Study of 2D and 3D Methods for Worn Surface Analysis of Tool Materials

Hatos, István; Hargitai, Hajnalka; Solecki, Levente

doi:10.14513/actatechjaur.v8.n2.373

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…The null hypothesis is rejected, and there are some surface changes following the screwing-unscrewing of healing abutment on the implant hex surface and screw head. Various methods to measure the surface wear are the 2D surface profilometry [ 29 , 30 ], SEM [ 31 , 32 ], 3D images superimposition using computer software [ 33 , 34 ], wear volume calculation using 3D images from focus variation microscopy [ 30 ] and wear particle characterization [ 35 ]. Stress distribution analysis can be performed from the finite element (FE) study [ 36 ].…”

Section: Discussionmentioning

confidence: 99%

Healing Abutment Distortion in Implant Prostheses: An In Vitro Study

Pandey

Bhattarai

Riddhabhaya

et al. 2022

JFB

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Little has been studied regarding the repeated usage of healing abutments and their effects on the distortion of dental implant-healing abutment hex surfaces. Additionally, implant manufacturers do not provide specific guidelines on how many times a healing abutment can be used before discarding. Therefore, we evaluated the effect of repeated screwing-unscrewing of implant-healing abutment on the healing abutment hex surface and screw head. A total of 12 Biomate implants with 4 mm diameter and 13 mm length were inserted into a synthetic bone block. The standard healing abutments of 3 mm diameter and 4 mm length were screwed onto each implant using a torque ratchet at a final torque of 30 Ncm. Immediately, the abutments were unscrewed at 30 Ncm. Then, screwing-unscrewing was repeated for 4, 8, 16, 24, 32, 40, 80, 160, 320, and 400 times and the healing abutments were scanned under the scanning electron microscope for any distortion. Distortion was graded as 0, 1, 2, and 3. Data were analyzed using SPSS 24.0. Descriptive statistics were calculated. One-way ANOVA with post hoc using Tukey’s HSD test was performed to analyze the difference in distortion at different screwing-unscrewing times. A significant level was selected at p-value = 0.05. It was found that distortion healing abutments screws were seen after 32 times screwing and unscrewing. There was a significant difference in the distortion (p-value < 0.05) after 24 times of repeated usage of healing abutment and at 160, 320, and 400 times. No surface distortions were observed at the healing abutment screw head at 4, 8, 16, 24, 32, 40, 80, 160, 320, and 400 cycles of screwing-unscrewing. It can be concluded that repeated screwing and unscrewing of the implant-healing abutments causes damage to the healing abutment hex surface. The distortion of healing abutments screws was seen after 32 times screwing and unscrewing. No surface distortions were observed on the healing abutment screw head until 400 times of screwing and unscrewing. Hence, the clinician should be cautious while using the healing abutments repeatedly.

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Section: Discussionmentioning

confidence: 99%

Healing Abutment Distortion in Implant Prostheses: An In Vitro Study

Pandey

Bhattarai

Riddhabhaya

et al. 2022

JFB

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“…Due to its high strength and hardness, the alloy is perfectly suitable for building elements of injection moulds [5], [6]. Thanks to the layer manufacturing by the method of Laser CUSING, it is possible to build forming inserts with cooling channels matching the shape of the part being formed, i.e.…”

Section: Methodology Of Investigationmentioning

confidence: 99%

Investigations of Surface Topography of Hot Working Tool Steel Manufactured with the Use of 3D Print

2017

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Abstract. The paper presents the possibilities of 3D printing of chosen hot working tool steel for manufacturing ready made parts. Results of examination of the surface topography of material manufactured by the technology Laser CUSING®B (Laser melting with metals) on the machine, Concept Laser M1 3D printing of metal parts has the potential to revolutionize the market of manufacturing and supplying parts. It makes it possible to dissipate manufacturing and to produce parts on request at lower cost and less energy consumption. The parameters of the surface topography of the hot working tool steel directly after printing can differ depending on the distance from the base plate. The differences of surface roughness values can amount from 32% to 85% for Ra and from 59% to 85% for Rz in comparison of the sample bottom to its top.

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“…Also, rapid material loss leads to frequent replacement of worn parts which is uneconomical. Worn surface analysis can be carried out by many methods including two-dimensional (2D) and three-dimensional (3D) methods [47][48][49][50][51][52][53] (see supplementary information for details). Specific wear rate (mm 3 /N-m) is an indicator of the severity of wear that material has gone through.…”

Section: Mechanical and Tribological Studymentioning

confidence: 99%

Dry sliding wear behavior of hard-chrome and zinc-phosphate conversion coatings on steel substrates

Kumar,

Rachwani,

Kumar Singh

2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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We have studied tribological properties of conversion coatings, hard chrome on AISI 430 stainless steel, and zinc phosphate on AISI 1044 carbon steel. These substrates were chosen due to their extensive industrial applications. The goal of the present study is to improve the wear resistance of these substrates through the coatings. We performed nano-indentation and ball-on-disc tribometer experiments to study mechanical and tribological behavior of substrates and coatings. We find that when zinc-phosphate coating is applied to AISI 1044 steel, a new phase Zn2Fe(PO4)2·4H2O (phosphophyllite) is formed on the surface that increases the surface hardness. We further find that coefficient of friction decreases approximately by 8% due to hard-chrome coating on AISI 430 steel and by 48% due to zinc-phosphate coating on AISI 1044 steel under load and speed conditions applied in the present study. We attribute our findings to formation of: (1) an adhering layer of chromium in the case of chrome–steel contact, leading to chrome–chrome contact at the interface of test-specimen and counter-surface, and (2) a glossy layer at interface in the case of phosphate-steel contact, owing to the compaction and crushing of phosphate wear debris. Our wear studies show maximum reductions in specific wear rate to be around 80% and 89% for chrome and zinc-phosphate coatings, respectively. We note that adhesion and abrasion are the primary modes of wear for chrome and zinc-phosphate conversion coatings, respectively at the initial stage. However, adhesive wear switches to delamination wear at a later stage for hard-chrome coating.

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Study of 2D and 3D Methods for Worn Surface Analysis of Tool Materials

Cited by 4 publications

References 16 publications

Healing Abutment Distortion in Implant Prostheses: An In Vitro Study

Healing Abutment Distortion in Implant Prostheses: An In Vitro Study

Investigations of Surface Topography of Hot Working Tool Steel Manufactured with the Use of 3D Print

Dry sliding wear behavior of hard-chrome and zinc-phosphate conversion coatings on steel substrates

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