Results 51 to 60 of about 3,013 (183)

Spectroscopy of hot subdwarf binaries

Open Astronomy, 2018
We present a status report of our spectroscopic analysis of subdwarf binaries consisting of a subdwarf and a F/G/K-type main-sequence companion. These systems selected from SDSS photometry show significant excess in the (infra-)red which can not be ...
Kreuzer Simon, Irrgang Andreas, Heber Ulrich   +2 more
doaj   +1 more source

Effect of ECAP on the Microstructure and Mechanical Properties of a Rolled Mg-2Y-0.6Nd-0.6Zr Magnesium Alloy

Crystals, 2019
A fine-grained Mg-2Y-0.6Nd-0.6Zr alloy was processed by bar-rolling and equal-channel angular pressing (ECAP). The effect of ECAP on the microstructure and mechanical properties of rolled Mg-2Y-0.6Nd-0.6Zr alloy was investigated by optical microscopy ...
Xiaofang Shi, Wei Li, Weiwei Hu, Yun Tan, Zhenglai Zhang, Liang Tian   +5 more
doaj   +1 more source

DEVELOPMENT OF MICROSTRUCTURE, MECHANICAL AND WEAR CHARACTERISTICS OF THE BRASS ALLOY PROCESSED BY ECAP

Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ
In the present study, the microstructure, mechanical and wear characteristics of commercial Cu-30Zn brass alloy were developed by an equal channel-angular process (ECAP) using a particular die in constant dimensions.
Mohsin T. Mohammed, Hussein N. Radhia, Alaa M.H. Aljassani   +2 more
doaj   +1 more source

Strain Rate Contribution due to Dynamic Recovery of Ultrafine-Grained Cu–Zr as Evidenced by Load Reductions during Quasi-Stationary Deformation at 0.5 T_m

Metals, 2019
During quasi-stationary tensile deformation of ultrafine-grained Cu-0.2 mass%Zr at 673 K and a deformation rate of about 10−4 s−1 load changes were performed.
Wolfgang Blum, Jiři Dvořák, Petr Král, Philip Eisenlohr, Vaclav Sklenička   +4 more
doaj   +1 more source

NanoSteels (The Newest Approaches Toward the Training and Applications of Nanotechnology in Mass Production of Nanostructure Steels) [PDF]

Fanāvarī-i āmūzish, 2010
The term NanoSteels is called to some special steels consisting of nanosize phases (i.e. ferrite, cementite, and austenite), grains, and carbides (e.g. vanadium and M2C) produced by nanotechnology.
Sh. Ahmadi, H.R. Shahverdi, A. Shokouhfar   +2 more
doaj   +1 more source

Comparative analysis of tax regimes Effectiveness in oil Production

Учёт. Анализ. Аудит, 2022
The paper deals with the problems of the method of comparative analysis of the tax regimes in the field of oil production in order to create instruments for making operational decisions on its basis by oil and gas companies.
G. S. Dyachkov
doaj   +1 more source

Bioresorbable Scaffolds for Coronary Arteries: Where Do We Stand Today?

VIEW Medicine, Volume 1, Issue 1, August 2026.
Bioresorbable coronary scaffolds are moving from thick strut pitfalls to thinner, stronger, healing‐oriented designs. Integrating advances in materials, guided implantation with preparation, size, and postdilation steps, and resorption aligned to healing, we synthesize clinical evidence and chart a roadmap toward intelligent, transient platforms ...
Junya Matsuda, Tatsuya Watanabe, Satoshi Yuhara, John M. Kelly, Hirotsugu Kurobe, Toshiharu Shinoka   +5 more
wiley   +1 more source

Effect of Aging Process on Microstructure Evolution and Mechanical Properties of UFG Zn-22Al Alloy [PDF]

Iranian Journal of Materials Science and Engineering, 2023
Microstructure evolution and mechanical properties of Zn-22Al alloy after post-ECAP natural/artificial aging were investigated. A homogenization treatment was applied to the casting samples.
Bahram Azad, Ali Reza Eivani, Mohammad Taghi Salehi   +2 more
doaj  

Influence of Alkaline Earth Barium on the Microstructure, Corrosion Behavior, and Cytocompatibility of Biodegradable Zinc

Rare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Biodegradable Zn‐based alloys are promising candidates for temporary implants, yet excessive Zn2+ release during degradation may induce cytotoxicity and adverse tissue responses. In this study, Zn‐xBa alloys (x = 0.1 wt%, 0.5 wt%, 1.0 wt% and 3.0 wt%) were developed to achieve controlled corrosion behaviors with improved biocompatibility.
Liu‐Dang Fang, Meng‐Meng Mao, He Huang, Zhi‐Pei Tong, Qian‐Ying Jia, Qing‐Gong Jia, Jin Xiao, Shao‐Kang Guan, Dong Bian, Yu‐Feng Zheng   +9 more
wiley   +1 more source

A uniformly fine-grained Mg-Y-Nd-Zr magnesium alloy with simultaneously optimized strength and ductility processed by forging and ECAP

Materials Research Express, 2020
In this work, as-cast rare earth Mg-2Y-0.6Nd-0.5Zr alloy was successfully processed by forging at 350 °C and different numbers of passes of equal channel angular pressing (ECAP) along the Bc route.
Yidan Sun, Wei Li, Xiaofang Shi, Liang Tian   +3 more
doaj   +1 more source