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R Caram - One of the best experts on this subject based on the ideXlab platform.

  • high resolution transmission electron microscopy study of the hardening mechanism through phase separation in a β ti 35nb 7zr 5ta alloy for implant applications
    Acta Biomaterialia, 2010
    Co-Authors: Conrado Ramos Moreira Afonso, P L Ferrandini, Antonio J Ramirez, R Caram
    Abstract:

    Abstract β-Ti alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. This work aims to clarify the hardening mechanism of a β-Ti–Nb–Zr–Ta alloy using different characterization techniques. Ingots (50 g) of Ti–35Nb–7Zr–5Ta (wt.%) alloy were arc furnace melted in an Ar(g) atmosphere, homogenized, hot rolled, solubilized and finally aged at several temperatures from 200 to 700 °C for 4 h. Microstructure characterization was performed using X-ray diffraction, optical microscopy, scanning and high resolution transmission electron microscopy (HR-TEM). The 4 h aging showed that the highest hardness values were found when aged at 400 °C and the HR-TEM images confirmed splitting of spots on the Fourier space Map, which indicated the presence of a coherent interface between separated phases (β and β′) and explains the hardening mechanism of the alloy. Through geometric phase analysis analysis, using the HR-TEM image, the localized Strain Map showed 5–10 nm domains of the β and β′ phases. The combination of suitable values of yield strength, hardness and low Young’s modulus makes Ti–35Nb–7Zr–5Ta alloy suitable for medical applications as a metallic orthopedic implant.

  • High resolution transmission electron microscopy study of the hardening mechanism through phase separation in a β-Ti–35Nb–7Zr–5Ta alloy for implant applications
    Acta biomaterialia, 2009
    Co-Authors: Conrado Ramos Moreira Afonso, P L Ferrandini, Antonio J Ramirez, R Caram
    Abstract:

    Abstract β-Ti alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. This work aims to clarify the hardening mechanism of a β-Ti–Nb–Zr–Ta alloy using different characterization techniques. Ingots (50 g) of Ti–35Nb–7Zr–5Ta (wt.%) alloy were arc furnace melted in an Ar(g) atmosphere, homogenized, hot rolled, solubilized and finally aged at several temperatures from 200 to 700 °C for 4 h. Microstructure characterization was performed using X-ray diffraction, optical microscopy, scanning and high resolution transmission electron microscopy (HR-TEM). The 4 h aging showed that the highest hardness values were found when aged at 400 °C and the HR-TEM images confirmed splitting of spots on the Fourier space Map, which indicated the presence of a coherent interface between separated phases (β and β′) and explains the hardening mechanism of the alloy. Through geometric phase analysis analysis, using the HR-TEM image, the localized Strain Map showed 5–10 nm domains of the β and β′ phases. The combination of suitable values of yield strength, hardness and low Young’s modulus makes Ti–35Nb–7Zr–5Ta alloy suitable for medical applications as a metallic orthopedic implant.

Conrado Ramos Moreira Afonso - One of the best experts on this subject based on the ideXlab platform.

  • high resolution transmission electron microscopy study of the hardening mechanism through phase separation in a β ti 35nb 7zr 5ta alloy for implant applications
    Acta Biomaterialia, 2010
    Co-Authors: Conrado Ramos Moreira Afonso, P L Ferrandini, Antonio J Ramirez, R Caram
    Abstract:

    Abstract β-Ti alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. This work aims to clarify the hardening mechanism of a β-Ti–Nb–Zr–Ta alloy using different characterization techniques. Ingots (50 g) of Ti–35Nb–7Zr–5Ta (wt.%) alloy were arc furnace melted in an Ar(g) atmosphere, homogenized, hot rolled, solubilized and finally aged at several temperatures from 200 to 700 °C for 4 h. Microstructure characterization was performed using X-ray diffraction, optical microscopy, scanning and high resolution transmission electron microscopy (HR-TEM). The 4 h aging showed that the highest hardness values were found when aged at 400 °C and the HR-TEM images confirmed splitting of spots on the Fourier space Map, which indicated the presence of a coherent interface between separated phases (β and β′) and explains the hardening mechanism of the alloy. Through geometric phase analysis analysis, using the HR-TEM image, the localized Strain Map showed 5–10 nm domains of the β and β′ phases. The combination of suitable values of yield strength, hardness and low Young’s modulus makes Ti–35Nb–7Zr–5Ta alloy suitable for medical applications as a metallic orthopedic implant.

  • High resolution transmission electron microscopy study of the hardening mechanism through phase separation in a β-Ti–35Nb–7Zr–5Ta alloy for implant applications
    Acta biomaterialia, 2009
    Co-Authors: Conrado Ramos Moreira Afonso, P L Ferrandini, Antonio J Ramirez, R Caram
    Abstract:

    Abstract β-Ti alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. This work aims to clarify the hardening mechanism of a β-Ti–Nb–Zr–Ta alloy using different characterization techniques. Ingots (50 g) of Ti–35Nb–7Zr–5Ta (wt.%) alloy were arc furnace melted in an Ar(g) atmosphere, homogenized, hot rolled, solubilized and finally aged at several temperatures from 200 to 700 °C for 4 h. Microstructure characterization was performed using X-ray diffraction, optical microscopy, scanning and high resolution transmission electron microscopy (HR-TEM). The 4 h aging showed that the highest hardness values were found when aged at 400 °C and the HR-TEM images confirmed splitting of spots on the Fourier space Map, which indicated the presence of a coherent interface between separated phases (β and β′) and explains the hardening mechanism of the alloy. Through geometric phase analysis analysis, using the HR-TEM image, the localized Strain Map showed 5–10 nm domains of the β and β′ phases. The combination of suitable values of yield strength, hardness and low Young’s modulus makes Ti–35Nb–7Zr–5Ta alloy suitable for medical applications as a metallic orthopedic implant.

P L Ferrandini - One of the best experts on this subject based on the ideXlab platform.

  • high resolution transmission electron microscopy study of the hardening mechanism through phase separation in a β ti 35nb 7zr 5ta alloy for implant applications
    Acta Biomaterialia, 2010
    Co-Authors: Conrado Ramos Moreira Afonso, P L Ferrandini, Antonio J Ramirez, R Caram
    Abstract:

    Abstract β-Ti alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. This work aims to clarify the hardening mechanism of a β-Ti–Nb–Zr–Ta alloy using different characterization techniques. Ingots (50 g) of Ti–35Nb–7Zr–5Ta (wt.%) alloy were arc furnace melted in an Ar(g) atmosphere, homogenized, hot rolled, solubilized and finally aged at several temperatures from 200 to 700 °C for 4 h. Microstructure characterization was performed using X-ray diffraction, optical microscopy, scanning and high resolution transmission electron microscopy (HR-TEM). The 4 h aging showed that the highest hardness values were found when aged at 400 °C and the HR-TEM images confirmed splitting of spots on the Fourier space Map, which indicated the presence of a coherent interface between separated phases (β and β′) and explains the hardening mechanism of the alloy. Through geometric phase analysis analysis, using the HR-TEM image, the localized Strain Map showed 5–10 nm domains of the β and β′ phases. The combination of suitable values of yield strength, hardness and low Young’s modulus makes Ti–35Nb–7Zr–5Ta alloy suitable for medical applications as a metallic orthopedic implant.

  • High resolution transmission electron microscopy study of the hardening mechanism through phase separation in a β-Ti–35Nb–7Zr–5Ta alloy for implant applications
    Acta biomaterialia, 2009
    Co-Authors: Conrado Ramos Moreira Afonso, P L Ferrandini, Antonio J Ramirez, R Caram
    Abstract:

    Abstract β-Ti alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. This work aims to clarify the hardening mechanism of a β-Ti–Nb–Zr–Ta alloy using different characterization techniques. Ingots (50 g) of Ti–35Nb–7Zr–5Ta (wt.%) alloy were arc furnace melted in an Ar(g) atmosphere, homogenized, hot rolled, solubilized and finally aged at several temperatures from 200 to 700 °C for 4 h. Microstructure characterization was performed using X-ray diffraction, optical microscopy, scanning and high resolution transmission electron microscopy (HR-TEM). The 4 h aging showed that the highest hardness values were found when aged at 400 °C and the HR-TEM images confirmed splitting of spots on the Fourier space Map, which indicated the presence of a coherent interface between separated phases (β and β′) and explains the hardening mechanism of the alloy. Through geometric phase analysis analysis, using the HR-TEM image, the localized Strain Map showed 5–10 nm domains of the β and β′ phases. The combination of suitable values of yield strength, hardness and low Young’s modulus makes Ti–35Nb–7Zr–5Ta alloy suitable for medical applications as a metallic orthopedic implant.

Antonio J Ramirez - One of the best experts on this subject based on the ideXlab platform.

  • high resolution transmission electron microscopy study of the hardening mechanism through phase separation in a β ti 35nb 7zr 5ta alloy for implant applications
    Acta Biomaterialia, 2010
    Co-Authors: Conrado Ramos Moreira Afonso, P L Ferrandini, Antonio J Ramirez, R Caram
    Abstract:

    Abstract β-Ti alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. This work aims to clarify the hardening mechanism of a β-Ti–Nb–Zr–Ta alloy using different characterization techniques. Ingots (50 g) of Ti–35Nb–7Zr–5Ta (wt.%) alloy were arc furnace melted in an Ar(g) atmosphere, homogenized, hot rolled, solubilized and finally aged at several temperatures from 200 to 700 °C for 4 h. Microstructure characterization was performed using X-ray diffraction, optical microscopy, scanning and high resolution transmission electron microscopy (HR-TEM). The 4 h aging showed that the highest hardness values were found when aged at 400 °C and the HR-TEM images confirmed splitting of spots on the Fourier space Map, which indicated the presence of a coherent interface between separated phases (β and β′) and explains the hardening mechanism of the alloy. Through geometric phase analysis analysis, using the HR-TEM image, the localized Strain Map showed 5–10 nm domains of the β and β′ phases. The combination of suitable values of yield strength, hardness and low Young’s modulus makes Ti–35Nb–7Zr–5Ta alloy suitable for medical applications as a metallic orthopedic implant.

  • High resolution transmission electron microscopy study of the hardening mechanism through phase separation in a β-Ti–35Nb–7Zr–5Ta alloy for implant applications
    Acta biomaterialia, 2009
    Co-Authors: Conrado Ramos Moreira Afonso, P L Ferrandini, Antonio J Ramirez, R Caram
    Abstract:

    Abstract β-Ti alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. This work aims to clarify the hardening mechanism of a β-Ti–Nb–Zr–Ta alloy using different characterization techniques. Ingots (50 g) of Ti–35Nb–7Zr–5Ta (wt.%) alloy were arc furnace melted in an Ar(g) atmosphere, homogenized, hot rolled, solubilized and finally aged at several temperatures from 200 to 700 °C for 4 h. Microstructure characterization was performed using X-ray diffraction, optical microscopy, scanning and high resolution transmission electron microscopy (HR-TEM). The 4 h aging showed that the highest hardness values were found when aged at 400 °C and the HR-TEM images confirmed splitting of spots on the Fourier space Map, which indicated the presence of a coherent interface between separated phases (β and β′) and explains the hardening mechanism of the alloy. Through geometric phase analysis analysis, using the HR-TEM image, the localized Strain Map showed 5–10 nm domains of the β and β′ phases. The combination of suitable values of yield strength, hardness and low Young’s modulus makes Ti–35Nb–7Zr–5Ta alloy suitable for medical applications as a metallic orthopedic implant.

Etsuko Kobayashi - One of the best experts on this subject based on the ideXlab platform.

  • motion tracking and Strain Map computation for quasi static magnetic resonance elastography
    Medical Image Computing and Computer-Assisted Intervention, 2011
    Co-Authors: Cheekong Chui, Chee Leong Teo, Etsuko Kobayashi
    Abstract:

    This paper presents a new imaging method for quasi-static magnetic resonance elastography (MRE). Tagged magnetic resonance (MR) imaging of human lower leg was acquired with probe indentation using a MR-compatible actuation system. Indentation force was recorded for soft tissue elasticity reconstruction. Motion tracking and Strain Map of human lower leg are calculated using a harmonic phase (HARP)-based method. Simulated tagged MR images were constructed and analyzed to validate the HARP-based method. Our results show that the proposed imaging method can be used to generate accurate motion distribution and Strain Maps of the targeted soft tissue.

  • MICCAI (1) - Motion tracking and Strain Map computation for quasi-static magnetic resonance elastography
    Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Inte, 2011
    Co-Authors: Cheekong Chui, Chee Leong Teo, Etsuko Kobayashi
    Abstract:

    This paper presents a new imaging method for quasi-static magnetic resonance elastography (MRE). Tagged magnetic resonance (MR) imaging of human lower leg was acquired with probe indentation using a MR-compatible actuation system. Indentation force was recorded for soft tissue elasticity reconstruction. Motion tracking and Strain Map of human lower leg are calculated using a harmonic phase (HARP)-based method. Simulated tagged MR images were constructed and analyzed to validate the HARP-based method. Our results show that the proposed imaging method can be used to generate accurate motion distribution and Strain Maps of the targeted soft tissue.