Results 1 to 10 of about 12,802 (205)

Enhancement of tribological behavior and microhardness of AISI H13 tool steel by electrochemical boriding [PDF]

Scientific Reports
Iron boride coatings were developed on AISI H13 hot work tool steel using the electrochemical boriding method at temperatures of 850, 950, and 1050 °C for durations of 2, 4, and 6 h. The process was conducted at a current density of 200 mA/cm2, utilizing
A. Mourad, A. A. Mahdy, E. S. Mosa, A. Kandil, M. A. Elhelaly   +4 more
doaj   +2 more sources

Effect of boriding time on the effective thermal diffusivity of the borided AISI 1018 steel [PDF]

Scientific Reports
Boriding is a thermochemical process by which the surface of metallic materials is strongly improved for many applications. When boriding is applied to ferrous alloys, a boride layer containing mainly a single-phase Fe $$_{2}$$ B or a double-phase Fe $$_{
Yesenia Sánchez-Fuentes, Luz Alejandra Linares-Duarte, José Abraham Balderas-López, José Guadalupe Miranda-Hernández, Raúl Tadeo-Rosas, Cintia Proa-Coronado, Enrique Hernández-Sánchez   +6 more
doaj   +2 more sources

Structures and formation mechanism of borides with varied morphologies in cast γ-TiAl alloys

Materials & Design, 2023
Borides with varied morphologies and structures obtained by changing B content in as-cast Ti-45Al-2Mn-2Nb alloys are investigated. With the increase of B content, morphologies of borides change from curved to straight, and flake shape, ribbon shape ...
Ruxin Cao, Renci Liu, Chao Yang, Yuyou Cui, Rui Yang   +4 more
doaj   +1 more source

Growth kinetics of the FeB/Fe2B boride layer on the surface of 4Cr5MoSiV1 steel: experiments and modelling

Journal of Materials Research and Technology, 2021
The boriding of 4Cr5MoSiV1 steel was performed in the temperature range of 860°C–980 °C to examine the influence of boriding conditions on the boride layers.
Ouyang Delai, Cui Xia, Lu Shiqiang
doaj   +1 more source

Effect of Fe2B boride orientation on abrasion wear resistance of Fe-B cast alloy [PDF]

China Foundry, 2017
The microstructures and abrasion wear resistance of directional solidification Fe-B alloy have been investigated using optical microscopy, X-ray diffraction, scanning electron microscopy and laser scanning microscopy.
Da-wei Yi, Jian-dong Xing, Han-guang Fu
doaj   +1 more source

Boride formation behaviour and their effect on tensile ductility in cast TiAl-based alloys

Materials & Design, 2020
Boron has been used to refine the microstructures in TiAl castings, such as low-pressure turbine (LPT) blades, to improve mechanical properties. However, boride precipitates with undesirable morphologies could reduce ductility and even entirely remove ...
Jing Li, Spencer Jeffs, Mark Whittaker, Nigel Martin   +3 more
doaj   +1 more source

Effects of carbon content on high-temperature mechanical and thermal fatigue properties of high-boron austenitic steels [PDF]

China Foundry, 2016
High-temperature mechanical properties of high-boron austenitic steels (HBASs) were studied at 850 °C using a dynamic thermal-mechanical simulation testing machine.
Xiang Chen, Zhi-sheng Wang, Yan-xiang Li
doaj   +1 more source

Redetermination of the crystal structure of yttrium chromium tetraboride, YCrB4, from single-crystal X-ray diffraction data

Acta Crystallographica Section E: Crystallographic Communications, 2023
The structural parameters of yttrium chromium tetraboride YCrB4 were refined based on single-crystal X-ray diffraction data. YCrB4 is orthorhombic, having a space group of type Pbam (No. 55) and with lattice parameters of a = 5.9425 (2), b = 11.4831 (4),
Makoto Tokuda, Kunio Yubuta, Toetsu Shishido, Kazumasa Sugiyama   +3 more
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Experimental and Numerical Study of Transient Liquid Phase Diffusion Bonded DZ40M Superalloys

Crystals, 2021
Transient liquid phase (TLP) diffusion bonding of DZ40M cobalt-based superalloy was carried out using a self-made NiCrCoWB intermediate layer. The typical microstructure of the joint was investigated.
Zhan Sun, Xi Chen, Lixia Zhang, Saisai Zhang, Jicai Feng   +4 more
doaj   +1 more source

Multi-phase (Zr,Ti,Cr)B2 solid solutions: Preparation, multi-scale microstructure, and local properties

Journal of Advanced Ceramics, 2023
Multi-phase ceramics based on ZrB2, TiB2 and doped with CrB2 and SiC were prepared by powder metallurgy and hot pressing to explore the possibility of obtaining multi-scale microstructures by super-saturation of complex (Zr,Ti,Cr)B2 solid solutions. Core–
Laura Silvestroni, Nicola Gilli, Alex Sangiorgi, Alessandro Corozzi, Suzana Filipović, Nina Obradović, Laia Ortiz-Membrado, Emilio Jiménez-Piqué, William G. Fahrenholtz   +8 more
doaj   +1 more source