Effect of the heat treatment on corrosion and mechanical properties of CoCrMo alloys manufactured by selective laser melting

Zhang, Mingkang; Yang, Yongqiang; Song, Changhui; Bai, Yuchao; Zhang, Xiao

doi:10.1108/rpj-10-2017-0215

Cited by 21 publications

(9 citation statements)

References 28 publications

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“…The ultimate strength of the CoCr alloy formed by SLM is 1,282.7 6 10.1 MPa, the yield strength is 847.3 6 10.8 MPa and the elongation is 10.9 6 0.5%. These values are close to the data in other references (Lee et al, 2019;Béreš et al, 2018;Zhang et al, 2018a). Moreover, the ultimate strength of the CoCr alloy formed by SLM reached 1,395.3 6 53.0 MPa after the porcelain sintering treatment, the yield strength was 1,011.3 6 30.4 MPa and the elongation was 5.0 6 0.9%.…”

Section: Tensile Propertiessupporting

confidence: 89%

“…In addition, the fast scanning speed of the laser causes the powder to solidify very quickly after melting, so the sample formed by the SLM retains the g phase present at high temperatures. As described by Zhang et al, the g phase exists at high temperature, and « phase is the stable phase at normal temperature (Zhang et al, 2018a). However, after the sample was treated by porcelain sintering process, the g phase of the SLM-formed CoCr alloy sample was further converted into the « phase, and the « phase increased with the new peak corresponding to the 1010 plane.…”

Section: X-ray Diffractionmentioning

confidence: 86%

“…The mechanical properties of CoCr alloy prepared by SLM were continuously improved, and the anisotropy of microstructure and mechanical properties of CoCr alloys fabricated by SLM were also studied (Lee et al, 2019;Limmahakhun et al, 2017). In addition, there are many reports on the heat treatment behavior of CoCr alloys formed by SLM technology (Zhang et al, 2018b;Zhang et al, 2018a).…”

Section: Introductionmentioning

confidence: 99%

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Selective laser melting dental CoCr alloy: microstructure, mechanical properties and corrosion resistance

Chen

Yang

et al. 2021

RPJ

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Purpose In this paper, the mechanical properties and corrosion resistance of CoCr alloy fabricated by selective laser melting (SLM) were studied, and the changes of performance after porcelain sintering process were also analysed. This study is to point out the relationship between the microstructure, mechanical properties and corrosion resistance of CoCr alloys prepared by SLM after porcelain sintering process. In addition, the biosafety of the sintered CoCr alloy was evaluated. Design/methodology/approach The microscopic feature changes of CoCr alloy samples after porcelain sintering process were observed by DMI 5000 M inverted metallographic microscope and Nova Nano430 FE-SEM. Moreover, phase identification and determination were conducted by X-ray diffraction (XRD) using Smartlab X-ray diffractometer. The Vickers microhardness was measured on the HVS-30 microhardness tester, and tensile tests were carried out on a CM3505 electronic universal testing machine. The corrosion resistance was tested by a classical three-point electrode system electrochemical method, then the ion precipitation was measured by using an atomic absorption spectrometer of Z2000 7JQ8024. Findings The XRD results indicate that the transition of γ phase (FCC) to e phase (HCP) occurs during the porcelain sintering processing of CoCr alloy. Moreover, the Vickers microhardness of the upper surface and the side surface of the CoCr alloy sample was improved by more than 36%. In addition, the ultimate strength of CoCr alloy via porcelain sintering treatment was increase to 1,395.3 ± 53.0 MPa compared to 1,282.7 ± 10.1 MPa of unprocessed CoCr alloy. However, the corrosion resistance of CoCr alloy samples decreases after porcelain sintering process. Originality/value There are few studies on the relationship of microstructure, mechanical properties and corrosion resistance of CoCr alloys prepared by SLM after porcelain sintering process. In this study, the microstructure, mechanical properties and corrosion resistance of CoCr alloy after porcelain sintering process were studied, and the biosafety of the alloy was evaluated. The research found that it is feasible to apply CoCr alloy fabricated by SLM to dental medicine after porcelain sintering process.

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Section: Tensile Propertiessupporting

confidence: 89%

Section: X-ray Diffractionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Selective laser melting dental CoCr alloy: microstructure, mechanical properties and corrosion resistance

Chen

Yang

et al. 2021

RPJ

Self Cite

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“…A personalized femoral component of CoCrMo (CCM) with good exterior quality, mechanical property and biological corrosion resistance, obtained by the SLM process, was the achievement of the work proposed by Song (2016). Zhang (2018b) offered a comparison between SLM-produced CoCrMo alloys and the ones manufactured by casting under the ASTM F75 standard. The investigation focused on the heat treatment influence on the corrosion resistance, adhesion of streptococcus mutants and mechanical properties of the previously mentioned alloy.…”

Section: Aluminum-based Alloysmentioning

confidence: 99%

Selective laser melting: lessons from medical devices industry and other applications

Fé-Perdomo

Ramos‐Grez

Beruvides³

et al. 2021

RPJ

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Purpose The purpose of this paper is to outline some key aspects such as material systems used, phenomenological and statistical process modeling, techniques applied to monitor the process and optimization approaches reported. All these need to be taken into account for the ongoing development of the SLM technique, particularly in health care applications. The outcomes from this review allow not only to summarize the main features of the process but also to collect a considerable amount of investigation effort so far achieved by the researcher community. Design/methodology/approach This paper reviews four significant areas of the selective laser melting (SLM) process of metallic systems within the scope of medical devices as follows: established and novel materials used, process modeling, process tracking and quality evaluation, and finally, the attempts for optimizing some process features such as surface roughness, porosity and mechanical properties. All the consulted literature has been highly detailed and discussed to understand the current and existing research gaps. Findings With this review, there is a prevailing need for further investigation on copper alloys, particularly when conformal cooling, antibacterial and antiviral properties are sought after. Moreover, artificial intelligence techniques for modeling and optimizing the SLM process parameters are still at a poor application level in this field. Furthermore, plenty of research work needs to be done to improve the existent online monitoring techniques. Research limitations/implications This review is limited only to the materials, models, monitoring methods, and optimization approaches reported on the SLM process for metallic systems, particularly those found in the health care arena. Practical implications SLM is a widely used metal additive manufacturing process due to the possibility of elaborating complex and customized tridimensional parts or components. It is corroborated that SLM produces minimal amounts of waste and enables optimal designs that allow considerable environmental advantages and promotes sustainability. Social implications The key perspectives about the applications of novel materials in the field of medicine are proposed. Originality/value The investigations about SLM contain an increasing amount of knowledge, motivated by the growing interest of the scientific community in this relatively young manufacturing process. This study can be seen as a compilation of relevant researches and findings in the field of the metal printing process.

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“…Soran and Mutlu have studied on production and anodizing of highly porous Ti-Ta-Zr-Co alloy for biomedical implant applications [9]. Effect of the heat treatment on corrosion and mechanical properties of CoCrMo alloys manufactured by selective laser melting has been investigated by Zhang et al [10]. Yuan et al [11] have studied on performance comparison between metal materials for fashion jewelry.…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of Ni–Cr alloy in artificial tears in the presence of excess of glucose and sodium chloride

2019

Int. J. Corros. Scale Inhib.

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During surgical operations in the eye, metallic materials may come in contact with tears. These metals/alloys may undergo corrosion when they contact the tears. The corrosion resistance of a Ni-Cr alloy in artificial tears in the presence of excess of glucose and sodium chloride has been evaluated by electrochemical studies such as polarization study and AC impedance spectroscopy. It is observed that when the sodium chloride level or glucose level in tears increases, the corrosion resistance of Ni-Cr alloy in artificial tears is not affected. It is interesting to note that the corrosion resistance of Ni-Cr alloy in artificial tears rather increases. Hence when there is an increase in glucose level of sodium chloride level in tears, the surgical instruments may be of Ni-Cr alloy.

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Effect of the heat treatment on corrosion and mechanical properties of CoCrMo alloys manufactured by selective laser melting

Cited by 21 publications

References 28 publications

Selective laser melting dental CoCr alloy: microstructure, mechanical properties and corrosion resistance

Selective laser melting dental CoCr alloy: microstructure, mechanical properties and corrosion resistance

Selective laser melting: lessons from medical devices industry and other applications

Corrosion resistance of Ni–Cr alloy in artificial tears in the presence of excess of glucose and sodium chloride

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