Development of new Co–Cr–W-based biomedical alloys: Effects of microalloying and thermomechanical processing on microstructures and mechanical properties

Yamanaka, Kazushi; Mori, M.; Kuramoto, Kei; Chiba, Akihiko

doi:10.1016/j.matdes.2013.10.052

Cited by 78 publications

(44 citation statements)

References 39 publications

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“…Our previous studies [9,19] showed that solid-solution strengthening of carbon was negligible, as theoretically predicted; therefore, the precipitates would have 1 The casting and hot-rolling conditions are the same as those described in the previous sections. [11,12] dominated the strengthening of the present alloys.…”

Section: Effect Of Carbon Concentration On Tensilementioning

confidence: 79%

“…We have recently proposed a strategy for designing a new class of Ni-free Co-Cr-W-based alloys with excellent mechanical properties [9][10][11][12][13][14]. By employing thermodynamic calculations, we examined the alloying elements, namely, Si and C, to modify and further strengthen the commercial Co-28Cr-9W (mass%) alloy [9].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…By employing thermodynamic calculations, we examined the alloying elements, namely, Si and C, to modify and further strengthen the commercial Co-28Cr-9W (mass%) alloy [9]. In particular, this review reports the effects of carbon on the relationship between the microstructures and mechanical properties of Ni-free Co-Cr-Wbased alloys [9][10][11][12]. In addition to systematically investigating the carbonconcentration-dependence of the phase distributions, precipitates, and tensile properties of the alloys, we carried out a preliminary evaluation of the effects of thermomechanical processing to further improve the alloys' mechanical performance.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Carbon Addition on Mechanical Properties and Microstructures of Ni-Free Co–Cr–W-Based Dental Alloys

Yamanaka

Mori

Chiba

2015

Interface Oral Health Science 2014

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We investigated the effects of carbon concentration on the microstructures and tensile properties of Ni-free Co-29Cr-9W-1Si-C (mass%) alloys used as disk materials in dental technology based on computer-aided design and computeraided manufacturing (CAD/CAM). The alloy specimens, which contained carbon in different concentrations, were prepared by conventional casting. The precipitates changed from intermetallic compounds in the low-carbon alloys, e.g., the σ and Laves phases, to M 23 C 6 -type carbide (M: metal) with increasing bulk carbon concentration. M 23 C 6 dramatically enhanced the 0.2 % proof stress, which then gradually increased with increasing carbon content in the alloys. The elongation-tofailure also increased with increasing carbon content. The coarse M 23 C 6 particles formed by higher concentrations of carbon were detrimental to ductility, however, and a maximum elongation-to-failure was obtained at a carbon concentration of 0.1 mass%. In addition, we applied hot-deformation processing to the cast-alloy specimens and revealed that compared to as-cast alloys, the hot-rolled alloys with added carbon showed an excellent combination of high strength and high ductility. The current study can thus aid in the design of biomedical, carbon-containing, Co-28Cr-9W-1Si-based alloys.

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Section: Effect Of Carbon Concentration On Tensilementioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Carbon Addition on Mechanical Properties and Microstructures of Ni-Free Co–Cr–W-Based Dental Alloys

Yamanaka

Mori

Chiba

2015

Interface Oral Health Science 2014

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“…Si is widely used as an alloying element to enhance the corrosion resistance of steels and alloys in various conditions. In addition Si adding to CoCrW could retard the precipitation of the brittle σ phase [8]. However, no research related to the effect of Si on corrosion resistance of CoCrMo alloys has been carried out.…”

Section: Introductionmentioning

confidence: 99%

Effect of Si on Microstructure and Corrosion Behavior of CoCrMo Alloys

Peaubuapuan

Tunthawiroon

Kanlayasiri

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract:The aim of this research was to investigate the effect of silicon (Si) on the microstructure and corrosion behavior of CoCrMo alloys. The concentration of Si added in CoCrMo alloys was 0.1, 0.5 and 1 wt %. The corrosion behavior of the present alloys was investigated using potentiodynamic polarization measurements. The normal saline solution with 0.9 wt % was used as an electrolyte. Polarization curves obtained from the polarization test were used to evaluate in terms of corrosion current density (i corr ), corrosion potential (E corr ) and corrosion parameters that be used to compute corrosion resistant property of CoCrMo alloys. The microstructure of a sample during the polarization test was compared using X-ray diffraction (XRD) and optical microscope (OM). The results indicated that the increase in Si slightly changed the microstructure of CoCrMo alloys and could enhance the resistance to corrosion of CoCrMo alloys in NaCl solution. In addition, the reduction of Cr and Mo concentration in CoCrMo alloys was found to be a significant influence on the decrease in corrosion resistance.

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Strain-Induced Martensitic Transformation in a Co-Cr-W-Mo Alloy Probed by Nanoindentation

Weißensteiner

Voigt

Clemens

et al. 2018

The Minerals, Metals &Amp; Materials Series

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Development of new Co–Cr–W-based biomedical alloys: Effects of microalloying and thermomechanical processing on microstructures and mechanical properties

Cited by 78 publications

References 39 publications

Effects of Carbon Addition on Mechanical Properties and Microstructures of Ni-Free Co–Cr–W-Based Dental Alloys

Effects of Carbon Addition on Mechanical Properties and Microstructures of Ni-Free Co–Cr–W-Based Dental Alloys

Effect of Si on Microstructure and Corrosion Behavior of CoCrMo Alloys

Strain-Induced Martensitic Transformation in a Co-Cr-W-Mo Alloy Probed by Nanoindentation

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