Journal ArticleDOI
Deformation mechanism for high temperature creep of a directionally solidified nickel-base superalloy
TLDR
In this article, the authors analyzed the relationship between the steady-state creep rate and the applied stress of DZ17G, a modern DS cast nickel-base superalloy used for producing turbine blades and vanes for aeroengine applications.About:
This article is published in Scripta Materialia.The article was published on 1998-09-04. It has received 37 citations till now. The article focuses on the topics: Diffusion creep & Superalloy.read more
Citations
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Journal ArticleDOI
Mesoscale cyclic crystal plasticity with dislocation substructures
TL;DR: In this paper, a physically-based formulation for the back stress based on the Eshelby inclusion formalism is introduced that explicitly depends on morphology of mesoscale dislocation structures.
Journal ArticleDOI
Cube slip and non-Schmid effects in single crystal Ni-base superalloys
TL;DR: In this paper, an advanced constitutive model incorporating two specific aspects of Ni-base superalloy deformation behavior is proposed, which can reasonably predict the material tensile response and creep behaviour for a range of temperatures and stress or strain rate levels.
Journal ArticleDOI
A multiscale model for the elastoviscoplastic behavior of Directionally Solidified alloys: Application to FE structural computations
TL;DR: In this paper, a mean field mechanical model describing the inelastic behavior and strong anisotropy of Directionally Solidified (DS) materials is developed and its material parameters are calibrated by comparison with the Finite Element (FE) computation of a Representative Volume Element (RVE).
Journal ArticleDOI
The creep deformation mechanisms of a newly designed nickel-base superalloy
TL;DR: In this article, the influence of applied stress and temperature on the creep deformation mechanisms of the newly developed nickel-base superalloy M951G have been studied and a creep mechanism map at various creep conditions was summarized and the theoretical critical resolved shear stresses of various creep mechanisms under different temperatures were also calculated.
Journal ArticleDOI
Stress dependence of the creep behaviors and mechanisms of a third-generation Ni-based single crystal superalloy
TL;DR: In this paper, the authors studied the creep behavior of Ni-based single crystal superalloy with a wide stress regime of 120-174 MPa and found that the dislocation climbing mechanism was the dominant creep mechanism.
References
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Journal ArticleDOI
Creep resistance of CMSX-3 nickel base superalloy single crystals
Tresa M. Pollock,A.S. Argon +1 more
TL;DR: In this paper, the authors studied the effect of dislocation-free nickel base superalloy single crystals with high volume fractions of the γ′ phase on their deformation and found that the dislocation free precipitates are resistant to shearing by dislocations.
Journal ArticleDOI
The measurement of internal stresses during creep of al and Al-Mg alloys
C.N Ahlquist,William D. Nix +1 more
TL;DR: In this paper, the average dislocation velocity depends linearly on the effective stress while the mobile dislocation density varies reciprocally with the internal stress, and the predicted recovery rate based on the measured internal stress dependence of the steady state creep rate agrees with Friedel's network growth model.
Journal ArticleDOI
Strengthening Mechanisms in γ′ Precipitating Alloys
D. Raynor,J. M. Silcock +1 more
TL;DR: In this paper, the mechanical properties of several austenitic steels containing γ′ precipitate have been studied and a large increase in proof stress occurs during ageing as a result of particle growth at almost co...
Journal ArticleDOI
Some new aspects concerning particle hardening mechanisms in γ' precipitating nickel-base alloys—II. Experiments
TL;DR: In this article, the authors examined the theoretical concept described in the preceding paper (part I) and examined the RT yield stress of the strengthened Nickel base alloys Nimonic PE 16 and Nimonic 105.
Related Papers (5)
A microstructural model for the monotonic and the cyclic mechanical behavior of single crystals of superalloys at high temperatures
Creep resistance of CMSX-3 nickel base superalloy single crystals
Tresa M. Pollock,A.S. Argon +1 more