high frequency torsional testing of ni alloy|Very high cycle fatigue behaviors of GH4169 superalloy at room : trader The high weldability and corrosion resistance of nickel alloy 718 (IN718) make it an ideal material for laser powder-bed fusion (LPBF). However, many of its material properties are still not characterized. Monotonic torsion and low cycle torsional fatigue tests were performed on LPBF IN718 in order to determine its shear properties.
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The fatigue behavior of a Ni-based superalloy of grade GH4169 has been investigated at room temperature and high temperature (RT and HT) up to a very high cycle . Three different print orientations (horizontal, diagonal, vertical) and three separate heat treatments (none, AMS-5662, modified) were tested to determine their effects on the . A unique gradient-structured alloy is successfully synthesized by subjecting CuAl10Fe5Ni4Mn0.23 to high-frequency large torsional deformation. The results showed .high-temperature high-strength nickel-base alloys a practical guide to the use of nickel-containing alloys no 393 distributed by nickel institute produced by inco
A unique gradient-structured alloy is successfully synthesized by subjecting CuAl10Fe5Ni4Mn0.23 to high-frequency large torsional deformation. The results showed that the multi-level gradient structure due to high-frequency deformation significantly enhances the torsional strength of CuAl10Fe5Ni4Mn0.23 alloy. The high weldability and corrosion resistance of nickel alloy 718 (IN718) make it an ideal material for laser powder-bed fusion (LPBF). However, many of its material properties are still not characterized. Monotonic torsion and low cycle torsional fatigue tests were performed on LPBF IN718 in order to determine its shear properties.
Ultrasonic fatigue testing (UFT) is a recent fatigue methodology that applies resonance to achieve very high cyclic load frequencies. Its primary purpose is to study fatigue in the very high cycle fatigue regime. In this study, an UFT machine was used to conduct multiaxial tension/torsion fatigue tests at a 20-kHz frequency. Ultrasonic equipment is described which is used to perform cyclic torsion and cyclic tension–compression fatigue experiments with the aluminium alloy 2024-T351 in the high and very high cycle . The influence of grain refinement by high-pressure torsion (HPT) on the corrosion behavior of CoCrFeNi alloys with varied Cr content was investigated in aqueous 0.5 M H2SO4 and 3.5% NaCl solutions. The results were compared with CoCrFeMnNi alloys. Both the alloys showed a single fcc phase after vacuum melting and HPT. Protective passivation capability .
The microhardness and microstructural evolution during high pressure torsion testing in samples of pure nickel were investigated. Results were obtained on Ni samples subjected to annealing prior . In this work, the mechanical characteristics of high-entropy alloy Co 20 Cr 26 Fe 20 Mn 20 Ni 14 with low-stacking fault energy processed by cryogenic and room temperature high-pressure torsion .
In 2019 and 2021, they further explored VHCF issues with TC11 titanium alloy [33,34], with a test frequency of 100 Hz. In 2018, Wu et al. also used an electromagnetic resonance fatigue testing machine to study the effects of different stress ratios on the HCF properties of dual-phase Ti-10V-2Fe-3Al alloy. The test frequency was 110 Hz. Since 2004, high-entropy alloys (HEAs) have received increasing attentions in materials field due to their promising applications [1].The HEAs possess many excellent properties, such as high strength and ductility, outstanding fracture toughness, good corrosion, oxidation and thermal-softening resistances [2].Recently, gradient structures via torsional .High-Frequency Torsion Test: Conducted at higher frequencies, this test is used to understand the material’s response to rapid torsional changes, often relevant in vibration analysis. . Description: An aluminum alloy with good strength-to-weight ratio. Typical Shear Modulus: 26 .
high frequency cyclicloading due to for example vehicle vibrations, and the number of cycles to failure is in the . Yoshinobu [4] performed cyclic torsion fatigue test of a carburized alloy steel in very high cycle regime. They . C Si Mn P S Mo Ni Cr 1.03 0.24 0.339 0.012 0.008 0.032 0.147 1.46 E/GPa ρ/kg﹒m-3 R Many established, but also potential future applications of NiTi-based shape memory alloys (SMA) in biomedical devices and solid-state refrigeration require long fatigue life with 107–109 duty . Of great interest for the processing of amorphous alloys is the severe plastic deformation (SPD) process of high-pressure torsion (HPT) [11, 12].In this process, large plastic strains [11, 12] are implemented in the processed material under a high hydrostatic pressure preventing the fracture of a sample.It is especially important for brittle and hard-to-deform .
The torsional modal testing of cylindrical bodies still remains formidable. This is because pure torsional eigenfrequencies typically lying in the kilohertz frequency range are nearly impossible to excite by popular excitation methods. The present work studied the very high-cycle fatigue (VHCF) test and fatigue properties of TC17 titanium alloy. The specimens for bending vibration were designed using the finite element method and the VHCF tests were conducted by using the ultrasonic fatigue testing system. The results indicated that there is no the fatigue limit for TC17 titanium alloy, and the . It is pointed out that Ishii et al. [4] did not report applied loads and test frequency. Others research studies using ultrasonic fatigue machines (20 kHz) were done (none torsional cyclic loading) by Stanzl-Tschegg [10] who performed fatigue crack growth tests for two aluminum alloys (planar slip aluminum 2024-T3 and homogeneous slip 7075-O4 alloy) as well as for a . Ultrasonic equipment is described which is used to perform cyclic torsion and cyclic tension–compression fatigue experiments with the aluminium alloy 2024-T351 in the high and very high cycle fatigue regime. Displacement amplitude of one specimen’s end and cyclic resonance frequency are measured and controlled in closed-loop electronic circuits, and the .
Ultrasonic fatigue testing is an increasingly used method to study the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) properties of materials. Specimens are cycled at an ultrasonic frequency, which leads to a drastic reduction of testing times. This work focused on summarising the current understanding, based on literature data and original work, whether .
Shape memory materials have unique properties and have been described in terms of basic materials science [21], [22], [23] and applications [24], [25], [26] on many occasions in the literature. The functional properties of shape memory alloys clearly represent the reason for their success; but there are also many applications where structural properties are very important. The paper is devoted to the problem of fatigue failure of two-phase titanium alloy VT3-1 under the action of high-frequency cyclic loading. Samples for the tests were made from the compressor disk of aviation engine D30-Ku installed on Tupolev Tu-154 planes. Repeated alternating loading was carried out by displacements of small amplitude at 20 kHz, coinciding .
Torsion is an effective strengthening method to provide large strain dominated by shear deformation, and it can accumulate a higher plastic deformation than that by tension or compression deformation [[13], [14], [15]].Besides, torsion can reach the larger deformation without size reduction or strain localization [16].Research on the mechanical behavior and . The advantage of ultrasonic vibration–assisted milling of titanium alloys has been reported generally under low material removal rate. In this study, high-speed longitudinal-torsion ultrasonic vibration milling (LTUVM) of Ti-6Al-4V was adopted to investigate the cutting forces and tool wear in contrast to conventional milling (CM). In ultrasonic milling, the tool and the . Temperature dependent Young's modulus, shear modulus and the related internal frictions of Zr 41.2 Ti 13.8 Cu 12.5 Ni 10 Be 22.5 (Vit-1) bulk metallic glass (BMG) were measured by using the modified piezoelectric ultrasonic composite oscillator technique (M-PUCOT) at longitudinal and torsional resonance under several tens of kilohertz, respectively. An .
Very high cycle fatigue behaviors of GH4169 superalloy at room
Ultrasonic high-frequency fatigue testing differs from conventional low-frequency fatigue testing in strain rate and cyclic loading. Ultrasonic fatigue has a resonance frequency of 20,000 Hz and a . A very high cycle fatigue diagram and crack propagation behavior of carburized SCM420H are obtained using an ultrasonic torsional fatigue testing machine and are compared with those of non . Very high cycle tensile and torsional fatigue of TC17 titanium alloy with bimodal microstructure have been firstly and comparatively studied at the stress ratio of 0.1. Like the tensile cracks, torsional cracks were substantiated to nucleate from specimen surface or interior sites and presented in a fatigue life-dependent mode.
A deformation-induced phase transformation in a face-centered cubic (FCC) Co 20 Cr 26 Fe 20 Mn 20 Ni 14 high-entropy alloy during cryogenic high-pressure torsion (HPT) discovered in this work is reported. Thermodynamic calculations prove that in the Co 20 Cr 26 Fe 20 Mn 20 Ni 14 alloy, a hexagonal close-packed (HCP) phase is stable at low temperatures. .
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high frequency torsional testing of ni alloy|Very high cycle fatigue behaviors of GH4169 superalloy at room