Analysis of biomedical titanium implant green parts by X-Ray tomography

Urtekin, Levent; Bozkurt, Fatih; Çanlı, Murat

doi:10.1016/j.jmrt.2021.06.083

Cited by 7 publications

(2 citation statements)

References 35 publications

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“…Titanium is considered to be the most biocompatible of the metals due to its resistance to corrosion in body fluids and bio-inertness [ 10 , 45 , 46 ]. The strength of titanium is due to a protective oxide film that forms naturally in the presence of oxygen found in body fluids [ 47 ].…”

Section: Incremental Sheet Forming Towards Biomedical Applicationsmentioning

confidence: 99%

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

et al. 2021

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Incremental sheet forming of titanium and its alloys has a significant role in modern manufacturing techniques because it allows for the production of high-quality products with complex shapes at low production costs. Stamping processes are a major contributor to plastic working techniques in industries such as automotive, aerospace and medicine. This article reviews the development of the single-point incremental forming (SPIF) technique in titanium and its alloys. Problems of a tribological and microstructural nature that make it difficult to obtain components with the desired geometric and shape accuracy are discussed. Great emphasis is placed on current trends in SPIF of difficult-to-form α-, α + β- and β-type titanium alloys. Potential uses of SPIF for forming products in various industries are also indicated, with a particular focus on medical applications. The conclusions of the review provide a structured guideline for scientists and practitioners working on incremental forming of titanium and titanium alloy sheets. One of the ways to increase the formability and minimize the springback of titanium alloys is to treat them at elevated temperatures. The main approaches developed for introducing temperature into a workpiece are friction heating, electrical heating and laser heating. The selection of an appropriate lubricant is a key aspect of the forming process of titanium and its alloys, which exhibit unfavorable tribological properties such as high adhesion and a tendency to adhesive wear. A review of the literature showed that there are insufficient investigations into the synergistic effect of rotational speed and tool rotation direction on the surface roughness of workpieces.

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Section: Incremental Sheet Forming Towards Biomedical Applicationsmentioning

confidence: 99%

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

et al. 2021

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“…23 Their study focused on density measurements and dimensional changes and found that the binder removal process produced substantial dimensional changes in the green bodies. A variety of other studies were conducted to examine the structure of green bodies, which were comprised by both ceramic [24][25][26][27] and metal [28][29][30] powders, using X-ray CT. Donzel et al have used neutron imaging to study TBR removal. 31 The emphasis of that study was on the binder distribution in traditionally processed green bodies and not 3D-printed specimens by stereolithography.…”

Section: Introductionmentioning

confidence: 99%

Binder removal from ceramic stereolithography green bodies: A neutron imaging and thermal analysis study

et al. 2023

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Stereolithography of ceramics remains one of the most powerful additive manufacturing routes for the creation of intricate ceramic parts. Despite its utility as a forming tool, ceramic stereolithography requires a challenging debinding stage due to the requisite high polymeric loading. Earlier research has identified both the polymeric resin composition and debinding atmosphere to be crucial factors in improving debinding performance. Here, we use a combination of thermogravimetric analysis and neutron imaging to examine samples of different compositions printed using the same processing and exposure parameters. We quantify the influence of both polyethylene glycol addition and the use of different debinding atmospheres (argon and vacuum) on the debinding behavior of ceramic pellets. Specifically, we demonstrate a method for examining the concentration gradients that develop during thermal debinding with the aid of neutron tomography. We find that at a constant heating rate of 1°C/min up to 500°C, vacuum atmosphere appears to result in a greater number of cracks as compared to the use of argon. The vacuum atmosphere led to the development of lower concentration gradients in the samples on average. The greatest improvement resulted with the addition of polyethylene glycol to the samples. This addition led to significantly less cracking and much lower concentration gradients in samples during debinding. These results prompt us to conclude that while keeping printing and exposure parameters constant, composition modification has a more significant effect on the debinding improvement than heating atmosphere.

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Recent progress of novel biodegradable zinc alloys: from the perspective of strengthening and toughening

Zhuo

et al. 2022

Journal of Materials Research and Technology

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Analysis of biomedical titanium implant green parts by X-Ray tomography

Cited by 7 publications

References 35 publications

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

Single-Point Incremental Forming of Titanium and Titanium Alloy Sheets

Binder removal from ceramic stereolithography green bodies: A neutron imaging and thermal analysis study

Recent progress of novel biodegradable zinc alloys: from the perspective of strengthening and toughening

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