Journal ArticleDOI
Creep deformation of metal—matrix composites☆
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TLDR
In this paper, various models of creep deformation of composite materials are reviewed and their predictions compared with available experimental data, and the value of analysing transient creep following stress changes to elucidate the creep mechanisms is discussed.About:
This article is published in Composites Science and Technology.The article was published on 1985-01-01. It has received 90 citations till now. The article focuses on the topics: Diffusion creep & Creep.read more
Citations
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Journal ArticleDOI
The physics and mechanics of fibre-reinforced brittle matrix composites
Anthony G. Evans,Frank W. Zok +1 more
TL;DR: In this paper, a review of the mechanical and structural performance of brittle matrix composites is presented, focusing on the stress/strain behaviour in tension and shear, the ultimate tensile strength and notch sensitivity, fatigue, stress corrosion and creep.
Journal ArticleDOI
Constitutive modeling of solid propellant materials with evolving microstructural damage
TL;DR: In this article, a general 3D nonlinear macroscopic constitutive law is proposed to model microstructural damage evolution upon straining through continuous void formation and growth, and the concept of back stress is used to improve the model performance in stress relaxation.
Journal ArticleDOI
A review of input data and modelling assumptions in longitudinal strength models for unidirectional fibre-reinforced composites
TL;DR: In this article, the authors present a review of the mechanics, chemistry and physics involved in tensile failure of unidirectional composites and highlight potential areas for improvement, which could catalyse the use of composites in structural applications.
Journal ArticleDOI
Creep models for metal matrix composites with long brittle fibers
Z.-Z. Du,Robert M. McMeeking +1 more
TL;DR: In this paper, the authors extended the work of McLean (1985) to include effects of fiber breaks and the consequential stress relaxation in the broken fibers, and calculated the creep strain and the creep rupture time when global load sharing occurs.
Journal ArticleDOI
Creep behavior of interfaces in fiber reinforced metal–matrix composites
J.V. Funn,Indranath Dutta +1 more
TL;DR: In this article, a fiber push-down approach was used to isolate the elevated temperature deformation behavior of interfaces in model single fiber composites, and the mechanism of sliding was inferred to be interface-diffusion-controlled diffusional creep with a threshold stress.
References
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Journal ArticleDOI
Particle-coarsening, σ0 and tertiary creep
B.F. Dyson,M. McLean +1 more
TL;DR: In this paper, it is shown that inelastic strain is a far more important parameter than time in determining the extent of acceleration of strain rate and that tertiary creep is produced by at least two competing strain-softening damage micromechanisms.
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Microstructural contributions to friction stress and recovery kinetics during creep of the nickel-base superalloy IN738LC
P.J. Henderson,M. McLean +1 more
TL;DR: In this article, the recovery kinetics and friction stress associated with high temperature creep of the directionally solidified nickel-based superalloy IN738LC have been determined by using a numerical method of analysis to extrapolate data from stress drop experiments.
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Creep behaviour of a Ni-Ni3Al-Cr3C2 eutectic composite
E Bullock,M. McLean,D.E Miles +2 more
TL;DR: In this paper, the creep behavior of a Ni-Ni3Al-Cr3C2 directionally solidified eutectic composite was investigated at 825 and 980°C and found to be sensitive to the scale of the microstructure, which is dependent on both the rate of solidification and on the temperature gradient.
Journal ArticleDOI
Friction stress measurements during creep of Nimonic 105
Abstract: With Nimonic 105, the dependence of the secondary creep rate es on stress σ and temperature T can be described ases = Aσn exp - Q c/RT with n ≃ 7 and Q c ≃ 515 kJ mol−1. Using a technique which involves making consecutive small stress reductions during creep, definitive values of the friction stress σ0 can be determined such that these large values of n and Q c can be rationalized ases = A*(σ-σ0)4 exp - Q c */RT where Q c *, derived from the temperature dependence of the creep rate at constant (σ-σ0), is equal to the activation energy for creep of single phase nickel–chromium alloys (∼ 310 kJ mol−1). This suggests that processes occurring in the matrix are rate-controlling during creep of nickel-base superalloys. Differences in the stress and temperature-dependence of creep resulting from variations in creep testing procedure are shown to be attributable to micro-structural instability. Furthermore, measurements of σ0 during conventional creep tests and during tests in which the specimens were sub...