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pro vyhledávání: '"Hidefumi Date"'
Autor:
Hidefumi Date
Publikováno v:
Applied Mechanics and Materials. 566:152-157
Austenitic stainless steel was compressed at a strain rates of 103 s-1 using a Hopkinson pressure bar apparatus at temperatures of 77 K and 293 K. The electrical resistivity was measured to determine the volume fraction of martensite of a deforming s
Publikováno v:
Procedia Engineering. 10:857-862
A Compressive test on Zr-based metallic glass was performed using a universal testing machine. The fracture process was recorded by high-speed video camera with a recording rate of 125,000 fps. The specimen was shear-fractured at 1.9 GPa accompanied
Autor:
Hidefumi Date
Publikováno v:
Journal of the Society of Materials Science, Japan. 60:721-727
To estimate the volume fraction of martensite induced in austenitic stainless steel during tensile deformation, the resistivity of a specimen was measured at a temperature of 77, 187 or 293K. Since the distribution of the martensite in the specimen w
Autor:
Hidefumi Date
Publikováno v:
Materials Science Forum. :2992-2997
The martensite induced in three types of austenitic stainless steel, which indicate the different stability of the austenitic phase (γ), were estimated by the resistivity measured during the tensile deformation or compressive deformation at the temp
Autor:
Hidefumi Date
Publikováno v:
International Journal of Modern Physics B. 22:1659-1665
Impact welding has been carried out using a projectile having a diameter of 11 and 5 mm at an impact velocity of 200 m/s or more. A large projectile regardless of the slenderness ratio, was welded to a stainless steel target. However, only a small pr
Autor:
Hidefumi Date
Publikováno v:
Journal of High Temperature Society. 34:178-185
Autor:
Hidefumi Date, Masaaki Naka
Publikováno v:
Solid State Phenomena. 127:283-288
When a cylindrical projectile is impact-welded to a flat target, a compound layer is usually observed at the joining interface as a result of the impact welding. In this study, the formation process of the compound layer was formulated as a moving bo
Autor:
Hidefumi Date
Publikováno v:
Materials Science Forum. :3231-3236
In order to clarify the effect of strain rates on phase transformation behaviors of Ni-Ti alloy, a compressive test using a cylindrical specimen of polycrystalline Ni-Ti alloy of Ti-50.69 at% Ni was carried out at a high strain rate and a low strain
Autor:
Hidefumi Date, Masatoshi Futakawa
Publikováno v:
International Journal of Impact Engineering. 32:118-129
Impact erosion tests were carried out in mercury by using a direct tension Split Hopkinson Bar to investigate the formation behavior of pits. A stainless steel specimen was screwed to the end of the elastic bar and immersed in mercury. The polished s
Publikováno v:
Materials Science Forum. 502:455-460
The impact welding of aluminum onto copper was carried out using a gas gun and the mechanical properties of Al/Cu joint were investigated by tensile tests and micro hardness indentation tests. The strength measured by tensile test decreased with incr