Low temperature gaseous nitriding and carburising of stainless steel Tập 21 Số 5-6 - Trang 445-455 - 2005
Thomas L. Christiansen, Marcel A.J. Somers
The response of various austenitic and duplex stainless steel grades to low temperature gaseous nitriding and carburising was investigated. Gaseous nitriding was performed in ammonia/hydrogen mixtures at temperatures <723 K; gaseous carburising was carried out in carbon monoxide/hydrogen mixtures for temperatures ≤783 K. The case developed by thermochemical treatment was examined using...... hiện toàn bộ
Research status of magnesium alloys by micro-arc oxidation: a review Tập 33 Số 10 - Trang 731-738 - 2017
Jinhe Dou, Yang Chen, Huijun Yu, Chuanzhong Chen
Magnesium and its alloys are fascinating candidates for biodegradable implants due to their suitable mechanical properties, biodegradability and biocompatibility. However, the rapid corrosion rate, generation of a large amount of hydrogen gas and increase in local pH of the body fluid limit their potential biomedical applications. Various techniques, including alloying, mechanical process...... hiện toàn bộ
FEM Simulation of Two Sided Laser Shock Peening of Thin Sections of Ti-6Al-4V Alloy Tập 19 Số 2 - Trang 127-133 - 2003
Kan Ding
Laser shock peening (LSP) is a fatigue enhancement surface treatment for metallic materials. The key beneficial characteristic of LSP is the presence of compressive residual stresses mechanically produced by shock waves within the metallic materials, which can significantly improve their fatigue life and fatigue strength. During LSP, a laser beam can be directed to impact on either one si...... hiện toàn bộ
Rake and Flank Wear Mechanisms of Coated Cemented Carbides Tập 1 Số 1 - Trang 43-58 - 1985
P. A. Dearnley
A series of commercially available cemented carbides coated with single or composite layers of TiC, TiN, and Al2O3 were used to cut three types of steel, En 8 (080M40), En9 (070M55), and En24 (817M40). For comparison, two uncoated cemented carbides and some Al2O3-ceramic inserts were also tested. The worn ...... hiện toàn bộ
Diffusion model for growth of Fe2B layer in pure iron Tập 27 Số 3 - Trang 189-195 - 2011
I. Campos-Silva, Martín Ortiz Domínguez, Hüseyin Çi̇menoǧlu, R. Escobar Galindo, М. Кеддам, M. Elías-Espinosa, Noé López Perrusquia
A simple diffusion model is proposed to estimate the growth kinetics of Fe2B layers created at the surface of pure iron. This model employs the mass balance equation at the Fe2B/substrate interface to evaluate the boron diffusion coefficient ( DFe2 B) in the boride layer. The Fe... hiện toàn bộ
Performance evaluation of HVOF sprayed WC-10Co4Cr coatings under slurry erosion Tập 35 Số 9 - Trang 816-825 - 2019
Xiaobin Liu, Jiajie Kang, Wen Yue, Zhiqiang Fu, Lina Zhu, Dingshun She, Jian Liang, Peng Wang
Slurry erosion is one of the main failure modes of the hydraulic turbine parts, mud pumps and drill pipes. The high velocity oxygen fuel (HVOF) spray process has been widely used for depositing protective coatings especially the cermet coatings that can significantly improve the slurry erosion resistance of substrate materials. In this work, conventional WC-10Co4Cr composite coatings and ...... hiện toàn bộ
Nitriding of Stainless Steelin Ammonia: I Phase Distribution and Microstructure Tập 1 Số 2 - Trang 114-124 - 1985
B. Billon, A. Hendry
The compound layer of iron nitrides (white layer) and the diffusion layer formed during the nitriding of an austenitic stainless steel have been investigated by a combination of optical and electron microscopy and X-ray powder diffraction. The mechanical behaviour of the nitrided surface is controlled by the microstructure, which is shown to be dictated by the nitriding temperature and co...... hiện toàn bộ
LASER Melt-Particle Injection Processing Tập 1 Số 4 - Trang 263-272 - 1985
Khershed P. Cooper, J. D. Ayers
In situ metal matrix-ceramic composite layers on metal surfaces were formed by injecting metal carbide particles into laser melted pools. Injected layers up to 2 mm thick and containing up to 60 vol.-% carbides were produced. Injected surfaces exhibited high hardness, up to × 2·6 that of the base metal and erosion wear resistance of up to × 38 that of the base metal. Reasonable control of...... hiện toàn bộ
Plasma Nitriding of Stainless Steel using Continuous and Pulsed RF Glow Discharge Tập 4 Số 2 - Trang 150-154 - 1988
F.M. El-Hossary, Fadhil Muhi Mohammed, A. Hendry, D.J. Fabian, Z. Szaszne-Csih
A novel radio frequency (rf) plasma technique for nitriding engineering steels is described whichproduces a surface layer of exceptional hardness in extremely short nitriding times. The sample does not form part of the primary electrical circuit, as is the case, with de plasma methods, and the temperature at the metal surface is controlled by a variable pulsed mode operation of the induct...... hiện toàn bộ
Electroplating of Pt–Ni–Cu nanoparticles on glassy carbon electrode for glucose electro-oxidation process Tập 35 Số 2 - Trang 128-134 - 2019
Abolfath Eshghi, Mehdi Kheirmand
Platinum and nickel–copper nanoparticles were electrodeposited on glassy carbon electrode (GCE) by using cyclic voltammetry (CV)-based electroplating technique. Morphology and chemical composition of the newly designed electrode was studied via scanning electron microscope, energy dispersive X-ray and elemental mapping analysis. This electrode was eventually employed to electro-oxidation ...... hiện toàn bộ