The effects of ausforming in an Fe30Mn10Cr10Co high-entropy alloy on the microstructure, hardness, and plastic anisotropy were investigated. showed a dual-phase microstructure consisting face-centered cubic (FCC) austenite hexagonal close-packed (HCP) martensite as-solution-treated condition, finish temperature for reverse transformation was below 200 °C. Therefore, low-temperature at °C achiev...

Plastic ionic molecular crystals are a novel class of materials that have attracted recent interest due to the discovery ferroelectric and piezoelectric properties together with an orientationally disordered mesophase high plasticity. Despite growing interest, little is known about mechanisms underpin their properties. To address this knowledge gap, we use density functional theory calculations...

Tuning anisotropy in bulk metallic glasses, ideally isotropic, is of practical interest optimizing properties and fundamental understanding the amorphous structure its instability. By employing quasi-elastic asymmetric mechanical cycling method, we effectively induce polarity a model glass, without damaging sample or introducing significant annealing rejuvenation effects. Moreover, polarized an...

a semi-micromechanical multilaminate model is introduced here to predict the mechanical behavior of soils. this model is like a bridge between micro and macro scale upon the satisfaction of minimum potential energy level during any applied stress/strain increments. the concept of this model is based on a certain number of sampling planes which constitute the elastic-plastic behavior of the soil...

An attempt is made to summarize the different ways of modelling the anisotropy of a polycrystalline material. At the single crystal level, the formulation based on Schmid law or viscoplasticity shows clearly the microscopic anisotropy due to the hardening and the orientation changes. It is also shown how viscoplasticity leads to a unique slip system activity irrespectively of the rate sensitivi...

Rolling is one of the most employed industrial processes which can be used at multiple manufacturing stages, allowing different geometries such as plates, rods, profiles, billets, slabs, tubes, and seamless tubes to obtained. However, rolled products develop anisotropy due preferential orientation crystals in rolling direction. Thus, some process configurations processing parameters (e.g., thic...

Plastic constitutive relations are derived for a class of anisotropic porous materials consisting of coaxial spheroidal voids, arbitrarily oriented relative to the embedding orthotropic matrix. The derivations are based on nonlinear homogenization, limit analysis and micromechanics. A variational principle is formulated for the yield criterion of the effective medium and specialized to a sphero...

Abstract. In an ongoing quest to realize lighter vehicles with improved fuel efficiency, deformation characteristics of the material AA 6016 is investigated. In the first part of this study, material behavior of Al–Mg–Si sheet alloy is investigated under different process (temperature and strain rate) and loading (uniaxial and biaxial) conditions experimentally. Later, warm cylindrical cup deep...

A simple constitutive model for the inelastic response of steel under monotonic and random cyclic loading conditions is developed within the framework of bounding surface plasticity. The particular feature that distinguishes this model from other similar ones is the ability of the bounding surface formulation to describe in a very simple way the initial “plateau” type of perfectly plastic respo...

The role of cellulose microfibril orientation in determining cell wall mechanical anisotropy and in the control of the wall plastic versus elastic properties was studied in the adaxial epidermis of onion bulb scales using the constant-load (creep) test. The mean or net cellulose orientation in the outer periclinal wall of the epidermis was parallel to the long axis of the cells. In vitro cell w...