Results 91 to 100 of about 1,228 (212)

Microstructural and mechanical evolution of a high-entropy superalloy during friction stir welding and post-weld heat treatment

Materials & Design
The effects of pre-weld and post-weld heat treatment on the microstructure and mechanical properties of friction stir welded Al0.2Co1.5CrFeNi1.5Ti0.3 high-entropy superalloy were investigated.
Kiyoaki T. Suzuki, Poying Hsieh, Shun Tokita, Yutaka S. Sato, Tzu-Yang Chiang, Chewei Tsai   +5 more
doaj   +1 more source

Electropulse‐Driven Dislocation Evolution in Sub‐10 nm Metallic Nanocrystals

Advanced Science, EarlyView.
Atomic‐scale TEM imaging reveals how nanosecond electropulses drive dislocation evolution in sub‐10 nm metallic nanocrystals. Enhanced electron scattering at structural heterogeneities nucleates dislocation loops and dipoles, which then repeatedly interact and annihilate, causing dislocation density fluctuations or structural disordering.
Youran Hong, Xiaoyu Zhai, Xing Li, Xinfang Zhang, Kexing Song, Ze Zhang, Jiangwei Wang   +6 more
wiley   +1 more source

Safety of Sodium‐Ion Batteries: Evaluation and Perspective from Component Materials to Cells, Modules, and Packs

Advanced Energy Materials, EarlyView.
This review provides a bottom‐up evaluation of sodium‐ion battery safety, linking material degradation mechanisms, cell engineering parameters, and module/pack assembly. It emphasizes that understanding intrinsic material stability and establishing coordinated engineering control across hierarchical levels are vital for preventing degradation coupling ...
Won‐Gwang Lim, Seoa Kim, Erik A. Wu, Darren H. S. Tan, Shawn Peng, Xiaolin Li   +5 more
wiley   +1 more source

On‐Demand Deconstructable Thermosets Through Cleavable Comonomer and Thermolatent Base Synergy

Angewandte Chemie, EarlyView.
Thermosets, valued for their chemical and mechanical properties, resist recycling due to their cross‐linked structure. Weak bonds via comonomers enable degradability, but diffusion limits effectiveness. We incorporate thermolatent bases before polymerization (thermal or 3D‐VAT printing).
Sophia Kouider, Loic Buchon, Luna Choulot, Paul Greuet, Julie Bratasanu, Patrick Désirée, Jessica Mauriello, Elsa Maarek, Jean‐Louis Clément, Laurence Charles, Emmanuelle Gastaldi, Damien Montarnal, Olivier Soppera, Didier Gigmes, Catherine Lefay, Yohann Guillaneuf   +15 more
wiley   +2 more sources

Weld formation control at electron beam welding with beam oscillations

Вестник Сибирского государственного аэрокосмического университета им. академика М.Ф. Решетнева, 2014
Electron beam welding is used extensively to produce essential machine parts. The control of the basic beam parameters beam power or beam current at constant accelerating voltage, welding speed, current of focusing lens and distance between electron gun and welded sample surface is not enough to obtain at most of the regimes sound welds. Control of the
Trushnikov, Dmitriy, Koleva, Elena, Mladenov, Georgy, Shcherbakov, A.   +3 more
openaire   +1 more source

Impact of Welding Current on Weld Formation in Variable Polarity Plasma Arc Welding: A Numerical and Experimental Analysis

Materials
The characteristics of a variable polarity plasma arc (VPPA) and the keyhole behavior significantly influence weld formation. This study investigates the impact mechanism of welding current on weld formation by examining both arc thermal-force output and keyhole behavior through a combination of numerical analysis and experimental methods.
Lang, Ruiqing, Han, Yongquan, Ma, Yonglin   +2 more
openaire   +2 more sources

Upscaling Sodium‐Ion Battery Cells: From Aqueous Processing to Performance Assessment of Hard Carbon|Prussian White Pouch Cells

Advanced Energy Materials, EarlyView.
This study investigates the feasibility of scaling up Prussian White (PW)‐based cathode manufacturing at a pilot scale. Through careful PW dehydration combined with optimized aqueous processing, we report the stepwise development of industrially relevant 1 Ah pouch cells and evaluate their performance under various conditions.
Faduma M. Maddar, Katerina Gonos, Martand Singh, Jacob Compton, Daniel Atkinson, Matthew J. Capener, Mark Copley, Ivana Hasa   +7 more
wiley   +1 more source

Phase transformation and flow simulation of weld pools at the crack tips of elbows under pulsed current

You-qi chuyun
ObjectiveIn the base metal repair for elbows using pulsed currents, detour flow typically occurs at the crack tips, resulting in the formation of weld pools due to local temperature increases.
Si ZHANG, Mingjiang ZHOU, Yuheng LIANG, Biwei FU   +3 more
doaj   +1 more source

Cycling Performance of Sodium‐Metal Chloride Battery Cells and Modules Based on Iron and Zinc

Advanced Energy Materials, EarlyView.
High‐utilization sodium–metal chloride cells with a mixed‐metal Fe, Zn, NaCl cathode enable efficient high‐temperature cycling (300°C) while reducing cost and environmental impact. Near‐theoretical capacity and high efficiency are achieved in single cells.
William Nash, Enea Svaluto‐Ferro, Robert Zboray, Fabrizio Vagliani, Diego Basso, Alberto Turconi, Andrea Pozzi, Corsin Battaglia, Norbert Weber, Tom Weier, Meike V. F. Heinz   +10 more
wiley   +1 more source

Atomic‐Layer‐Deposited ZnF2 on Aluminum Enabling In Situ NaF/Na–Zn Interphase for Robust Anode‐Free Sodium Batteries

Advanced Energy Materials, EarlyView.
“Sodiation of an ultrathin ALD‐ZnF2 layer on an Al current collector generates a sodiophilic Na–Zn alloy and a NaF‐rich SEI, enabling uniform Na deposition and highly reversible anode‐free sodium batteries.” ABSTRACT Achieving high‐energy‐density “anode‐free” sodium batteries remains a daunting challenge due to rapid capacity decay caused by poor ...
Viet Phuong Nguyen, Angelina Sarapulova, Michael Günthel, Markus Knäbbeler‐Buß, Changin Kim, Young‐Woon Byeon, Moonwon Lee, Kanghoon Yim, Eric Tröster, Sonia Dsoke, Seung‐Mo Lee   +10 more
wiley   +1 more source