Microstructure and tensile properties of metal injection molding Co–29Cr–6Mo–0.23C alloy

Muterlle, Palloma Vieira; Zendron, M.; Perina, M.; Bardini, R.; Molinari, A.

doi:10.1007/s10853-009-4051-1

Cited by 24 publications

(8 citation statements)

References 14 publications

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“…FOR and CAS specimens were provided by SAMO SpA (Granarolo Emilia, Bologna, Italy) while MIM specimens, produced according to the process described in Refs. , were provided by Mimest (Pergine Valsugana, Trento, Italy).…”

Section: Methodsmentioning

confidence: 99%

“…Several works in the last years have dealt with the optimization of the process from the microstructural and mechanical point of view. The effects of alloy composition, sintering temperature, thermal treatment and hot isostatic pressing have been evaluated, comparing hardness, wear behavior and tensile properties: properties of the MIM alloys have been then adjusted to the standard requirements (ISO 5234‐4; ASTM F75). The acceptance of these components is subjected to a strict regulation (ASTM F2083/ISO 21536), which requires same properties and behavior of the commercialized components at least from the biocompatibility, fatigue, and electrochemical point of view.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Metal injection molding as enabling technology for the production of metal prosthesis components: Electrochemical andin vitrocharacterization

Melli

Rondelli

Sandrini³

et al. 2013

J. Biomed. Mater. Res

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Industrial manufacturing of prosthesis components could take significant advantage by the introduction of new, cost-effective manufacturing technologies with near net-shape capabilities, which have been developed during the last years to fulfill the needs of different technological sectors. Among them, metal injection molding (MIM) appears particularly promising for the production of orthopedic arthroplasty components with significant cost saving. These new manufacturing technologies, which have been developed, however, strongly affect the chemicophysical structure of processed materials and their resulting properties. In order to investigate this relationship, here we evaluated the effects on electrochemical properties, ion release, and in vitro response of medical grade CoCrMo alloy processed via MIM compared to conventional processes. MIM of the CoCrMo alloy resulted in coarser polygonal grains, with largely varying sizes; however, these microstructural differences between MIM and forged/cast CoCrMo alloys showed a negligible effect on electrochemical properties. Passive current densities values observed were 0.49 µA cm(-2) for MIM specimens and 0.51 µA cm(-2) for forged CoCrMo specimens, with slightly lower transpassive potential in the MIM case; open circuit potential and Rp stationary values showed no significant differences. Moreover, in vitro biocompatibility tests resulted in cell viability levels not significantly different for MIM and conventionally processed alloys. Although preliminary, these results support the potential of MIM technology for the production of CoCrMo components of implantable devices.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metal injection molding as enabling technology for the production of metal prosthesis components: Electrochemical andin vitrocharacterization

Melli

Rondelli

Sandrini³

et al. 2013

J. Biomed. Mater. Res

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“…Sedangkan P.V Muterlle dan timnya menyebutkan bahwa penambahan 0,23% karbon mampu meningkatkan kekuatan tarik paduan menjadi 789 MPa pada hasil sinter paduan Co-Cr-Mo. Kekuatan tarik juga akan meningkat ketika dilakukan proses heat treatment [10] . Peningkatan kandungan karbon juga meningkatkan nilai kekerasan paduan CoCr-Mo sehingga material menjadi getas.…”

Section: Pendahuluanunclassified

Pengaruh Penambahan Karbon Dan Nitrogen Terhadap Mikrostruktur, Kekuatan Tarik Dan Mampu Bentuk Paduan Co-28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni [Influence of Additional Carbon And Nitrogen on Microstructure, Tensile Strength And Workability of Co- 28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni]

Rokhmanto¹,

Soegijono²,

Kartika³

2017

metal.

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IntisariPaduan Co-Cr-Mo banyak digunakan sebagi material implan tulang dan gigi, dimana komposisi paduan mengacu kepada standar material implan ASTM F75. Paduan Co-Cr-Mo memiliki sifat mekanis yang baik, bersifat biokompatibilitas dan memiliki ketahanan korosi yang tinggi. Tujuan penelitian ini adalah melihat pengaruh penambahan karbon dan nitrogen terhadap kekuatan tarik dan mampu bentuk paduan Co-28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni untuk memenuhi aplikasi di atas. Karbon ditambahkan ke dalam paduan sebesar 0,08; 0,15 dan 0,25 %berat, sedangkan nitrogen sebesar 0,2 %berat. Paduan hasil coran (as cast) kemudian dihomogenisasi pada temperatur 1200 °C selama 6 jam, lalu dilakukan prosess hot roll dengan pemanasan awal 1200 °C selama 1 jam dilanjutkan dengan quenching dalam media air. Paduan as cast maupun hasil hot roll kemudian diamati strukturnya dengan menggunakan mikroskop optik dan SEM serta dilakukan uji tarik untuk mengetahui sifat mekanik dan fraktografi patahan. Kekuatan tarik paduan Co-28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni meningkat seiring dengan meningkatnya penambahan karbon dalam paduan, sedangkan penambahan nitrogen meningkatkan mampu bentuk paduan Co-28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni.Kata Kunci: Paduan Co-28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni, karbon, nitrogen, mikrostruktur, kekuatan tarik, mampu bentuk 2Ni when used Abstract Co-Cr-Mo alloys are widely used as bone and dental implant materials, where the composition of the alloy refers to the standard ASTM F75. Co-Cr-Mo alloys has good mechanical properties, biocompatibility and high corrosion resistance. Objective of this paper is to investigate the influence of Carbon and Nitrogen on tensile strength and workability of

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“…CAS specimens were provided by SAMO SpA (Granarolo Emilia, Bologna, Itay) while MIM specimens, produced according to the process described in ref [9][10][11], were provided by Mimest (Pergine Valsugana, Trento, Italy).…”

Section: Materials Preparationmentioning

confidence: 99%

“…Metal Injection Molding (MIM) technology can provide quasi-net shape to raw materials, avoiding the machining step and saving resources up to about 20-50 % of the final cost [7]. In order to adjust the material properties to standard require-ments (ISO 5234-4; ASTM F75) the process was optimized in the last years through the evaluation of the effects of alloy composition, sintering temperature, thermal treatment and hot isostatic pressing on hardness, wear behavior and tensile properties of the MIM CoCrMo products [8][9][10][11]. A strict regulation (ASTM F2083/ISO 21536), requiring same prop-erties and behavior of the commercialized component at least Tibial trays of the most critical size, previously determined through FEM simulation of the load configuration foreseen in the fatigue test, were provided of the MIM type (TT-MIM), supplied again by Mimest, and of the cast type (TT-CAS), supplied by SAMO SpA.…”

Section: Introductionmentioning

confidence: 99%

Tribological and mechanical performance evaluation of metal prosthesis components manufactured via metal injection molding

Melli

Juszczyk²,

Sandrini³

et al. 2015

J Mater Sci: Mater Med

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The increasing number of total joint replacements, in particular for the knee joint, has a growing impact on the healthcare system costs. New cost-saving manufacturing technologies are being explored nowadays. Metal injection molding (MIM) has already demonstrated its suitability for the production of CoCrMo alloy tibial trays, with a significant reduction in production costs, by holding both corrosion resistance and biocompatibility. In this work, mechanical and tribological properties were evaluated on tibial trays obtained via MIM and conventional investment casting. Surface hardness and wear properties were evaluated through Vickers hardness, scratch and pin on disk tests. The MIM and cast finished tibial trays were then subjected to a fatigue test campaign in order to obtain their fatigue load limit at 5 millions cycles following ISO 14879-1 directions. CoCrMo cast alloy exhibited 514 HV hardness compared to 335 HV of MIM alloy, furthermore it developed narrower scratches with a higher tendency towards microploughing than microcutting, in comparison to MIM CoCrMo. The observed fatigue limits were (1,766 ± 52) N for cast tibial trays and (1,625 ± 44) N for MIM ones. Fracture morphologies pointed out to a more brittle behavior of MIM microstructure. These aspects were attributed to the absence of a fine toughening and surface hardening carbide dispersion in MIM grains. Nevertheless, MIM tibial trays exhibited a fatigue limit far beyond the 900 N of maximum load prescribed by ISO and ASTM standards for the clinical application of these devices.

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Microstructure and tensile properties of metal injection molding Co–29Cr–6Mo–0.23C alloy

Cited by 24 publications

References 14 publications

Metal injection molding as enabling technology for the production of metal prosthesis components: Electrochemical andin vitrocharacterization

Metal injection molding as enabling technology for the production of metal prosthesis components: Electrochemical andin vitrocharacterization

Pengaruh Penambahan Karbon Dan Nitrogen Terhadap Mikrostruktur, Kekuatan Tarik Dan Mampu Bentuk Paduan Co-28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni [Influence of Additional Carbon And Nitrogen on Microstructure, Tensile Strength And Workability of Co- 28Cr-6Mo-0,8Si-0,8Mn-0,4Fe-0,2Ni]

Tribological and mechanical performance evaluation of metal prosthesis components manufactured via metal injection molding

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