sintered Zr-6Al-0.1B is a low plastic material, too high strain rate will exceed the deformation capacity of the material, resulting in an increase in defects. The increase of deformation temperature also contributes to grain refinement, but when the temperature is too high, due to the decomposition of Zr3Al phase, the deformation coordination of the material decreases, leading to the increase of the probability of the occurrence of defects. This study verified the feasibility of hot-pressing sintering to prepare Zr-6Al-0.1B alloy rich in Zr3Al phase and laid the foundation of “hot-pressing sintering + canning hot-extrusion” process of Zr-6Al-0.1B alloy components.

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Microstructure change under hot deformation in zirconium alloys synthesized by powder metallurgy

Cited by 7 publications

References 13 publications

Characterization of Green Part of Steel from Metal Injection Molding: An Analysis Using Moldflow

Characterization of Green Part of Steel from Metal Injection Molding: An Analysis Using Moldflow

A critical review on biomaterials using powder metallurgy method

Microstructure and Thermal Deformation Behavior of Hot-Pressing Sintered Zr-6Al-0.1B Alloy

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