Related references
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Review
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Summary: Strain engineering is a promising method to manipulate the properties of 2D materials, such as electrical, electrochemical, magnetic, and optical properties, with the goal of achieving high-performance 2D-material-based devices. This review summarizes recent experimental and theoretical advancements in the field of strain engineering for 2D materials. It highlights novel methods to induce strain and discusses the tunable electrical and optical/optoelectronic properties of 2D materials achieved through strain engineering, including the less-explored strain tuning of superconducting, magnetic, and electrochemical properties. Furthermore, the review presents future perspectives on the potential applications of strain engineering in functional devices.
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Summary: This paper investigates a new phenomenon in the cyclic plasticity of AA6014-T4P, namely compression-induced softening, and presents a modified Y-U model to predict this effect. The permanent softening magnitude is found to have a linear relationship with the compressive pre-strain.
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Nanyun Bao et al.
Summary: This study systematically investigates U-Nb intermetallic compounds and predicts new compound formations under different pressures. Two new compounds (U1Nb6 and U2Nb1) were identified to be thermodynamically stable at ambient and high pressures. Other metastable U-rich compounds were also discovered. The properties of these compounds were thoroughly studied, showing that the new structures are dynamically and mechanically stable in the corresponding pressure range. These findings will enrich the understanding of U-based alloys and provide meaningful predictions for future experimental research.
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Summary: This study investigates the structural, mechanical, and thermodynamic behaviors of AlSi2Sc2 under uniaxial tensile loading using first-principles calculations. The lattice parameters a and c depend on the Al-Si and Sc-Si bonds, respectively. Tensile stress-strain curves reveal ideal tensile strengths of 16.1 GPa and 21.2 GPa along the a- and c-axes, respectively. The compound becomes mechanically unstable when the strain exceeds 0.1 and 0.3 along the a- and c-axes, respectively. The polycrystalline elastic constants, Debye temperature, and minimum thermal conductivity decrease with increasing strain along both axes. The Al-Si bonds originate from the hybridization of the Al-3p and Si-3p states, while the Sc-Si bonds originate from the Sc-3d and Si-3p states.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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Summary: The solid-liquid interfacial free energy and anisotropy of the Al-Mg binary alloy system were studied using MD simulations and CFM. The MEAM potential predicted the melting temperature and phase equilibria of the system. The interfacial free energy was found to agree with experimental values, and anisotropy was observed in the growth direction.
COMPUTATIONAL MATERIALS SCIENCE
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Summary: In this study, the microstructure and sulfide stress corrosion cracking (SSCC) of 304 stainless steel pre-strained at cryogenic and room temperature were investigated. The susceptibility of SSCC in 304 SS is significantly increased with the rise of pre-strain due to the acceleration of the formation of precipitates and dislocation. Cryogenic pre-strained specimens exhibit higher resistance to SSCC. The development of strain-induced epsilon and alpha' martensite, as well as crystal defects such as deformation bands, twins, stacking faults, and dislocation, caused by pre-strain accelerates the SSCC process. Cryogenic deformation results in more martensite formation, while the uniform occurrence of microstructure evolution only plays a limited role in SSCC.
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Mingjun Peng et al.
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ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
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Hsin-Feng Yang et al.
Summary: The mechanical properties, microstructures, and fracture morphologies of TiNi intermetallic alloys with different niobium (Nb) additions were investigated. The addition of 2 to 4 at.% Nb increased the strength of the alloy, while a further increase to 6 at.% Nb resulted in a significant reduction in strength. The plastic flow stress and strain rate sensitivity increased with increasing strain rate under both loading conditions (static and dynamic).
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Haoran Liu et al.
Summary: This study evaluates the effect of trace addition of Ag on the microstructure, tensile strength, and fracture toughness of novel Al-Mg-Zn alloys. The addition of Ag improves the age hardening response and refines the density and size of the matrix precipitates (MPts), but weakens their ability to obstruct dislocation motion, leading to no improvement in the strength of the alloys. The addition of Ag also has different effects on fracture toughness depending on the concentration, with 0.2 wt% Ag improving it and 0.4 wt% and 0.6 wt% Ag decreasing it.
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Summary: It is well known that variations in alloy composition and grain size can effectively improve the mechanical properties of non-heat-treatable aluminum alloys like Al-Mg alloys. This study conducted in-situ neutron diffraction experiments to investigate the evolution of dislocation density and characteristics during tensile deformation of Al-Mg. The results showed that higher Mg content and smaller grain size led to higher dislocation density, resulting in higher flow stress and strain hardening rate.
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Summary: Diamond, as the hardest material in nature and an extreme electronic material, can undergo deep elastic straining to fundamentally change its bulk band structures and achieve sample-wide uniform elastic strains, which highlights its immense application potential for photonics, electronics, and quantum information technologies.
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JOURNAL OF SOLID STATE CHEMISTRY
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Summary: Al-Mg-Mn-Er-Zr alloy produced through a combination of cold rolling and heat treatment has been studied on its microstructure evolution, strengthening mechanism, and corrosion properties. The results demonstrated that the dispersion of coherent Al-3 (Er, Zr) nanoscale particles effectively pinned dislocations and increased the strength, with dislocation strengthening considered as the primary method. The alloy's corrosion resistance decreased after cold rolling, but appropriate processing can improve both mechanical properties and corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
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TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
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