Results 51 to 60 of about 63,045 (293)

Nonlinear ultrasonic characterization of γ΄ phase evolution in DZ411 alloy after long-term aging

Cailiao gongcheng
To explore the feasibility of the nonlinear ultrasonic method in the aging microstructure evolution application of directionally solidified nickel-based superalloy， DZ411 directionally solidified nickel-based superalloy is studied.The microstructure ...
YANG Gangzhengliang, LI Ping, CAO Tieshan, ZHAO Jie   +3 more
doaj   +1 more source

Properties of GH4169 Superalloy Characterized by Nonlinear Ultrasonic Waves

Advances in Materials Science and Engineering, 2015
The nonlinear wave motion equation is solved by the perturbation method. The nonlinear ultrasonic coefficients β and δ are related to the fundamental and harmonic amplitudes.
Hongjuan Yan, Chunguang Xu, Dingguo Xiao, Haichao Cai   +3 more
doaj   +1 more source

Evaluation of contact-type failure development using fluctuation of natural frequency caused by nonlinear wave modulation (Verification of estimation method of natural frequency fluctuation by time response analysis)

Nihon Kikai Gakkai ronbunshu, 2020
This research presents the evaluation method of contact-type failure level based on nonlinear wave modulation. It is difficult to detect contact-type failures using a linear ultrasonic inspection.
Takashi TANAKA, Yasunori OURA, Syuya MAEDA, Zhiqiang WU   +3 more
doaj   +1 more source

Nonlinear Ultrasonic Detection Method for Delamination Damage of Lined Anti-Corrosion Pipes Using PZT Transducers

Applied Sciences, 2018
Lined anti-corrosion pipes are widely used in oil and gas, petrochemical, pharmaceutical industries. However, defects, especially delamination, may occur in the production and service of pipes which result in safety accidents.
Xiaobin Hong, Yuan Liu, Xiaohui Lin, Zongqiang Luo, Zhenwei He   +4 more
doaj   +1 more source

Acoustical Ranging Techniques in Embedded Wireless Sensor Networked Devices [PDF]

, 2013
Location sensing provides endless opportunities for a wide range of applications in GPS-obstructed environments; where, typically, there is a need for higher degree of accuracy.
Jha, Sanjay, Kottege, Navinda, Kusy, Branislav, Misra, Prasant, Ostry, Diethelm   +4 more
core   +2 more sources

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

Advanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar, Akash Vyas, Mohammad Aatif Qazi, Nashit Jalal, Maria Ophelia Jarligo, Mostafa Yakout, Jing Liu, André McDonald   +7 more
wiley   +1 more source

Loss-based structures and frequency dependencies of giant magnetostrictive materials for rotary ultrasonic machining applications

Journal of Science: Advanced Materials and Devices, 2023
This paper investigates rotating magnetostrictive ultrasonic transducers (RMUT) with eddy current losses to enhance the stability requirements of high-power ultrasonic vibration processing in defense and military industries.
Yunshuai Chen, Pengyang Li, Jian Sun, Zhe Li, Guoqing Chen   +4 more
doaj   +1 more source

3D‐Printed Sulfur‐Derived Polymers With Controlled Architectures for Lithium‐Sulfur Batteries

Advanced Functional Materials, EarlyView.
Rheology‐guided formulation design for direct ink writing enables the fabrication of 3D sulfur copolymer cathodes with controlled architectures for lithium‐sulfur batteries. The printed electrodes exhibit multiscale porosity and high sulfur utilization, delivering enhanced electrochemical performance compared to conventional cast electrodes.
Bin Ling, Haoran Wang, Pan Yang, Rishav Agrawal, Alex R. Neale, Laurence J. Hardwick, Tom Hasell, Esther García‐Tuñón   +7 more
wiley   +1 more source

Nonlinear shear wave interaction at a frictional interface: Energy dissipation and generation of harmonics

, 2011
Analytical and numerical modelling of the nonlinear interaction of shear wave with a frictional interface is presented. The system studied is composed of two homogeneous and isotropic elastic solids, brought into frictional contact by remote normal ...
Meziane, A., Norris, A. N., Shuvalov, A. L.   +2 more
core   +1 more source