High-strength aluminum alloys are widely used in industries such as aerospace,automotive,and defense due to their excellent strength-to-weight ratio and good mechanical properties.However,optimizing their mechanical p...High-strength aluminum alloys are widely used in industries such as aerospace,automotive,and defense due to their excellent strength-to-weight ratio and good mechanical properties.However,optimizing their mechanical properties while maintaining cost-effectiveness and processing efficiency remains a significant challenge.This paper investigates the fundamental aspects of microstructure control and mechanical property optimization in high-strength aluminum alloys.It focuses on the influence of alloy composition,heat treatments,and processing techniques on the material's strength,ductility,toughness,fatigue resistance,corrosion resistance,and wear properties.The paper also explores the role of advanced experimental techniques,such as metallographic analysis,mechanical testing,and X-ray diffraction(XRD),in characterizing the microstructure and mechanical performance of these alloys.Moreover,it emphasizes the importance of microstructure refinement,solid solution strengthening,precipitation hardening,and the addition of specific alloying elements in optimizing the alloy's overall performance.The review provides valuable insights into the key strategies for designing high-strength aluminum alloys with enhanced mechanical properties,focusing on their applications in high-performance engineering fields.展开更多
A visco-plastic rate-dependent homogenization theory for particle-reinforced composites was derived and the equivalent elastic constants and the equivalent visco-plastic parameters of these composites were obtained. A...A visco-plastic rate-dependent homogenization theory for particle-reinforced composites was derived and the equivalent elastic constants and the equivalent visco-plastic parameters of these composites were obtained. A framework of homogenization the- ory for particle-reinforced W-Ni-Fe composites, a kind of tungsten alloy, was established. Based on the homogenization theory and a fixed-point iteration method, a unit cell model with typical microstructnres of the composite was established by using dynamic analysis program. The effects of tungsten content, tungsten particle shape and particle size and interface strength on the mechanical properties and the crack propagation of the W-Ni-Fe composite are analyzed under quasi-static and dynamic loadings. The stress-strain curves of the composite are given and the relation between the macro-mechanical characteristics and the microstructure parameters is explored, which provides an important theoretical basis for the optimization of the W-Ni-Fe composites.展开更多
文摘High-strength aluminum alloys are widely used in industries such as aerospace,automotive,and defense due to their excellent strength-to-weight ratio and good mechanical properties.However,optimizing their mechanical properties while maintaining cost-effectiveness and processing efficiency remains a significant challenge.This paper investigates the fundamental aspects of microstructure control and mechanical property optimization in high-strength aluminum alloys.It focuses on the influence of alloy composition,heat treatments,and processing techniques on the material's strength,ductility,toughness,fatigue resistance,corrosion resistance,and wear properties.The paper also explores the role of advanced experimental techniques,such as metallographic analysis,mechanical testing,and X-ray diffraction(XRD),in characterizing the microstructure and mechanical performance of these alloys.Moreover,it emphasizes the importance of microstructure refinement,solid solution strengthening,precipitation hardening,and the addition of specific alloying elements in optimizing the alloy's overall performance.The review provides valuable insights into the key strategies for designing high-strength aluminum alloys with enhanced mechanical properties,focusing on their applications in high-performance engineering fields.
基金supported by the National Natural Science Foundation of China (Grant No. 11032002 and 91016013)the program for New Century Excellent Talents in University+1 种基金National Basic Research Program of China (Grant No. 2010CB832706)the project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology)(Grant No. ZDKT10-03a)
文摘A visco-plastic rate-dependent homogenization theory for particle-reinforced composites was derived and the equivalent elastic constants and the equivalent visco-plastic parameters of these composites were obtained. A framework of homogenization the- ory for particle-reinforced W-Ni-Fe composites, a kind of tungsten alloy, was established. Based on the homogenization theory and a fixed-point iteration method, a unit cell model with typical microstructnres of the composite was established by using dynamic analysis program. The effects of tungsten content, tungsten particle shape and particle size and interface strength on the mechanical properties and the crack propagation of the W-Ni-Fe composite are analyzed under quasi-static and dynamic loadings. The stress-strain curves of the composite are given and the relation between the macro-mechanical characteristics and the microstructure parameters is explored, which provides an important theoretical basis for the optimization of the W-Ni-Fe composites.
