The Koch-Haaf reaction of adamantanols was successfully carried out in a microflow system at room temperature. By combining an acid-tolerant hastelloy-made micromixer, a PTFE tube, and a hastelloy-made microextraction unit, a packaged reaction-to-workup system was developed. By means of the present system, the multigram scale synthesis of 1-adamantanecarboxylic acid was achieved in ca. one hour...

Hastelloy C22 and Inconel 600 and 601 alloys specimens were cyclically deformed. Specimens were sectioned and investigated. Results indicated that the grain structure of Hastelloy C22 revealed planar slip bands, whereas Inconel 600 and 601 showed slip bands having triangular ribbon morphology. The triangular ribbon bands were more distinct in Inconel 601 than in Inconel 600.

AlN thin films were deposited on flexible Hastelloy tapes and Si (100) substrate by middle-frequency magnetron sputtering. A layer of Y₂O₃ films was used as a buffer layer for the Hastelloy tapes. A two-step deposition technique was used to prepare the AlN films. The effects of deposition parameters such as sputtering power, N₂/Ar flow rate and sputtering pressure on the microstructure of the A...

This paper presents the finite element analysis to study the stress distribution of nickel based superalloy HASTELLOY C-2000 in end milling operation. A commercial finite element software was used to develop modeling and analysis the distribution of stress components in the machined surface after end milling of HASTELLOY C-22HS using coated carbide tools. The friction interaction along the tool...

Total strain-controlled low-cycle-fatigue tests with and without hold times were performed at temperatures ranging from 816°C to 982°C in a laboratory air on a nickel-based superalloy, HASTELLOY X. The influence of hold times on the cyclicstress response and fatigue life was studied. At the temperatures considered, the alloy exhibited initial cyclic hardening, followed by a saturated cyclic-str...

The HASTELLOY® and HAYNES® alloys are known for their good weldability, which is defined as the ability of a material to be welded and to perform satisfactorily in the imposed service environment. The service performance of the welded component should be given the utmost importance when determining a suitable weld process or procedure. If proper welding techniques and procedures are followed, h...

The effects of cutting tool coating material and cutting speed on cutting forces and surface roughness were investigated by Taguchi experimental design. Main cutting force, Fz is considered as a criterion. The effects of machining parameters were investigated using Taguchi L18 orthogonal array. Optimal cutting conditions were determined using the signal-to-noise (S/N) ratio which is calculated ...