Results 41 to 50 of about 33,469 (308)

Study of ultrasonic vibration–assisted thread turning of Inconel 718 superalloy

Advances in Mechanical Engineering, 2019
With excellent properties, high-temperature superalloys have become the main application materials for aircraft engines, gas turbines, and many other devices. However, superalloys are typically difficult to machine, especially for the thread cutting.
Yu He, Zhongming Zhou, Ping Zou, Xiaogang Gao, Kornel F Ehmann   +4 more
doaj   +1 more source

Concurrent influences of tool offset and ultrasonic vibration on the joint quality and performance of dissimilar Al/Cu friction stir welds

Journal of Materials Research and Technology, 2021
Dissimilar joints made of aluminium alloy (Al) and copper (Cu) have great prospective applications in the electrical and electronic industries. Still, it is a challenging task to join them and obtain good performance.
Najib A. Muhammad, ChuanSong Wu, Hao Su
doaj   +1 more source

Effect of Ultrasonic Vibrations on Fluid Flow in a Channel. Turbulence Promotion by Ultrasonic Vibration.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 2000
The flow pattern by ultrasonic vibration in a square channel was investigated as basic research into fluid control without contact. A turbulence promoter by ultrasonic vibration was proposed in this experiment. An ultrasonic transducer was fixed to the bottom of a square test channel, and a standing wave field was formed in this channel. The ultrasonic
NOMURA, Shinfuku, MURAKAMI, Koichi, SASAKI, Yuichi, TOKUNAGA, Kenichi   +3 more
openaire   +2 more sources

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Improved microstructure and mechanical properties of sheet metals in ultrasonic vibration enhanced biaxial stretch forming [PDF]

, 2019
Ultrasonic energy is used for applying severe plastic deformation on metal surfaces. In the present work, the effect of ultrasonic vibration on the formability, microhardness and microstructural properties of St14 steel sheet has been investigated. To be
Nima Najafizadeh, Ramin Hashemi, Saeid Amini, Majid Rajabi   +3 more
core   +1 more source

Coupled effect of pulsed current and ultrasonic vibration on deformation behavior of Inconel 718 sheet: phenomena and modeling

Journal of Materials Research and Technology, 2023
Multi-energy fields provide higher dimensional precision control and desirable performance for microforming processes. The constitutive model under low strain level was established to describe the coupled effect of pulsed current and ultrasonic vibration
Jiangpeng Yan, Rui Zhao, Min Wan, Bao Meng   +3 more
doaj   +1 more source

Low‐Cost, Large‐Scale Nanoporous Metals by Mechanical Alloying, Oxide Reduction, and Dealloying of Powders

Advanced Engineering Materials, EarlyView.
Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley   +1 more source

Progressive wave: a new multisource vibration technique to assist forming processes - kinematic study, simulation results and design proposition [PDF]

, 2013
Use of vibration in the forming process has already shown numerous advantages in the improvement of mechanical and surface properties of workpiece such as good surface or less friction between die and workpiece.
NGUYEN, Thanh Hung, ABBA, Gabriel, KHAN, Armaghan, GIRAUD-AUDINE, Christophe, LEMAIRE-SEMAIL, Betty, BIGOT, Régis   +5 more
core  

A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection

Advanced Engineering Materials, EarlyView.
A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan, Shuvra Saha, Sumit Hassan Eshan, Rinku Basak, Md. Nahian Al Subri Ivan, Ahmed Murtuza Saleque, Raja Tariqul Hasan Tusher, Sadia Zabin, Md. Abdur Rahman, Yuen Hong Tsang   +9 more
wiley   +1 more source

Harmonic analysis of lossy piezoelectric composite transducers using the plane wave expansion method

, 2008
Periodic composite ultrasonic transducers oer many advantages but the periodic pillar architecture can give rise to unwanted modes of vibration which interfere with the piston like motion of the fundamental thickness mode.
Hayward, G., Hayward, Gordon, Mulholland, A.J., Mulholland, Anthony, Mulholland, Anthony J., Orr, Leigh-Ann, Orr, L., O'Leary, R.L., O'Leary, Richard L., O'Leary, Richard   +9 more
core   +1 more source