Satoshi Utada
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View article: Profilometry‐Based Indentation Plastometry at High Temperature
Profilometry‐Based Indentation Plastometry at High Temperature Open
This is a first report on profilometry‐based indentation plastometry (PIP) at high temperature (HT), covering both thermal characterization and issues for obtaining stress–strain curves. The heating system has a relatively low thermal iner…
View article: Ultralow‐Temperature Sintering of Titanium Powder by Spark Plasma Sintering Under Cyclic Pressure
Ultralow‐Temperature Sintering of Titanium Powder by Spark Plasma Sintering Under Cyclic Pressure Open
Spark plasma sintering (SPS) is a promising method for producing titanium components from powder but a limitation is that high sintering temperatures (>900 °C) are normally required to eliminate porosity. Herein, the SPS of commercially pu…
View article: The evolution of subsurface deformation and tribological degradation of a multiphase Fe-based hardfacing induced by sliding contact
The evolution of subsurface deformation and tribological degradation of a multiphase Fe-based hardfacing induced by sliding contact Open
Multiphase Fe-based hardfacing alloys, for example Tristelle 5183 Fe-21%Cr-10%Ni-7.5%Nb-5%Si-2%C in wt.%, are extensively used for tribological applications, including valves, bearings and drive mechanisms, where two surfaces are unavoidab…
View article: Deformation Mechanisms Rationalisation to Design for Creep Resistance in Polycrystalline Ni-Based Superalloys
Deformation Mechanisms Rationalisation to Design for Creep Resistance in Polycrystalline Ni-Based Superalloys Open
Creep strength in polycrystalline Ni-based superalloys is influenced by the formation of a rich variety of planar faults forming within the strengthening $$\gamma '$$ phase. The lengthening and thickening rate of these faults – and the…
View article: In-Situ Monitoring of Phase Transition and Microstructure Evolution in Ni-Based Superalloys by Electrical Resistivity: Direct Comparison With Differential Scanning Calorimetry and Application to Case Studies
In-Situ Monitoring of Phase Transition and Microstructure Evolution in Ni-Based Superalloys by Electrical Resistivity: Direct Comparison With Differential Scanning Calorimetry and Application to Case Studies Open
In this study, resistivity measurements are made during continuous heating and cooling on four different Ni-based superalloys of different grain structures and with different phases ( i.e ., γ ′ and carbide). The results are directly compa…
View article: Alloy Design for Additive Manufacturing: Early-Stage Oxidation of Nickel-Based Superalloys
Alloy Design for Additive Manufacturing: Early-Stage Oxidation of Nickel-Based Superalloys Open
This body of work aims to inform alloy design for additive manufacturing by investigating the early-stage oxidation behavior of Ni-based superalloys processed by laser-powder bed fusion. The oxidation of 14 Ni-based superalloys—some novel …
View article: A Comparative Study of High Temperature Tensile and Creep Testing Between Standard and Miniature Specimens: Applicability and Limits
A Comparative Study of High Temperature Tensile and Creep Testing Between Standard and Miniature Specimens: Applicability and Limits Open
This study concerns the quasi-static and time-dependent mechanical behavior obtained via the miniaturized electro-thermal mechanical testing (ETMT) approach for single crystal (SX) and conventional cast Mar-M-247 superalloy. The experiment…
View article: Overheating of Waspaloy: Effect of cooling rate on flow stress behavior
Overheating of Waspaloy: Effect of cooling rate on flow stress behavior Open
During service of a gas turbine engine, components may suffer instant overheating which is a concern to safe operations. Effect of short overheating on the tensile properties of a Ni-based superalloy Waspaloy has been studied due to its si…
View article: Ultra-High Temperature Creep of Ni-Based SX Superalloys at 1250 °C
Ultra-High Temperature Creep of Ni-Based SX Superalloys at 1250 °C Open
Very high temperature creep properties of twelve different Ni-based single crystal superalloys have been investigated at 1250 °C and under different initial applied stresses. The creep strength at this temperature is mainly controlled by t…
View article: Effect of a Prior Plastic Deformation during Heat Treatments on the Mechanical Properties of Ni-Based Superalloys for Turbine Blade Application
Effect of a Prior Plastic Deformation during Heat Treatments on the Mechanical Properties of Ni-Based Superalloys for Turbine Blade Application Open
Ni-based single crystal (SX) superalloys are used for turbine blade applications because of their high-temperature durability. During the production of a turbine blade, unexpected plastic deformation (PD) can be introduced to the material.…
View article: Effect of Sulfur on Creep Strength of Ni-Base Single-Crystal Superalloy, TMS-1700
Effect of Sulfur on Creep Strength of Ni-Base Single-Crystal Superalloy, TMS-1700 Open
We studied the effect of sulfur addition on a Ni-base single-crystal superalloy, TMS-1700, by performing creep tests at 1100℃/137 MPa using specimens doped with 0, 10, 20, and 100 ppm sulfur. The creep rupture life was found to decrease wi…