Results 171 to 180 of about 2,090 (211)

Solidification morphologies in directionally solidified superalloys

Materials Science and Engineering, 1984
the microstructures of several nickel-base superalloys directionally solidified using a wide range of processing conditions have been examined. The conditions required for plane front solidification are compatible with the concepts of constitutional supercooling.
P.N. Quested, M. McLean
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Grain Structure Prediction for Directionally Solidified Superalloy Castings

JOM, 2020
A highly parallelized mesoscale solidification model based on a cellular automaton method was coupled with a macroscale process model to predict grain structure during directional solidification.
A. Durga, Huijuan Dai, Shenyan Huang, Ian Spinelli, Lang Yuan   +4 more
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Elastic Anisotropy of Directionally Solidified Superalloy

Journal of Engineering Materials and Technology, 1992
This paper describes the elastic compliance matrix and Young’s modulus of directionally solidified (DS) plates which are composed of five columnar grains. Threedimensional finite element method analyses (FEM), taking account of the anisotropy of a crystal, were made to determine the elastic compliance matrix of the DS plate.
Tadashi Hasebe, Masao Sakane, Masateru Ohnami   +2 more
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Castability of directionally solidified nickel base superalloys

Materials Science and Technology, 1999
AbstractGrain boundary cracking during directional solidification of columnar grained nickel base superalloys has been investigated. A quantitative test has been developed that allows a classification of the castability of directionally solidified nickel base superalloys: CM247LC showed excellent castability, while IN792 showed severe cracking.
K. Heck, R. Blackford, R.F. Singer
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Weld Cracking in Directionally Solidified Inconel 738 Superalloy

Canadian Metallurgical Quarterly, 2007
AbstractThe microstructure of a laser beam welded directionally solidified Inconel 738 (DS IN738) superalloy was studied. The alloy was welded along the longitudinal (the solidification direction) and the transverse (perpendicular to solidification) direction in two pre-weld heat treated conditions. The material suffered intergranular microfissuring in
R.K. Sidhu, O.A. Ojo, M.C. Chaturvedi
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Directionally Solidified and Single-Crystal Superalloys

1990
Abstract Directionally solidified (DS) and single-crystal (SX) superalloys and process technology are contributing to significant advances in turbine engine efficiency and durability. These gains are expected to arise from the development of higher creep strength and improved oxidation-resistant SX alloy compositions as well as from the ...
K. Harris, G.L. Erickson, R.E. Schwer
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Thermal cycling creep properties of a directionally solidified superalloy DZ125

Journal of Materials Science & Technology, 2022
Abstract Aero-engine turbine blades may suffer overheating during service, which can result in severe microstructural and mechanical degradation within tens of seconds. In this study, the thermal cycling creep under (950°C/15 min+1100°C/1 min)-100 MPa was performed on a directionally solidified superalloy, DZ125.
Wenrui An, Satoshi Utada, Xiaotong Guo, Stoichko Antonov, Weiwei Zheng, Jonathan Cormier, Qiang Feng   +6 more
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Directionally solidified Soviet superalloy, ZHS6-K

Journal of Materials Science, 1981
Directional solidification of the Soviet superalloy, ZHS6-K, has been carried out in an argon atmosphere. Tensile and stress-rupture properties have been measured for the investment cast and directionally solidified (DS) alloy. The DS alloy shows a several fold increase in rupture life and ductility compared with the investment cast alloy It also shows
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Recrystallization in a directionally solidified cobalt-base superalloy

Materials Science and Engineering: A, 2008
The recrystallization behavior in a range of annealing temperature from 1020 to 1280 degrees C in a directionally solidified cobalt-base superalloy was studied. Local recrystallization first appeared at 1040 degrees C. The recrystallized volume increased rapidly as increasing the annealing temperature. Pinning effect of all carbides (M23C6, M7C3 and MC)
S. Pu, J. Zhang, Y.F. Shen, L.H. Lou
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TMF of Directionally Solidified and Single Crystal Superalloy

Advanced Materials Research, 2011
Directional solidification and single crystal technology reduces material defects, improves material mechanical property and improves resistances to the high temperature fatigue, creep and corrosion. Accumulation of fatigue damage is a method of life prediction analysis and many fatigue damage models are proposed.
Qing Wu Wang, Shi Hui Zhang, Mao Pang
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