Results 161 to 170 of about 621 (208)

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
openaire   +1 more source

An Abnormal Increase of Fatigue Life with Dwell Time during Creep-Fatigue Deformation for Directionally Solidified Ni-Based Superalloy DZ445

High Temperature Materials and Processes, 2018
The paper investigated the creep-fatigue behavior for directionally solidified nickel-based superalloy DZ445 at 900 °C. It is found that the fatigue life shows an abnormal increase when the dwell time exceeds a critical value during creep-fatigue ...
Biao Ding, Weili Ren, Kang Deng
exaly   +2 more sources

An Anisotropic Constitutive Model for a Directionally Solidified Superalloy

Key Engineering Materials, 2007
The monotonic tensile and creep deformations of a directionally solidified (DS) superalloy are investigated for several loading directions. The material exhibits remarkable anisotropy under elastic and creep loading conditions, whereas it shows isotropy under loading conditions of high strain rates.
Masatsugu Yaguchi, Masato Yamamoto, Takashi Ogata, Nobutada Ohno   +3 more
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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
openaire   +1 more source

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 ...
K. Harris, G.L. Erickson, R.E. Schwer
openaire   +1 more source

Creep-rupture behavior of a directionally solidified nickel-base superalloy

Metallurgical and Materials Transactions A, 2001
The creep-rupture behavior of the directionally solidified (DS) nickel-base superalloy DZ17G has been investigated over a wide stress range of 60 to 950 MPa at high temperature (923 to 1323 K). In this article, the detailed creep deformation and fracture mechanisms at constant load have been studied.
Guo JT, Yuan C, Yang HC, Lupinc V, Maldini M   +4 more
openaire   +3 more sources

THE RECRYSTALLIZATION OF Ni BASE DIRECTIONALLY SOLIDIFIED SUPERALLOY DZ417G

ACTA METALLURGICA SINICA, 2010
Large quantities of VIDP400 vacuum furnace smelting DZ417G oriented superalloys smelting process has been researched, analysis of the main factors affecting the organizational uniformity and stability, as well as the impact of high temperature tensile and lasting properties has been studied.
Sheng PENG, Lanzhang ZHOU, Jieshan HOU, Jianting GUO   +3 more
openaire   +2 more sources

CYCLIC DEFORMATION OF A DIRECTIONALLY SOLIDIFIED COBALT‐BASE SUPERALLOY

Fatigue & Fracture of Engineering Materials & Structures, 1998
An investigation has been carried out on the cyclic deformation and changes in microstructure of a directionally solidified cobalt‐base superalloy. The tests are conducted at 700 °C and 850 °C in air under different total strain amplitudes. The alloy tested at 700 °C exhibits an initial hardening, a short saturation stage and an evident secondary ...
null Zheng, null Lu, null Yongbo, null Zhuangqi   +3 more
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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
openaire   +1 more source

Creep behavior of a directionally solidified nickel based superalloy

Strength, Fracture and Complexity: An International Journal, 2006
Directionally solidified nickel-base superalloys provide significant improvements relative to the limitations inherent to equiaxed materials in the areas of creep resistance, oxidation, and low and high cycle fatigue resistance. The objectives of this study are to perform critical experiments and investigate the high temperature creep deformation ...
Alejandro R. Ibañez, Ashok Saxena, JiDong Kang   +2 more
openaire   +1 more source