The Effect of Si Addition on the Microstructure, Mechanical Properties, and Wear Rate of the Co–Cr–Mo-Based Biomedical Alloys

Basha, Muhammad; Moustafa, Essam B.; Ibrahim, Khaled M.; Basha, M. A.; Mosleh, Ahmed O.

doi:10.1007/s12633-023-02557-6

Cited by 3 publications

(1 citation statement)

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“…While in service in the human body, these implants are subjected to cyclic loads, corrosion environments, and significant wear [1][2][3]. Co-Cr-Mo alloys are characterized by high values of mechanical properties combined with good resistance to corrosion and wear [4][5][6]. In addition, these alloys have an acceptable level of biocompatibility [7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Microstructure Evolution of Co-Cr-Mo Alloy during Isothermal Forging

Gamin,

Skugorev,

Karashaev

et al. 2023

Metals

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The article analyzes the microstructure evolution of Co-Cr-Mo alloy during isothermal forging. The process of isothermal forging can be a technological solution to produce a semi-finished product for subsequent deformation processing and obtain a high-quality microstructure that excludes casting defects. Based on analysis of microstructure and phase composition and calculations, the required modes of ingot homogenization are determined. Finite element method simulation of the forging has shown that temperature and deformation conditions make deformation in the single-phase γ-region possible. However, at lower temperatures, σ-phase particles may precipitate at the last steps of deformation. After isothermal forging and water quenching, a mixture of recrystallized and polygonized structures with an average grain size of 5–10 μm and precipitation of ultra-fine dispersed particles of σ-phase (~0.13 μm) at grain boundaries are formed. Isothermal forging in the temperature range of 1100–1200 °C and at low strain rates of up to 1 s−1 allows obtaining a microstructure without pores, cracks, and large inclusions. Thus, it makes it possible to use the forging billet for further deformation by different metal forming methods.

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