Microscopic and Mechanical Characterization of Co-Cr Dental Alloys Joined by the TIG Welding Process

Carek, Andreja; Benić, Ljerka Slokar; Bubalo, Vatroslav; Kosović, Nika

doi:10.3390/ma16103890

Cited by 2 publications

(1 citation statement)

References 41 publications

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“…When testing the flexural strength, a greater force was applied to the VI-COMP, Wirobond C and I-BOND NF specimens for the same deflection. The forces for the laser welded I-MG and Brealloy F 400 were lower compared to TIG welded specimens in [44]. The highest stress was calculated for the I-BOND NF laser joint because the directional joining and the overlap of the weld spots were optimally executed.…”

Section: Discussionmentioning

confidence: 89%

Investigation of Laser-Welded Co-Cr Dental Alloys by Microscopy and Mechanical Testing

Carek

Benić

Buković

et al. 2023

Metals

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In order to improve the hold and function of dentures for the patient, various prostheses made of metal, mostly metal alloys, are used every day in dental practise. Cobalt-chromium alloys are usually the first choice because they have very good mechanical properties and satisfactory clinical conditions. Nowadays, laser welding is increasingly used in dental practise due to its numerous advantages over other technologies. In this work, therefore, six commercially available Co-Cr alloys were investigated. Three of them are used for metal-ceramic work, two for denture frameworks and one is suitable for both applications. They were joined by laser welding and subsequently analysed microscopically. Their mechanical properties were determined and statistically evaluated. The microhardness of the laser-welded alloys is in the range of 282–465 MPa in the weld zone and between 283 and 435 MPa in the heat-affected zone. The flexural strength of the laser-welded alloys is lower than the control group, but an alloy for the metal-ceramic work (I-BOND NF) shows very similar value. Furthermore, this alloy, together with two other metal-ceramic alloys, survived a maximum of cycles in dynamic tests. It was found that the laser method can be used for joining Co-Cr alloys while ensuring appropriate parameters that guarantee the quality of the dental work.

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Section: Discussionmentioning

confidence: 89%

Investigation of Laser-Welded Co-Cr Dental Alloys by Microscopy and Mechanical Testing

Carek

Benić

Buković

et al. 2023

Metals

Self Cite

View full text Add to dashboard Cite

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CHARACTERIZATION OF SURFACE, SUBSURFACE DAMAGE AND THEIR EFFECT ON FATIGUE LIFE AFTER MACHINING OF AEROSPACE-GRADE ALUMINUM ALLOY (Al 6082-T6)

ZIA,

MUGHAL,

ALI

et al. 2024

Surf. Rev. Lett.

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Aluminum alloys are widely used in the automotive and aerospace industries due to their lower mass-to-strength ratio than other metallic alloys. Apart from their inherent properties, aluminum alloys like other metallic alloys show a significant change in their mechanical properties according to the machining parameters. The research literature on obtaining optimum mechanical properties of aluminum alloys that undergo machining is very limited. Moreover, the combined effect of several parameters on the machinability of aluminum alloys has not yet been explored. In this paper, the effect of three machining parameters (Depth of Cut (DoC)), feed rate (FR), and cutting speed (CS) on the subsurface damage and fatigue life of aerospace-grade aluminum alloy (Al-6082-T6) is observed. Samples are prepared using a full fractional approach to effectively capture the effect of all input parameters. Thereafter, samples were subjected to surface roughness, micro-hardness, and fatigue life tests. Results of surface roughness and micro-hardness tests are compared with fatigue life. The general linear model was employed to capture the percentage effect of each input parameter on the output parameters. The results showed that DoC was the main contributing factor that caused subsurface damage, while surface roughness and fatigue life were mainly affected by FR and CS. Optical microscope images showed a white layer formation that had higher hardness than the base metal. Overall, this research work proposes the input parameters that can be used to achieve minimum surface damage and fatigue life.

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Microscopic and Mechanical Characterization of Co-Cr Dental Alloys Joined by the TIG Welding Process

Cited by 2 publications

References 41 publications

Investigation of Laser-Welded Co-Cr Dental Alloys by Microscopy and Mechanical Testing

Investigation of Laser-Welded Co-Cr Dental Alloys by Microscopy and Mechanical Testing

CHARACTERIZATION OF SURFACE, SUBSURFACE DAMAGE AND THEIR EFFECT ON FATIGUE LIFE AFTER MACHINING OF AEROSPACE-GRADE ALUMINUM ALLOY (Al 6082-T6)

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