نتایج جستجو برای: rene 80 nickel base superalloy
تعداد نتایج: 493997 فیلتر نتایج به سال:
Joining of Hastelloy C276 nickel-base superalloy to AISI316 Stainless Steel using BNi-2 interlayer performed by transient liquid phase process (TLP) at 1150°C for 5 and 30 minutes. Bonding microstructure was studied using an Optical microscope and a scanning electron microscope (SEM). Vickers hardness test and shear strength test have been used to evaluate the mechanical properties. Microstruct...
Models have been developed and used as tools to design a new `made to measure’ nickel base superalloy for power plant applications. In Part 1 Gaussian processes were used to model the mechanical properties of superalloys, and have been used as a basis for the design of a new Ni ± Cr ± W ± Al ± Ti ± Fe ± Si ± C ± B superalloy with desirable properties. In this part, an attempt has been made to d...
A system for ultrasonic fatigue testing at temperatures as high as 700 C and at positive mean stresses has been developed. Its use is demonstrated by examining the fatigue behavior in the lifetime range of 10 to 10 cycles for the nickel-base superalloy Rene' 88 DT at 20 and 593 C for a load-ratio of 0.05. Crack initiation occurred from large grains and from inclusions, consistent with crack ini...
Convective instabilities responsible for misoriented grains (freckle defects) in directionally solidified turbine airfoils are produced by variations in liquid–metal density with composition and temperature across the solidification zone. Here, fundamental properties of molten Ni-based alloys, required for modeling these instabilities, are calculated using ab initio molecular dynamics simulatio...
Friction stir welding (FSW) of titanium alloy was carried out using liquid cooling the FSW tool made heat-resistant nickel superalloy. Cooling superalloy performed by means circulating water inside tool. The joints were characterized microstructures and mechanical strength. strength higher than that base metal.
Coherency elastic strain between γ and is one of the effective factors which affect the morphology, spatial re-arrangement and coarsening kinetics of precipitates in nickel-base superalloys. In this investigation, using X-ray diffraction (XRD) technique, the - constrained and unconstrained lattice misfits were calculated for different morphologies of the precipitates in Inconel 738L...
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