Results 41 to 50 of about 101,475 (206)

Cooling of Duplex Stainless‐Steel Bars With Different Water and Air Impinging Jet Flow Rates

Engineering Reports, Volume 7, Issue 4, April 2025.
This study investigates the cooling behavior of super duplex stainless steel bars using water and air impinging jet quenching technique (IJQT) of various flow rates. The findings highlight the critical role of cooling rate in controlling sigma‐phase formation and impact toughness, demonstrating the effectiveness of the IJQT in industrial applications ...
Pavel Romanov, Getiye Gebeyaw, Arvid Jahedi, Rasmus Kristensen, Bahram Moshfegh, Viktor Norman, Ru Lin Peng, Mattias Calmunger   +7 more
wiley   +1 more source

Comparative Fatigue Analysis of Structural Steels Considering Welding and Surface Effects

Strain, Volume 61, Issue 2, April 2025.
ABSTRACT There are limited data on the very high‐cycle fatigue for structural steel welds for over 10 million cycles. The purpose of this research is a fatigue performance comparison of the welds made of steels S355JR+AR and S275JR+AR. The goal of reaching the gigacycle fatigue domain is achieved using the ultrasonic fatigue testing at 20 kHz.
Yevgen Gorash, Tugrul Comlekci, Carl Walker, Athanasios Toumpis, James Kelly, Andrew England, Lewis Milne   +6 more
wiley   +1 more source

Electrohydraulic effect of microsecond pulsed discharge in transformer oils

High Voltage, Volume 10, Issue 1, Page 137-145, February 2025.
Abstract The physical process of microsecond pulsed discharge in transformer oil is the foundation for studying the initial mechanics of faults in ultra‐high voltage transformers. However, the microsecond‐scale electrohydraulic effect in transformer oil has not been investigated yet.
Hang Wang, Cheng Zhang, Zhuofei Wang, Shuai Zhang, Kaihang Guo, Tao Shao   +5 more
wiley   +1 more source

Modeling of arcs with binary gas mixtures in a multi‐arc plasma generator Lichtbogenmodellierung in einem Multielektroden‐Plasmagenerator mit binären Gasgemischen

Materialwissenschaft und Werkstofftechnik, Volume 56, Issue 1, Page 77-87, January 2025.
This study investigates the impact of binary gas mixtures in multi‐arc plasma generator using numerical simulations. The addition of hydrogen and nitrogen increases voltage and power, which is consistent with experimental data. The maximum temperature of the cathodes occurred at the edge rather than the tip, and the use of hydrogen in the gas mixture ...
K. Bobzin, H. Heinemann, M. Erck, S. Warkentin, O. Mokrov, R. Sharma, U. Reisgen, K. Jasutyn   +7 more
wiley   +1 more source

A Point Cloud-Based Method for Automatic Groove Detection and Trajectory Generation of Robotic Arc Welding Tasks [PDF]

arXiv, 2020
In this paper, in order to pursue high-efficiency robotic arc welding tasks, we propose a method based on point cloud acquired by an RGB-D sensor. The method consists of two parts: welding groove detection and 3D welding trajectory generation. The actual welding scene could be displayed in 3D point cloud format. Focusing on the geometric feature of the
arxiv  

Plasma‐flash sintering: Metastable phase stabilization and evidence of ionized species

Journal of the American Ceramic Society, Volume 108, Issue 1, January 2025.
Abstract The first demonstration of plasma‐flash sintering (PFS) is presented in this work. PFS is performed under a low‐pressure atmosphere that consecutively generates plasma and flash events. It is shown, by using several combined characterization techniques, that PFS stabilizes metastable phases on the surface of the material, which may be ...
Eva Gil‐González, Ahmed Taibi, Antonio Perejón, Pedro E. Sánchez‐Jiménez, Luis A. Pérez‐Maqueda   +4 more
wiley   +1 more source

Residual stress evaluation in API 5L X65 girth welded pipes joined by friction welding and gas tungsten arc welding

Journal of Materials Research and Technology, 2019
The present study compared the residual stress states in friction welded pipes of API 5L X65 to those achieved by gas tungsten arc welding (GTAW). X-ray diffraction (XRD) was used to assess residual stresses.
Carlos Alexandre Pereira de Moraes, Mariane Chludzinski, Rafael Menezes Nunes, Guilherme Vieira Braga Lemos, Afonso Reguly   +4 more
doaj  

Microstructural and Mechanical Characterization of Dissimilar Metal Welding of Inconel 625 and AISI 316L

Metals, 2018
This study investigated the microstructure of the dissimilar metal welding of Inconel 625 and AISI 316L using Continuous Current Gas Tungsten Arc Welding (CCGTAW) and Pulsed Current Gas Tungsten Arc Welding (PCGTAW) processes with ERNiCr-3, TIG 316L and ...
Fatih Dokme, Mustafa Kemal Kulekci, Ugur Esme   +2 more
doaj   +1 more source

Low‐Cycle Fatigue Performance of Directed Energy Deposited and Conventionally Manufactured Hybrid Gas Tungsten Arc‐Welded Duplex Stainless Steel Joints

Advanced Engineering Materials, Volume 26, Issue 23, December 2024.
The present work reveals novel results on the mircrostructure evolution and in particular the structural integrity of gas tungsten arc‐welded joints of directed energy deposition arc and as‐rolled standard duplex stainless steels compared to counterparts of the nonwelded base material as well as similar weldments of as‐rolled sheets.
Thomas Wegener, Robert Prowaznik, Thomas Niendorf, Johannes Günther   +3 more
wiley   +1 more source

Influence of central ventilation on the formation of narrow gap TIG welds

Hanjie xuebao
In response to the problem of poor side wall fusion of narrow gap tungsten inert gas(TIG) , this article adopts the method of tungsten electrode center ventilation to expand the welding arc and transfer the arc heat to the groove side wall to ensure ...
Wanghui XU, Xinghua JIA, Rongze ZHAO, Chen YU, Chunfu GUO, Chen YANG   +5 more
doaj   +1 more source