Results 71 to 80 of about 74,722 (267)

An assessment of the effect of surface topography on coefficient of friction for lubricated non-conformal contacts

Frontiers in Mechanical Engineering
Determining an accurate state of lubrication is of utmost importance for the precise functionality of machine elements and to achieve elongated life and durability.
Deepak K. Prajapati, Jonny Hansen, Marcus Björling   +2 more
doaj   +1 more source

External and Internal Cracking Caused by Heat Treatment in Laser Powder Bed Fusion‐Fabricated Inconel 738LC Components

Advanced Engineering Materials, EarlyView.
Manufacturing problems such as heat treatment‐induced cracking hinder the widespread application of the laser powder bed fusion (LPBF) process to superalloys. In this study, cracks in the LPBF components of Inconel 738LC superalloy are characterized after heat treatment at various temperature ranges, revealing two distinct cracking behaviors.
Kosuke Kuwabara, Masahiro Kusano, Ayako Ikeda, Toshio Osada, Makoto Watanabe   +4 more
wiley   +1 more source

PMSM Sensorless Direct Torque Control System with Improved STSMO

Journal of Harbin University of Science and Technology
In order to improve the observation accuracy of the rotor position of the sliding mode observer and suppress the frequent chattering, a double-filtered direct torque (DTC) control method based on the Super-Twisting sliding mode observer (STSMO) was ...
LÜ Degang, JI Tanglong, JIANG Gouwei
doaj   +1 more source

High‐Temperature Phase Transformation in a V‐9Si‐6.5B Alloy: The Kinetic and Crystallographic Pathway From V5SiB2 to V8SiB4

Advanced Engineering Materials, EarlyView.
In situ synchrotron high‐energy X‐ray diffraction reveals the real‐time high‐temperature phase evolution of a ternary V‐9Si‐6.5B alloy. The study uncovers a kinetically delayed V5SiB2 → V8SiB4 transformation governed by massive structural and chemical barriers.
Zahra Sabeti, Andreas Stark, Roja Rani Korrayi, Florian Pyczak, Georg Hasemann   +4 more
wiley   +1 more source

Enhancing Fatigue Crack Growth Resistance in Heterostructured Aluminum Bimetals by Tailored Interface Design

Advanced Engineering Materials, EarlyView.
Different Al/Al bimetals with a single engineered interface reveal how mechanical mismatch governs fatigue crack growth under cyclic loading. Additionally, loading–unloading–reloading tests link the microyielding behavior to the fatigue crack growth resistance, while crack‐path analysis reveals toughening mechanisms at the interface, highlighting ...
Sebastian Vollath, Philip Manuel Pohl, Heinz Werner Höppel   +2 more
wiley   +1 more source

Attracting investments through crowdfunding platforms as a method for agro-industrial enterprises to enter the international market

Вестник университета
Since agriculture is an important sector of the Russian economy, the problem of lack of capital in this sector is still relevant. The article shows that in the era of digital technologies, new sources of fundraising are emerging in the agro-industrial ...
E. V. Nagovitsyna, D. S. Tusin
doaj   +1 more source

The Influence of Field‐Assisted Sintering Technology (FAST) Temperature and Cooling Rate on the Microstructural Evolution in Gamma‐Titanium Aluminide Alloy GE4822

Advanced Engineering Materials, EarlyView.
Controlling the Field Assisted Sintering Technology (FAST) parameters, dwell temperature and cooling rate, significantly influences the microstructural evolution in titanium aluminide GE4822. Significant γ‐lamellar colonies develop only upon cooling through the α‐transus.
Jack Krohn, James Pepper, Martin Jackson
wiley   +1 more source

THEORETICAL ANALYSIS OF ENERGY PROCESSES IN MUTUAL LOAD ELECTRIC TRACTION DC MACHINES

Nauka ta progres transportu, 2008
The analysis of power streams in the schemes of mutual loading of hauling electric machines of direct and pulsating current is presented.
A. M. Afanasov
doaj  

Investigation of a Novel Mechanical to Thermal Energy Converter Based on the Inverse Problem of Electric Machines

Energies, 2016
A novel converter that can directly transform electrical, wind, hydraulic and other types of mechanical energy into thermal energy is presented in this study.
Lei Chen, Yulong Pei, Feng Chai, Shukang Cheng   +3 more
doaj   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source