Journal ArticleDOI
The effect of size of Cu precipitation on the mechanical properties of microalloyed steel
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In this paper, the effect of size of nanoscale Cu precipitate on the mechanical response of micro-alloyed steel was investigated computationally and experimentally; a phenomenological constitutive description was adopted to build the computational crystal model.Abstract:
The effect of size of nanoscale Cu precipitate on the mechanical response of microalloyed steel was investigated computationally and experimentally. A phenomenological constitutive description is adopted to build the computational crystal model. The material is envisaged as a composite; the Cu precipitate is modeled as a monocrystalline core surrounded with a lower yield stress and higher work hardening rate response. Both a quasi-isotropic and crystal plasticity approaches are used to simulate the matrix. The nanoscale precipitate is modeled as ellipsoidal inclusion with different Yound's modulus to matrix. Elastic and plastic anisotropy are incorporated into this simulation. An implicit Lagrangian finite element formulation with von Mises plasticity or rate dependent crystal plasticity is used to study the nonuniform deformation and localized plastic flow. The computational predictions are compared with the experimentally determined mechanical response of HSLA-100 steel with average size of nanoscale precipitates of 2.02±1.89 nm. The tendency of the calculated yield strength attributed to Cu precipitates is in good agreement with experimental result.read more
Citations
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Control of precipitation morphology in the novel HSLA steel
TL;DR: In this article, the authors examined 20 thin foils of the specimens with or without deformed austenite with transmission electron microscopy and revealed both interphase precipitation and random precipitation in the ferrite for each experimental condition.
Journal ArticleDOI
Austenite stability and mechanical properties of a low-alloyed ECAPed TRIP-aided steel
TL;DR: In this article, equal channel angular pressing (ECAP) and post-ECAP heat treatment were conducted on a Fe-1.38Mn-0.67Si- 0.18C transformation-induced plasticity (TRIP) aided steel.
Journal ArticleDOI
Influence of Cu precipitation on tensile properties of Fe–Cu–Ni ternary alloy at different temperatures by molecular dynamics simulation
TL;DR: In this paper, the influence of Cu precipitation on the tensile properties of Fe-1.1% Cu-0.9% Ni ternary alloy at different temperatures were analyzed using molecular dynamics (MD) method.
Journal ArticleDOI
Effects of cerium addition on microstructures and mechanical properties of CoCrNi medium entropy alloy films
TL;DR: In this article, the effects of rare earth element Ce addition on the microstructures and mechanical properties of (CoCrNi)100-xCex (x = 0, 1.05, 2.61, 4.2, 5.96) medium entropy alloy films (MEAFs) were investigated.
Journal ArticleDOI
Influence of Ni on Cu precipitation in Fe—Cu—Ni ternary alloy by an atomic study
Zhu Lu-Shan,Zhao Shi-Jin +1 more
TL;DR: In this article, the early aging Cu precipitations in Fe-3%Cu and Fe- 3%Cu-4%Ni ternary alloys are investigated by molecular dynamics simulations.
References
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C.S. Pande,K.P. Cooper +1 more
TL;DR: Masumura et al. as discussed by the authors reviewed the mechanical properties of nanocrystalline materials, with emphasis on the fundamental physical mechanisms involved in determining yield stress, and paid particular attention to the abnormal or "inverse" Hall-Petch relationship.
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Journal ArticleDOI
Multi-scale micromorphic theory for hierarchical materials
TL;DR: In this paper, a multi-scale continuum theory is proposed so that kinematic variables representing the deformation at various scales are incorporated, and a constitutive relation is then introduced to preserve the underlying physics associated with each scale.
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Structure, energetics, and mechanical stability of Fe-Cu bcc alloys from first-principles calculations
TL;DR: In this article, a generalization of the cluster expansion technique was introduced to handle tensorial quantities in high-symmetry phases, and atomic volumes, magnetic moments, mixing energies, and the elastic properties of bcc Fe1-xCux solid solutions were studied by ab initio calculations based on the Cluster Expansion framework.
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A micromorphic model for the multiple scale failure of heterogeneous materials
TL;DR: Vernerey et al. as mentioned in this paper developed a three-scale constitutive model to represent the failure of a steel alloy from nucleation, growth and coalescence of voids from each population of particles.