Jicheng Zhuo, Zan Zhang, Ye Shan, Haiwei Zhang, Yongsheng Li
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引用次数: 0
Abstract
The α2 + γ two-phase γ-TiAl alloys with full lamellar structure exhibit excellent mechanical properties, which are potential blade materials for aero-engines working under stress and high-temperature. In this study, the evolution and stability of nano-lamella under external stress in γ-TiAl alloys are investigated by using phase-field simulation. The application of external stress affects the chemical potential and the local composition across the γ/γ and α2/γ interfaces. The tensile stress quickens the lamellar splitting for the stress concentration within the γ lamella, and accelerates the diffusion-induced coarsening of the γ lamella to form thicker lamella. In contrast, the compressive stress inhibits the splitting and coarsening, and refines the γ lamella. The results reveal the thermo-mechanical coupling induced evolution of nano-lamella in the γ-TiAl alloys operating at high-temperature and external stress.
期刊介绍：
It is the objective of this journal to provide an effective medium for the dissemination of recent advances and original works in mechanics and materials'' engineering and their impact on the design process in an integrated, highly focused and coherent format. The goal is to enable mechanical, aeronautical, civil, automotive, biomedical, chemical and nuclear engineers, researchers and scientists to keep abreast of recent developments and exchange ideas on a number of topics relating to the use of mechanics and materials in design.
Analytical synopsis of contents:
The following non-exhaustive list is considered to be within the scope of the International Journal of Mechanics and Materials in Design:
Intelligent Design:
Nano-engineering and Nano-science in Design;
Smart Materials and Adaptive Structures in Design;
Mechanism(s) Design;
Design against Failure;
Design for Manufacturing;
Design of Ultralight Structures;
Design for a Clean Environment;
Impact and Crashworthiness;
Microelectronic Packaging Systems.
Advanced Materials in Design:
Newly Engineered Materials;
Smart Materials and Adaptive Structures;
Micromechanical Modelling of Composites;
Damage Characterisation of Advanced/Traditional Materials;
Alternative Use of Traditional Materials in Design;
Functionally Graded Materials;
Failure Analysis: Fatigue and Fracture;
Multiscale Modelling Concepts and Methodology;
Interfaces, interfacial properties and characterisation.
Design Analysis and Optimisation:
Shape and Topology Optimisation;
Structural Optimisation;
Optimisation Algorithms in Design;
Nonlinear Mechanics in Design;
Novel Numerical Tools in Design;
Geometric Modelling and CAD Tools in Design;
FEM, BEM and Hybrid Methods;
Integrated Computer Aided Design;
Computational Failure Analysis;
Coupled Thermo-Electro-Mechanical Designs.
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