Results 41 to 50 of about 45,254 (277)

Investigation of arc stability, microstructure evolution and corrosion resistance in underwater wet FCAW of duplex stainless steel

Journal of Materials Research and Technology, 2021
Underwater wet flux-cored arc welding (FCAW) process was used to join 2205 duplex stainless steel using Ni-based filler under three different heat inputs of 16.9 kJ/cm, 23.5 kJ/cm and 32 kJ/cm.
Qiang Ma, Chuncheng Luo, Shixiong Liu, Hongliang Li, Pengfei Wang, Duo Liu, Yucheng Lei   +6 more
doaj   +1 more source

Intelligent Control Mechanism for Underwater Wet Welding [PDF]

International Journal of Mechanical Engineering and Applications, 2015
It is important to achieve high quality weld in underwater welding as it is vital to the integrity of the structures used in the offshore environment. Due to the difficulty in ensuring sound welds as it relates to the weld bead geometry, it is important to have a robust control mechanism that can meet this need.
Wu Huapeng, Omajene Joshua, Kah Paul
openaire   +1 more source

The influence of the mineralogical composition of waterproof varnish layer of rutile electrodes on porosity in underwater wet welding

Revista Facultad de Ingeniería Universidad de Antioquia, 2013
Waterproof varnish coated rutile electrodes are used frequently in the underwater wet welding because of their good technological behavior. An alternative to improve its behavior would be to incorporate chemical compounds to the waterproof varnish layer.
Alexandre Queiroz, Ezequiel Caires-Pereira, Lorenzo Perdomo, Rafael Quintana   +3 more
doaj   +1 more source

Evaluation of Arc Signals, Microstructure and Mechanical Properties in Ultrasonic-Frequency Pulse Underwater Wet Welding Process with Q345 Steel

Metals, 2022
The ultrasonic-frequency pulse underwater wet welding (UFP-UWW) process was achieved through a constant-voltage-mode power source connecting an ultrasonic-frequency pulse power source in parallel.
Shixiong Liu, Hao Ji, Wei Zhao, Chengyu Hu, Jibo Wang, Hongliang Li, Jianfeng Wang, Yucheng Lei   +7 more
doaj   +1 more source

Effect of welding parameters on the corrosion behavior of underwater wet welds with new oxyrutile WW70 and commercial rutile E6013 electrode

Journal of Materials Research and Technology
In this work, the corrosion resistance of underwater wet welds produced with the new oxyrutile electrode Wet Weld 70 (WW70) was investigated, under different welding currents and depths in DCEP, and compared with the commercial rutile electrode E6013 ...
P. Cisquini, E.J.S. Lobo, A.M. Moreno-Uribe, E.C.P. Pessoa, A.Q. Bracarense, V.F.C. Lins   +5 more
doaj   +1 more source

Dynamic control of current and voltage waveforms and droplet transfer for ultrasonic-wave-assisted underwater wet welding

Materials & Design, 2019
Ultrasonic vibration can change the dynamic behavior of the bubble and improve the process stability in underwater wet welding (UWW); thus, it has been attempted to profitably control metal transfer process.
Jianfeng Wang, Qingjie Sun, Shaojun Hou, Tao Zhang, Peng Jin, Jicai Feng   +5 more
doaj   +1 more source

Investigation of Process Stability and Weld Quality of Underwater Wet Flux-Cored Arc Welding of Low-Alloy High-Strength Steel with Oxy-Rutile Wire

Polish Maritime Research, 2021
The paper described the experimental findings of underwater wet welding of E40 steel using self-shielded flux-cored wire with a TiO2-FeO-MnO slag system.
Li Hongliang, Liu Shixiong, Ma Qiang, Wang Pengfei, Liu Duo, Zhu Qiang   +5 more
doaj   +1 more source

Underwater Wet Repair Welding of API 5L X65M Pipeline Steel

Polish Maritime Research, 2017
This paper presents results of the research of effect of polymer insulation of pipeline made of API 5L X65M steel as well as underwater wet welding parameters on properties of joints made by covered electrodes.
Rogalski Grzegorz, Fydrych Dariusz, Łabanowski Jerzy   +2 more
doaj   +1 more source

In situ X-ray imaging of melt pool dynamics in underwater arc welding

Materials & Design, 2019
The dynamic behavior of the underwater melt pool was firstly in-situ observed with the X-ray transmission method. A method for quantitatively characterizing the melt pool stability was pioneered.
Changsheng Xu, Ning Guo, Xin Zhang, Haiyue Jiang, Hao Chen, Jicai Feng   +5 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