The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform

Makoto Yoshida - One of the best experts on this subject based on the ideXlab platform.

  • a parameterization method of recovery behavior based on initial yield stress pre Strain Diagram for an al si cu high pressure die casting alloy
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017
    Co-Authors: Yuichi Motoyama, Gota Saito, Hiromi Ono, Makoto Yoshida
    Abstract:

    Abstract Consideration of recovery behavior in the constitutive equation of alloy is crucially important for accurate thermal stress analysis of the casting process. However, previously reported empirical equations present difficulties when including a coefficient that determines the ratio of the recovery (or Strain-hardening) Strain component because the alloy recovery behavior has not been investigated systematically. First, this study systematically revealed effects of the temperature and amount of inelastic Strain at 200–440 °C on the increase of the initial yield stress of the room temperature (RT) in an Al-Si-Cu high-pressure die casting alloy. Secondly, from those results, an initial yield stress – pre-Strain Diagram was proposed, demonstrating the effect of the amount of the inelastic Strain given at each temperature on the increase of the initial yield stress of RT. Finally, this study newly defined a temperature-dependent contribution ratio of Strain hardening to parameterize and duplicate the alloy recovery behavior based on the initial yield stress – pre-Strain Diagram for the constitutive equation of the alloy. Using this ratio as the coefficient to determine the proportion of the Strain contributing the Strain hardening for the constitutive equation, thermal stress analysis can produce more accurate duplication of the experimentally determined recovery behavior. Thereby, the residual stress and deformation of the component in the casting process can be predicted more accurately than when using conventional empirical constitutive equations.

  • A parameterization method of recovery behavior based on initial yield stress – pre-Strain Diagram for an Al-Si-Cu high pressure die-casting alloy
    Materials Science and Engineering: A, 2017
    Co-Authors: Yuichi Motoyama, Gota Saito, Hiromi Ono, Makoto Yoshida
    Abstract:

    Abstract Consideration of recovery behavior in the constitutive equation of alloy is crucially important for accurate thermal stress analysis of the casting process. However, previously reported empirical equations present difficulties when including a coefficient that determines the ratio of the recovery (or Strain-hardening) Strain component because the alloy recovery behavior has not been investigated systematically. First, this study systematically revealed effects of the temperature and amount of inelastic Strain at 200–440 °C on the increase of the initial yield stress of the room temperature (RT) in an Al-Si-Cu high-pressure die casting alloy. Secondly, from those results, an initial yield stress – pre-Strain Diagram was proposed, demonstrating the effect of the amount of the inelastic Strain given at each temperature on the increase of the initial yield stress of RT. Finally, this study newly defined a temperature-dependent contribution ratio of Strain hardening to parameterize and duplicate the alloy recovery behavior based on the initial yield stress – pre-Strain Diagram for the constitutive equation of the alloy. Using this ratio as the coefficient to determine the proportion of the Strain contributing the Strain hardening for the constitutive equation, thermal stress analysis can produce more accurate duplication of the experimentally determined recovery behavior. Thereby, the residual stress and deformation of the component in the casting process can be predicted more accurately than when using conventional empirical constitutive equations.

Yuichi Motoyama - One of the best experts on this subject based on the ideXlab platform.

  • a parameterization method of recovery behavior based on initial yield stress pre Strain Diagram for an al si cu high pressure die casting alloy
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017
    Co-Authors: Yuichi Motoyama, Gota Saito, Hiromi Ono, Makoto Yoshida
    Abstract:

    Abstract Consideration of recovery behavior in the constitutive equation of alloy is crucially important for accurate thermal stress analysis of the casting process. However, previously reported empirical equations present difficulties when including a coefficient that determines the ratio of the recovery (or Strain-hardening) Strain component because the alloy recovery behavior has not been investigated systematically. First, this study systematically revealed effects of the temperature and amount of inelastic Strain at 200–440 °C on the increase of the initial yield stress of the room temperature (RT) in an Al-Si-Cu high-pressure die casting alloy. Secondly, from those results, an initial yield stress – pre-Strain Diagram was proposed, demonstrating the effect of the amount of the inelastic Strain given at each temperature on the increase of the initial yield stress of RT. Finally, this study newly defined a temperature-dependent contribution ratio of Strain hardening to parameterize and duplicate the alloy recovery behavior based on the initial yield stress – pre-Strain Diagram for the constitutive equation of the alloy. Using this ratio as the coefficient to determine the proportion of the Strain contributing the Strain hardening for the constitutive equation, thermal stress analysis can produce more accurate duplication of the experimentally determined recovery behavior. Thereby, the residual stress and deformation of the component in the casting process can be predicted more accurately than when using conventional empirical constitutive equations.

  • A parameterization method of recovery behavior based on initial yield stress – pre-Strain Diagram for an Al-Si-Cu high pressure die-casting alloy
    Materials Science and Engineering: A, 2017
    Co-Authors: Yuichi Motoyama, Gota Saito, Hiromi Ono, Makoto Yoshida
    Abstract:

    Abstract Consideration of recovery behavior in the constitutive equation of alloy is crucially important for accurate thermal stress analysis of the casting process. However, previously reported empirical equations present difficulties when including a coefficient that determines the ratio of the recovery (or Strain-hardening) Strain component because the alloy recovery behavior has not been investigated systematically. First, this study systematically revealed effects of the temperature and amount of inelastic Strain at 200–440 °C on the increase of the initial yield stress of the room temperature (RT) in an Al-Si-Cu high-pressure die casting alloy. Secondly, from those results, an initial yield stress – pre-Strain Diagram was proposed, demonstrating the effect of the amount of the inelastic Strain given at each temperature on the increase of the initial yield stress of RT. Finally, this study newly defined a temperature-dependent contribution ratio of Strain hardening to parameterize and duplicate the alloy recovery behavior based on the initial yield stress – pre-Strain Diagram for the constitutive equation of the alloy. Using this ratio as the coefficient to determine the proportion of the Strain contributing the Strain hardening for the constitutive equation, thermal stress analysis can produce more accurate duplication of the experimentally determined recovery behavior. Thereby, the residual stress and deformation of the component in the casting process can be predicted more accurately than when using conventional empirical constitutive equations.

Hiromi Ono - One of the best experts on this subject based on the ideXlab platform.

  • a parameterization method of recovery behavior based on initial yield stress pre Strain Diagram for an al si cu high pressure die casting alloy
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017
    Co-Authors: Yuichi Motoyama, Gota Saito, Hiromi Ono, Makoto Yoshida
    Abstract:

    Abstract Consideration of recovery behavior in the constitutive equation of alloy is crucially important for accurate thermal stress analysis of the casting process. However, previously reported empirical equations present difficulties when including a coefficient that determines the ratio of the recovery (or Strain-hardening) Strain component because the alloy recovery behavior has not been investigated systematically. First, this study systematically revealed effects of the temperature and amount of inelastic Strain at 200–440 °C on the increase of the initial yield stress of the room temperature (RT) in an Al-Si-Cu high-pressure die casting alloy. Secondly, from those results, an initial yield stress – pre-Strain Diagram was proposed, demonstrating the effect of the amount of the inelastic Strain given at each temperature on the increase of the initial yield stress of RT. Finally, this study newly defined a temperature-dependent contribution ratio of Strain hardening to parameterize and duplicate the alloy recovery behavior based on the initial yield stress – pre-Strain Diagram for the constitutive equation of the alloy. Using this ratio as the coefficient to determine the proportion of the Strain contributing the Strain hardening for the constitutive equation, thermal stress analysis can produce more accurate duplication of the experimentally determined recovery behavior. Thereby, the residual stress and deformation of the component in the casting process can be predicted more accurately than when using conventional empirical constitutive equations.

  • A parameterization method of recovery behavior based on initial yield stress – pre-Strain Diagram for an Al-Si-Cu high pressure die-casting alloy
    Materials Science and Engineering: A, 2017
    Co-Authors: Yuichi Motoyama, Gota Saito, Hiromi Ono, Makoto Yoshida
    Abstract:

    Abstract Consideration of recovery behavior in the constitutive equation of alloy is crucially important for accurate thermal stress analysis of the casting process. However, previously reported empirical equations present difficulties when including a coefficient that determines the ratio of the recovery (or Strain-hardening) Strain component because the alloy recovery behavior has not been investigated systematically. First, this study systematically revealed effects of the temperature and amount of inelastic Strain at 200–440 °C on the increase of the initial yield stress of the room temperature (RT) in an Al-Si-Cu high-pressure die casting alloy. Secondly, from those results, an initial yield stress – pre-Strain Diagram was proposed, demonstrating the effect of the amount of the inelastic Strain given at each temperature on the increase of the initial yield stress of RT. Finally, this study newly defined a temperature-dependent contribution ratio of Strain hardening to parameterize and duplicate the alloy recovery behavior based on the initial yield stress – pre-Strain Diagram for the constitutive equation of the alloy. Using this ratio as the coefficient to determine the proportion of the Strain contributing the Strain hardening for the constitutive equation, thermal stress analysis can produce more accurate duplication of the experimentally determined recovery behavior. Thereby, the residual stress and deformation of the component in the casting process can be predicted more accurately than when using conventional empirical constitutive equations.

Gota Saito - One of the best experts on this subject based on the ideXlab platform.

  • a parameterization method of recovery behavior based on initial yield stress pre Strain Diagram for an al si cu high pressure die casting alloy
    Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2017
    Co-Authors: Yuichi Motoyama, Gota Saito, Hiromi Ono, Makoto Yoshida
    Abstract:

    Abstract Consideration of recovery behavior in the constitutive equation of alloy is crucially important for accurate thermal stress analysis of the casting process. However, previously reported empirical equations present difficulties when including a coefficient that determines the ratio of the recovery (or Strain-hardening) Strain component because the alloy recovery behavior has not been investigated systematically. First, this study systematically revealed effects of the temperature and amount of inelastic Strain at 200–440 °C on the increase of the initial yield stress of the room temperature (RT) in an Al-Si-Cu high-pressure die casting alloy. Secondly, from those results, an initial yield stress – pre-Strain Diagram was proposed, demonstrating the effect of the amount of the inelastic Strain given at each temperature on the increase of the initial yield stress of RT. Finally, this study newly defined a temperature-dependent contribution ratio of Strain hardening to parameterize and duplicate the alloy recovery behavior based on the initial yield stress – pre-Strain Diagram for the constitutive equation of the alloy. Using this ratio as the coefficient to determine the proportion of the Strain contributing the Strain hardening for the constitutive equation, thermal stress analysis can produce more accurate duplication of the experimentally determined recovery behavior. Thereby, the residual stress and deformation of the component in the casting process can be predicted more accurately than when using conventional empirical constitutive equations.

  • A parameterization method of recovery behavior based on initial yield stress – pre-Strain Diagram for an Al-Si-Cu high pressure die-casting alloy
    Materials Science and Engineering: A, 2017
    Co-Authors: Yuichi Motoyama, Gota Saito, Hiromi Ono, Makoto Yoshida
    Abstract:

    Abstract Consideration of recovery behavior in the constitutive equation of alloy is crucially important for accurate thermal stress analysis of the casting process. However, previously reported empirical equations present difficulties when including a coefficient that determines the ratio of the recovery (or Strain-hardening) Strain component because the alloy recovery behavior has not been investigated systematically. First, this study systematically revealed effects of the temperature and amount of inelastic Strain at 200–440 °C on the increase of the initial yield stress of the room temperature (RT) in an Al-Si-Cu high-pressure die casting alloy. Secondly, from those results, an initial yield stress – pre-Strain Diagram was proposed, demonstrating the effect of the amount of the inelastic Strain given at each temperature on the increase of the initial yield stress of RT. Finally, this study newly defined a temperature-dependent contribution ratio of Strain hardening to parameterize and duplicate the alloy recovery behavior based on the initial yield stress – pre-Strain Diagram for the constitutive equation of the alloy. Using this ratio as the coefficient to determine the proportion of the Strain contributing the Strain hardening for the constitutive equation, thermal stress analysis can produce more accurate duplication of the experimentally determined recovery behavior. Thereby, the residual stress and deformation of the component in the casting process can be predicted more accurately than when using conventional empirical constitutive equations.

Ewald Werner - One of the best experts on this subject based on the ideXlab platform.

  • an unexpected feature of the stress Strain Diagram of dual phase steel
    Computational Materials Science, 2002
    Co-Authors: U Liedl, S Traint, Ewald Werner
    Abstract:

    Abstract The microstructure of low alloyed ferritic–martensitic dual-phase steels as used for deep drawn parts in automotive applications consists of coarse grained hard martensitic inclusions embedded in a soft ferritic matrix. In tensile tests commercially produced dual-phase steels show an unexpected dependence of their initial yield behaviour on the content of martensite. The impact of the thermomechanical history on the mechanical properties of the material is demonstrated by means of a fully three-dimensional finite element analysis. A work-hardened ferritic skeleton formed during rapid cooling connects the martensitic inclusions and governs the initial stages of plastic deformation. The model correctly predicts both the experimentally observed dependence of the proof stress on the amount of martensite and a lower initial slope of the stress–Strain Diagram.

  • An unexpected feature of the stress–Strain Diagram of dual-phase steel
    Computational Materials Science, 2002
    Co-Authors: U Liedl, S Traint, Ewald Werner
    Abstract:

    Abstract The microstructure of low alloyed ferritic–martensitic dual-phase steels as used for deep drawn parts in automotive applications consists of coarse grained hard martensitic inclusions embedded in a soft ferritic matrix. In tensile tests commercially produced dual-phase steels show an unexpected dependence of their initial yield behaviour on the content of martensite. The impact of the thermomechanical history on the mechanical properties of the material is demonstrated by means of a fully three-dimensional finite element analysis. A work-hardened ferritic skeleton formed during rapid cooling connects the martensitic inclusions and governs the initial stages of plastic deformation. The model correctly predicts both the experimentally observed dependence of the proof stress on the amount of martensite and a lower initial slope of the stress–Strain Diagram.