Results 51 to 60 of about 4,897 (207)

Index to 1984 NASA Tech Briefs, volume 9, numbers 1-4 [PDF]

, 1987
Short announcements of new technology derived from the R&D activities of NASA are presented. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage ...

core   +1 more source

Degradation Mechanisms in PEM Water Electrolysis: Diagnosis and Impact

Advanced Materials Technologies, EarlyView.
This review provides an analysis of degradation mechanisms in proton electrolyte membrane water electrolyzers (PEMWE), focusing on all key components. It discusses diagnostic and measurement techniques for evaluating degradation, less‐studied mechanisms, and an expert survey.
Annik Bernhardt, Katja Lange, Robert Göckeritz, Erik Grunwald, Angelika Hähnel, Alexander Müller, Volker Naumann, Sistan Rasuli, Wolfram Münchgesang, Bruno G. Pollet, Kerstin Witte‐Bodnar, Klemens Ilse   +11 more
wiley   +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 observations of melt degassing and hydrogen removal enhanced by ultrasonics in underwater wet welding

Materials & Design, 2020
In this study, the phenomenon of gas removal behaviors in the melt pool and the flow behaviors of melt pool were observed using an in-situ X-ray imaging method.
Hao Chen, Ning Guo, Kexin Xu, Changsheng Xu, Li Zhou, Guodong Wang   +5 more
doaj   +1 more source

3D Multiscale Characterization of Discontinuities in Underwater Wet Welds [PDF]

Microscopy and Microanalysis, 2015
article i nfo Underwater wet welding is performed in direct contact with other, with high cooling rates and gas metal reac- tions that lead to the formation of pores, cracks and inclusions in the weld metal. These discontinuities appear in a wide range of sizes, shapes and orientations, and require 3D techniques for complete characterization. Lab scale
S. Paciornik, L. F. Silva, V. R. dos Santos, N. Chawla, G. Schneider, T. Bernthaler   +5 more
openaire   +1 more source

Advanced Functional Materials for Marine Energy Utilization

Interdisciplinary Materials, EarlyView.
Marine renewable energy is an important future clean energy supply. We construct and sort out the material system for marine energy capture and conversion, transmission, storage, and utilization for the first time. ABSTRACT Several features of marine energy, including large reserves, sustainable utilization, environmental friendliness, make it a ...
Qiang Yu, Peipei Ge, Fazhou Wang, Shichao Bi, Bo Tang, Ion Tiginyanu, Kenneth I. Ozoemena, Xiao‐Yu Yang   +7 more
wiley   +1 more source

Comparative Analysis of Shielded Metal Arc Welding (SMAW) Beads in Dry and Wet Environments

Yanbu Journal of Engineering and Science
Shielded Metal Arc Welding (SMAW) is a versatile and reliable welding process widely used across various industries. The environment in which SMAW is performed can significantly impact the characteristics of the weld bead, influencing factors such as ...
Abdullah F. Alhuzaim
doaj   +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

Analyses of the Deformability and Chemistry of Non‐Metallic Inclusions in QT Steels With Increased Recycling‐Induced Tramp Element Content

steel research international, EarlyView.
This work uses high‐temperature dilatometry to examine how the tramp elements Cu, Ni, and Sn affect the deformability of non‐metallic inclusions and matrix in quench‐and‐temper steel. Mg‐bearing inclusions deform less than Mg‐free ones. Copper lowers formability. Nickel increases deformability.
Julian Cejka, Isabell Gruber, Gerald Klösch, Susanne Katharina Michelic   +3 more
wiley   +1 more source

Duplex Stainless Steel Laser‐Surface Textured: Stability in Brine Solution

Advanced Engineering Materials, Volume 28, Issue 8, 22 April 2026.
Controlled laser‐surface treatment (LST) of duplex DSS2205 steel is performed to increase its stability in brine solution under cyclic electrochemical assays. The superior protection with respect to flat and smooth panels is attributed to the presence of FeCr2O4 as the main protective oxide layer in the LST surface, after corrosion tests. The stability
Mohammad Rezayat, Hamidreza Enshaei, Elaine Armelin, José I. Iribarren, Antonio Mateo, Miguel Morales   +5 more
wiley   +1 more source