Results 21 to 30 of about 34,109 (257)

Investigation of welded joints of long-term operated gas pipeline controllable rolled X70 steel [PDF]

FME Transactions, 2023
The complex properties (mechanical, microstructure, and electrochemical) of controllable rolling X70 steel pipes of the main gas pipeline with a diameter of 1420 mm after an operation for 20 years and emergency reserve pipe after a similar period of ...
Nyrkova Lyudmila I., Goncharenko Larysa V., Rybakov Anatoly O., Osadchuk Svetlana O., Klymenko Anatoly V., Kharchenko Yulia O.   +5 more
doaj  

Mechanical Properties, Thermal Stability and Microstructures of W-Re-ZrC Alloys Fabricated by Spark Plasma Sintering

Metals, 2020
Tungsten materials, used as friction stir welding tools, undergo severe plastic deformation and even collapse at high operating temperatures. In order to improve the low-temperature toughness and high-temperature strength, W-10wt.%Re-0.5wt.%ZrC alloys ...
Shu Miao, Zhuoming Xie, Yan Lin, Qianfeng Fang, Jinhong Tan, Yunqiang Zhao   +5 more
doaj   +1 more source

Carbon nanoparticle-entrapped macroporous Mn3O4 microsphere anodes with improved cycling stability for Li-ion batteries

Scientific Reports, 2022
Manganese oxide (Mn3O4) has garnered substantial attention as a low-cost, environment-friendly anode material. It undergoes a conversion reaction involving the formation of Li2O and metallic Mn to provide high-energy Li-ion batteries.
Takahiro Kozawa, Fumiya Kitabayashi, Kayo Fukuyama, Makio Naito   +3 more
doaj   +1 more source

Comparison of Microstructure and Mechanical Properties of Induction and Vacuume Brazed Joint of Titanium Via Copper and Ag-Cu Eutectic Filler Metal / Mikrostruktura I Właściwości Mechaniczne Połączeń Tytanu Lutowanych Indukcyjnie I Próżniowo Z Użyciem Spoiwa Miedzianego I Eutektycznego Ag-Cu

Archives of Metallurgy and Materials, 2015
This study presents the basic physico-chemical properties and describes the brazeability of titanium. The work contains the results of macro and microscopic metallographic examination as well as the results of strength-related tests of vacuum and ...
Różański M., Majewski D., Krasnowski K.   +2 more
doaj   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Flat hardness distribution in AA6061 joints by linear friction welding

Scientific Reports, 2021
It is known that one of the main concerns associated with the conventional welding of precipitation-strengthened Al alloys is the formation of softening regions, resulting in the deterioration of mechanical properties.
Jeong-Won Choi, Weihao Li, Kohsaku Ushioda, Hidetoshi Fujii   +3 more
doaj   +1 more source

Dissimilar joining of carbon steel, pure nickel and aluminum alloys by center-driven double-sided linear friction welding

Journal of Advanced Joining Processes, 2023
In this study, a center-driven double-sided linear friction welding (LFW) process was employed to join three dissimilar materials: A7075-T6, S45C, and pure Ni.
Tetsuro Ito, Masayoshi Kamai, Takuya Miura, Yoshiaki Morisada, Hidetoshi Fujii   +4 more
doaj   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

Mathematical Model for Charpy Impact Energy of V-Notch Specimens

Advances in Materials Science and Engineering, 2021
Firstly, by analyzing the response of Charpy V-notch specimen impacted by pendulum, the relationship between specimen geometry, material properties, and impact energy is established and simplified, and the mathematical model for evaluating impact energy ...
Wei Wang, Ping Wang, Xuesong Liu, Zhibo Dong, Hongyuan Fang   +4 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source