A highly deformable Mg-Zn-Nd-Y-Zr alloy was investigated in terms of anisotropic and temperature-dependent mechanical behavior, with an emphasis on the microstructural changes. Uniaxial tension tests were conducted along the rolling (RD) and transverse (TD) directions at room temperature (298 K) and at 498 K, during which a series of ex-situ EBSD scans were obtained. In addition to quantitative texture

This study presents, for the first time, a model capable of simulating the complex interactions among deformation, phase transformation, and hydrogen (H) diffusion in H-charged transformation-induced plasticity (TRIP)-assisted steel. The model integrates a crystal plasticity (CP) framework with a deformation-induced martensitic transformation (DIMT) model and a H diffusion model while incorporating

The short-process fabrication of high-performance magnesium alloys holds great promise for aerospace and automotive applications, driving advancements in high-end manufacturing. In this study, tungsten inert gas (TIG)-protected wire arc additive manufacturing (WAAM) was employed to produce AZ91D Mg alloy with a weakly textured, equiaxed grain structure. The resulting alloy exhibits an ultimate tensile

This study presents a fully integrated model combing non-local crystal plasticity finite element method (CPFEM) and probabilistic cellular automata (CA) to capture the coupled effect of heterogeneous deformation, morphological evolution and mechanical responses during dynamic recrystallization (DRX). The developed model incorporates a non-local methodology that accounts for geometrically necessary

An Enhanced Strain Gradient Crystal Plasticity (Enhanced-SGCP) theory, based on the quadratic energy contribution of the Nye tensor, is developed within a thermodynamically consistent framework to accurately capture shear band formation in terms of slip and kink bands within the microstructure. The higher-order modulus in the theory is intrinsically linked to the evolving microstructural properties

Accurately predicting anisotropic damage evolution in crystalline metals remains a challenging topic due to the multiscale nature of fracture. Microstructures play a critical role in influencing crack deflection at the macroscale. To study the relations among anisotropic deformation, crack initiation and propagation, an anisotropic phase-field crystal plasticity model has been developed for nickel-based

Directed energy deposition (DED) offers higher manufacturing efficiency and material utilization, making it suitable for producing large-sized structural components. However, due to columnar coarse grains and manufactured defects, how to remarkably elevate the fatigue resistance of DED-fabricated face-centered cubic (FCC) materials is an important yet technically challenging issue. To address the challenge

Complex concentrated alloys (CCAs), also known as medium/high entropy alloys (M/HEAs), possess a multitude of outstanding properties attributing to their distinctive chemically disordered structure, which endows them with broad application prospects in many engineering fields. As a fundamental and ubiquitous non-equilibrium phenomenon, shear localization has received significant attention during past

As many nations commit to achieving Net Zero, many low carbon scenarios indicate that civil nuclear power generation and the economics thereof are set to play a vital role. To maximise nuclear reactor operation lifetimes, it is essential to develop mechanistic understanding of failure and degradation mechanisms in safety-critical components for increasingly holistic reactor design codes and standards

In order to achieve process stability in the industrial thermoforming of fiber reinforced polymers (FRPs), typically, cost- and time-intensive trial-and-error-processes are required. The experimental boundary conditions, as well as the material composition and component design optimization, are highly dependent on material phenomena related to various material scales and constituents. It is therefore

Additive manufacturing (AM) of high-entropy alloys (HEAs) typically results in the formation of unique microstructures and deformation mechanisms, sparking widespread research interest. This study delves into the deformation behavior and strengthening mechanisms of an AMed HEA with hierarchical heterostructures. The results show that the alloy consists of the FCC matrix, coherent L12 precipitates,

As one of the most important plastic deformation mechanisms of high-entropy alloys, deformation twinning can increase the strength without losing plasticity. Nevertheless, recent studies have shown that high-density twins can form "soft spots" and promote the occurrence of shear localization failure at high strain rates. The extent to which deformation twins contribute to the formation of shear localization

Refractory high-entropy alloys (RHEAs) exhibit excellent anti-irradiation properties, making them promising candidates for application in advanced nuclear reactors. In this study, molecular statics (MS) and molecular dynamics (MD) simulations are conducted to investigate the local unstable stacking fault energy (USFE) in RHEAs induced by primary knock-on atoms (PKAs) of displacement cascades. Based

A new plasticity-induced internal length mean field model (ILMF) is developed, based on statistical analyses of geometrically necessary dislocation (GND) densities and total dislocation densities estimated from EBSD and nanoindentation data, respectively. It is applied to a single phase ferritic Al-killed steel, which plastically deforms with the occurrence of heterogeneous intra-granular fields. During

The limited use of additively manufactured Ti-6Al-4V (AM Ti64) alloy in critical load–bearing applications stems from an incomplete understanding of its fatigue behavior, the underlying causes and mechanisms, and the absence of reliable predictive modeling. This study aims to bridge this gap by attempting to aid a microstructure–sensitive modeling with the number of cycles to failure. Low cycle fatigue

Mechanical constitutive relationships characterize the strain response of materials under external loading, laying the foundation for optimizing material performance and guiding engineering design. However, existing modeling methods for mechanical constitutive relationships, especially for high strain rate (HSR) loading, often rely on fitted experimental data and fail to comprehensively capture the

In recent years, there has been progress in the development of constitutive models for reproducing the mechanical properties of glassy polymers, but there are limitations to conventional models, such as increased complexity and the number of material parameters. In this study, a new model was proposed to describe the nonlinear viscoelastic-viscoplastic behavior under loading, unloading, and cyclic

The cross-scale rheology of amorphous systems raises a number of problems in the fields of materials science and soft condensed matter physics about their fundamental physical principles. Nevertheless, a clear and concise theoretical framework is still lacking to elucidate the process from microscopic plastic events to the coalescence of shear transformation zones, and subsequently from mesoscopic

The accumulation of geometrically necessary dislocations (GND) at grain boundaries is a primary source of long-range internal stress (LRIS) in polycrystals. The distribution of GNDs is typically inhomogeneous, and certain dislocation substructures with concentrated GNDs introduce a strong non-local effect. While many studies have explored the relationship between LRIS and the density of GNDs in polycrystals

The creep behavior of 316 L stainless steel at room temperature was evaluated as a function of time and applied stress using a new high-throughput approach. Several common creep models were evaluated against the observations, leading to deeper analysis of a stress-dependent modified logarithmic creep model. Within this model, multiple sources of uncertainty were compared. Aleatoric stochastic variation

A continuum damage mechanics (CDM) creep model was developed based on the microstructure, which could precisely delineate the evolution of mobile dislocations, dipole dislocations, boundary dislocations, and martensitic laths in the RAFM steel during creep process. The addition of Ta/Zr elements promoted the precipitation of MX carbide particles, which could pin the mobile dislocations, and restrain

This study systematically investigates the deformation mechanism and strengthening effects of the CoCrFeNiMn0.75Cu0.25 high-entropy alloy (HEA) under dynamic tensile loading across a wide temperature range (93 K to 1073 K). The HEA exhibits a ∼30 % enhancement in strength and ductility at 93 K relative to its performance at 298 K. These superior properties result from the synergistic interactions among

This study investigates size effect in nickel-titanium (NiTi) shape memory alloys (SMAs), focusing on their elastic deformation and phase transformation behaviors. A series of experiments, including bulk-scale tension tests, micro-scale tension, compression, and cantilever bending tests, were conducted to observe the effect of specimen dimensions on SMA behavior. Micro-scale tension and compression

We investigate the heterogeneity of the stress state driven by anisotropic deformation response at the single crystal level through five statistical volume element (SVE) calculations of polycrystalline BCC tantalum. This work focuses on grain boundaries as a prominent material defect type prone to void nucleation based upon experimental observations of predominantly intergranular void nucleation in

The pursuit of alloys that integrate high strength and substantial plasticity persists across various industries. Nevertheless, alloys engineered for elevated strength commonly manifest unsustainable work hardening, ultimately leading to a decline in plasticity. Dual- or even multi-phase systems offer vast potential for novel microstructural engineering aimed at harmonizing these inversely related

A study of the partitioning of external power into stress power, stored defect energy, thermal energy, and inertia during dynamic void growth is presented. An alternative form for a classical thick-walled sphere governing equation stemming from a local power balance including energetic cost of free surface creation is proposed. The importance of proper energy accounting in the context of dynamic ductile

This study systematically investigates the effects of different annealing treatments before identical aging on precipitation and mechanical properties of an L12-strengthened Fe-rich medium-entropy alloy (Fe-MEA) fabricated by laser powder bed fusion (L-PBF). These treatments result in distinct final microstructures characterized by either discontinuous precipitation (DP) or continuous precipitation