A5056172571- Aluminum Alloys Composites Properties
- Aluminum Alloy Microstructure Properties
- Metal Forming Simulation Techniques
- Metallurgy and Material Forming
- Microstructure and Mechanical Properties of Steels
- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Metal Alloys Wear and Properties
- Microstructure and mechanical properties
- Advanced ceramic materials synthesis
- Surface Treatment and Residual Stress
- Metal and Thin Film Mechanics
- Electromagnetic Effects on Materials
- Material Properties and Applications
- Advanced machining processes and optimization
- Erosion and Abrasive Machining
- Titanium Alloys Microstructure and Properties
- Calcium Carbonate Crystallization and Inhibition
- Bone Tissue Engineering Materials
- High-Temperature Coating Behaviors
- Catalytic Processes in Materials Science
- Laser and Thermal Forming Techniques
- Advanced Surface Polishing Techniques
- Catalysis and Oxidation Reactions
- Non-Destructive Testing Techniques
PowerChina (China)
2024
AviChina Industry & Technology (China)
2019-2024
Commercial Aircraft Corporation of China (China)
2019
Imperial College London
2016-2018
University of Science and Technology Beijing
2012
Aluminum matrix composites have been widely used in aerospace and automotive fields due to their excellent physical properties. Cryogenic treatment was successfully adopted improve the performance of aluminum alloy components, while its effect mechanism on composite remained unclear. In this work, effects cryogenic microstructure evolution mechanical properties 15%SiCp/2009 were systematically investigated by means Thermoelectric Power (TEP), Scanning Electron Microscopy (SEM) Transmission...
A finite element model has been developed to determine the effectiveness of a cold compression technique reduce large residual stresses generated from quenching solution heat treated T-section components aluminium alloy AA7050. To compress long components, multi-step process is required with some amount overlap. parametric study performed effect ratio, friction coefficient, length overlap and component on stress distribution post-quenching after subsequent compression. Generally, percentage...
This article describes a novel cold working method for relaxing residual stresses in extra-long quenched T-section panels. Distortion led by quench-induced components is usually great concern the aviation industry. In this study, influence of rolling on scale-down AA7050 specimen experimentally and numerically investigated. An integrated numerical model was built to predict quenching subsequent processes. High levels compressive stress around surfaces T-profile specimens tensile surface (RS)...
A novel manufacturing process, enabling the production of high quality (i.e. with low and controllable residual stress (RS) distributions good mechanical properties) T-section 7xxx panels, has been established. This process provides a solution to induced distortion problems, which greatly concerns range industries, especially aircraft industry. consists three sequential steps — water quenching (WQ), cold rolling (CR) constrained ageing (CA). The effectiveness this was experimentally verified...
With the development of cross-wedge rolling (CWR) process in recent years, processing boundary parts by means CWR has witnessed a great breakthrough, especially field area reduction. Based on abundant experiment, latest is constructed. It affected rotation condition and products’ defects, such as necking, tensile failure internal rarefaction. The relationship between basic parameters these defects have been presented this paper, including reasons behind phenomena.
Residual stresses are often introduced into aluminum alloys through quenching processes performed to generate the required microstructure. Such residual known be deleterious integrity of component. Methods mitigate in quenched components therefore great importance. Cold rolling has been proposed as an effective technique remove large components. In this work, effectiveness cold reducing blocks AA7050 quantified using neutron diffraction technique. Neutron measurements have on two one and...
This work focuses on validating a model, which is defined using load controlled creep ageing data, from strain-controlled stress relaxation tests. A set of phenomenological constitutive equations were proposed. The material constants within the determined multi-step (120 °C× 6 h +177 °C ×7 h) creep-ageing test data. Temperature effects internal state variables (i.e. precipitate size, volume fraction and dislocation density) also considered. model was further used to predict phenomena under...
The effect of deep cryogenic treatment (DCT) on the artificial ageing kinetics a SiC particles reinforced aluminum alloy composite (SiCp-Al) is experimentally studied in this paper. evolutions both macro-properties (i.e., yield strength and ultimate tensile strength) microstructures (precipitates) have been investigated by set hardness tests, microstructural observations (scanning electron microscope, SEM transmission TEM) for SiCp-Al material with conventional heat (solution + quenching...
Oxidation behavior of Ni-10Cr alloy was investigated in the presence compressive stress at 900 ℃. kinetics, measured by two methods, indicated a parabolic rate law. The applied increased growth oxide scale. Evolution surface morphology scale revealed serious releasing forms during oxidation proceeding. In spite occasionally cracking and spalling generated, re-oxidation cracks spallation appeared.
This paper focused on FE simulations of the residual stress distributions and evolutions during a newly established manufacturing process (i.e. Solution heat treatment, Cold rolling Constrained ageing) for 1:1 industrial-sized aircraft T-section component, which is problematic component that currently experiencing stress-induced distortion issue. The integrated simulation included three sub-models (i) quenching, (ii) 1.5% cold (iii) T74 constrained ageing, using two sets validated...
The carbon nanotube (CNT) reinforced aluminum sheet with 2.0 mm thickness was hot rolled. friction stirring process (FSP) applied to make the reinforcements dispersion uniform. A finite element simulation conducted optimize forming parameters of a V-shaped skin part. It should be formed in two passes, and bottom corner radius is advisable greater than R = 30 first pass. part successfully profile accuracy error less 0.2 mm. part's mechanical properties show that composite still keeps high...
SiC reinforced aluminium composites (AMC) attract much attention in the aircraft and vehicle industries. Residual stress is generated due to intrinsic difference of expansion coefficients between reinforcements matrix, inconsistency internal external deformation, especially for large forgings. In this work, residual a rabbit ear like AMC forging released by vibration aging was investigated both simulation experimental approaches. simulation, excitation frequency, loading positions, force...
This paper studied the effect of cryogenic thermal cycling treatment on mechanical properties solution heat-treated particle-reinforced aluminum matrix composites. The main parameters used in orthogonal experiment design are ultra-low temperature preserving time (T): T1=24h, T2=36h, T3=48h, high-temperature medium (N): N1=boiling water, N2=175℃ hot oil, N3=circulated boiling cycle number (N: 1, 2, 3) and aging (t): t1=2h, t2=30h, V3=70h. treated composites were by various modern techniques....