Journal ArticleDOI
Dislocation structure due to high temperature deformation in γ′ phase of a nickel-base superalloy
Dongliang Lin,Mao Wen +1 more
TLDR
In this paper, the dislocation structures of directionally solidified (DS) Rene 80 superalloy in γ′ phase during tensile deformation at 760°C and 850°C under a stress of 618MPa have been studied by transmission electron microscopy.About:
This article is published in Acta Metallurgica.The article was published on 1989-11-01. It has received 5 citations till now. The article focuses on the topics: Slip (materials science) & Dislocation.read more
Citations
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Book ChapterDOI
Chapter 63 Dislocations and high-temperature plastic deformation of superalloy single crystals
T.M. Pollock,R.D. Field +1 more
TL;DR: A wide variety of deformation phenomena occur in these constrained two-phase systems, and many aspects of the deformation are unique to the two phase materials, and not directly related to deformation mechanisms in their single-phase ordered or disordered counterparts as mentioned in this paper.
Journal ArticleDOI
Stacking fault formation in γ′ phase during monotonic deformation of IN738LC at elevated temperatures
TL;DR: In this article, the deformation behavior of IN738LC in two γ′ morphologies under monotonic loading at elevated temperatures has been studied and mechanisms of dislocation-γ′ precipitate interaction have been identified.
Journal ArticleDOI
High temperature creep and low cycle fatigue of a nickel-base superalloy
TL;DR: In this article, the authors investigated the creep and low cycle fatigue behavior of a nickel-base superalloy and found that the slow cyclic softening is consistent with the prolonged acceleration creep stage at 900°C.
Journal ArticleDOI
Dislocation network formation during creep in Ni-base superalloy GTD-111
TL;DR: In this article, microstructural evidence was provided by means of transmission electron microscopy for a high temperature bypassing mechanism operating in the superalloy GTD-111.
Journal ArticleDOI
Microstructure evolution and its influence on deformation mechanisms during high temperature creep of a nickel base superalloy
Javad Safari,Saeed Nategh +1 more
TL;DR: In this article, the interaction of dislocation with strengthening particles, including primary and secondary particles, during different stages of creep of Rene-80 was investigated by scanning electron microscopy (SEM) and TEM.
References
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Journal ArticleDOI
The mechanism of creep in gamma prime precipitation-hardened nickel-base alloys at intermediate temperatures
TL;DR: In this paper, it was shown that the deformation mode is a function of strain rate at 1400°F and tensile deformation occurs by the shear of the γ and γ′ phases bya/2 superlattice pairs.
Journal ArticleDOI
Dissociation and core structure of 〈110〉 screw dislocations in L12 ordered alloys I. Core structure in an unstressed crystal
TL;DR: In this article, the core structure of screw dislocations in ordered alloys with the L12 structure has been studied using computer simulation techniques, and the dislocations lying on both {111} arid {100} planes in stress-free crystals were studied using three different interatomic potentials corresponding to different antiphase boundary (ABP) and complex stacking fault (CSF) energies on { 111} planes.
Journal ArticleDOI
Dissociation and core structure of 〈110〉 screw dislocations in L12 ordered alloys II. Effects of an applied shear stress
TL;DR: In this paper, the effects of applied shear stress on screw dislocations in L12 ordered alloys have been studied by computer simulation techniques, and the results of these calculations suggest that there should be two classes of L12ordered alloys.
Journal ArticleDOI
Shearing of γ′ precipitates by single a/2 〈110〉 matrix dislocations in a γ/γ′ Ni-based superalloy
Marc Condat,Brigitte Décamps +1 more
TL;DR: In this paper, a processus de cisaillement des precipites γ' dans un alliage Ni-Al-Co-Cr-W-Ta-Mo-Ti soumis a un essai de fluage vers 750 C.
Journal ArticleDOI
The effect of strain rate on the flow stress and dislocation behavior of a precipitation-hardened nickel-base alloy
G.R Leverant,M Gell,S.W Hopkins +2 more
TL;DR: In this article, the relationship between strain rate, flow stress and deformation mode for single crystals of a precipitation-hardened nickel-base alloy has been investigated over the temperature range of 1400° to 1850° F and strain range 10 −1 to 6 × 10 3 %/min.