Results 11 to 20 of about 11,150 (222)

Process Stability, Microstructure and Mechanical Properties of Underwater Submerged-Arc Welded Steel

open access: yesMetals, 2021
In underwater wet welding, the unstable welding process caused by the generation and rupture of bubbles and the chilling effect of water on the welding area result in low quality of welded joints, which makes it difficult to meet the practical ...
Maofu Zhang   +5 more
doaj   +1 more source

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement

open access: yesGeophysical Monograph Series, Page 27-82., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm   +2 more
wiley  

+1 more source

Welding tool oscillator for wet underwater welding apparatus

open access: yesТехнічні науки та технології, 2023
У статті розглянуто конструкцію механізму подачі порошкового дроту в автоматі для зварювання під водою мокрим способом з оригінальним пристроєм для коливання електродного дроту для забезпечення суцільного шва за наявності негарантованих по ширині зазорів в умовах просторового обмеження.
Volodymyr Lebedev, Serhii Loi
openaire   +3 more sources

Fatigue life of underwater wet welded low carbon steel SS400

open access: yesHeliyon, 2020
Underwater welding is widely used for maintenance and repairs of underwater structures such as undersea pipes, offshore structures and nuclear power plants.
N. Muhayat   +4 more
doaj   +1 more source

Improvement on Mechanical Properties of Submerged Friction Stir Joining of Dissimilar Tailor Welded Aluminum Blanks

open access: yesAdvances in Materials Science and Engineering, 2021
Friction stir welding is a solid-state welding method that produces joints with superior mechanical and metallurgical properties. However, the negative effects of the thermal cycle during welding dent the mechanical performance of the weld joint.
R. Suryanarayanan   +6 more
doaj   +1 more source

Study of particulate emissions when using special wires for underwater welding [PDF]

open access: yesE3S Web of Conferences
The article describes the study to evaluate the emissions to atmospheric air of airborne nano- and microparticles generated during underwater welding in seawater from Ajax Bay (Sea of Japan) using special wires and coated electrodes.
Chernousov Vladimir   +8 more
doaj   +1 more source

Effect of Water Flow on Underwater Wet Welded A36 Steel

open access: yesMetals, 2021
Underwater wet welding (UWW) combined with the shielded metal arc welding (SMAW) method has proven to be an effective way of permanently joining metals that can be performed in water. This research was conducted to determine the effect of water flow rate
Eko Surojo   +5 more
doaj   +1 more source

The Influence of Water Flow Characteristics on the Physical and Mechanical Qualities of Underwater Wet Welded A36 Marine Steel Plate

open access: yesMetals, 2022
Underwater welding has proven to be a successful method of joining two similar or dissimilar metals and takes place underwater. This technique is frequently used for maintenance purposes, such as repairing piping systems, ships, and other marine ...
Eko Surojo   +8 more
doaj   +1 more source

An optimal trajectory control strategy for underwater welding robot

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2018
The underwater welding robots are replacing humans in several harsh working environments however further strategies are required to achieve better control of robotic motion in order to extend their utility. This paper presents a smooth trajectory control
Lintao XIANG, Xiaopeng XIE, Xiaohui LU
doaj   +1 more source

Effect of the water depth on the hydrogen content in SMAW wet welded joints

open access: yesSN Applied Sciences, 2020
Hydrogen-induced cold cracking is a huge challenge in underwater wet welding. In the present study, the influence of water depth on the diffusible and residually stored hydrogen content is investigated for the case of underwater wet shielded metal arc ...
Jan Klett   +5 more
doaj   +1 more source

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