A5076564556- Shape Memory Alloy Transformations
- Advanced Welding Techniques Analysis
- Welding Techniques and Residual Stresses
- High Entropy Alloys Studies
- Additive Manufacturing Materials and Processes
- Aluminum Alloy Microstructure Properties
- High-Temperature Coating Behaviors
- Titanium Alloys Microstructure and Properties
- Electronic Packaging and Soldering Technologies
- Intermetallics and Advanced Alloy Properties
- Aluminum Alloys Composites Properties
- Laser and Thermal Forming Techniques
- Energy Efficient Wireless Sensor Networks
- Adhesion, Friction, and Surface Interactions
- Electrical Contact Performance and Analysis
- Manufacturing Process and Optimization
- Magnesium Alloys: Properties and Applications
- Mechanical stress and fatigue analysis
- Laser Material Processing Techniques
- 3D IC and TSV technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Additive Manufacturing and 3D Printing Technologies
- Metallurgy and Material Forming
- Surface Treatment and Residual Stress
- Industrial Vision Systems and Defect Detection
University of Electronic Science and Technology of China
2015-2024
Tianjin University
2008-2020
China Academy of Railway Sciences
2007-2018
Northumbria University
2018
Shougang Institute of Technology
2015-2017
Xidian University
2016
Huizhou University
2016
Capital Normal University
2016
University of Waterloo
2015
University of Science and Technology Beijing
2010-2011
Compared to the common selective laser sintering (SLS) manufacturing method, fused deposition modeling (FDM) seems be an economical and efficient three-dimensional (3D) printing method for high temperature polymer materials in medical applications. In this work, a customized FDM system was developed polyether-ether-ketone (PEEK) printing. The effects of speed, layer thickness, filling ratio on tensile properties were analyzed by orthogonal test four factors three levels. Optimal PEEK...
High entropy alloys have emerged as novel engineering with remarkable mechanical properties in a wide range of temperatures. Among the several high that were already described, equiatomic CrMnFeCoNi alloy is most studied one. In this work, gas tungsten arc welding as-rolled sheets was performed. The microstructural characterization encompassed use electron microscopy, including backscattered diffraction, synchrotron X-ray diffraction analysis, microhardness testing and evaluation. A...
Dissimilar joining involving high entropy alloys is currently being explored to evaluate the suitability of these novel advanced engineering materials in structural applications. Recently, a CoCrFeMnNi alloy 316 stainless steel was successfully attempted. However, joint ductility limited by lack deformation experienced cold-rolled base material during tensile loading. In this work, it shown that simply changing condition, from annealed, possible significantly improve fracture strain ≈ 5 10...
Wire and arc additive manufacturing (WAAM) technology was used for the fabrication of NiTiTa (2.5 at. % Ta) shape memory alloys (SMAs) first time, using commercialy available NiTi wire Ta foil as feedstock materials. The addition significantly increased phase transformation temperatures, leading to a room-temperature microstructure composed both B19′ martensite B2 austenite, (Ti,Ta)2Ni precipitates distributed at grain boundaries. Compared with WAAM fabricated counterpart, corrosion...
The AlCoCrFeNi2.1 eutectic high entropy alloy is of great interest due to its unique mechanical properties combining both strength and plasticity. Here, gas tungsten arc welding was performed for the first time on an as-cast alloy. microstructural evolution welded joints assessed by electron microscopy with backscatter diffraction, synchrotron X-ray diffraction analysis thermodynamic calculations. Microhardness mapping tensile testing coupled digital image correlation were used investigate...
Weldability studies on high entropy alloys are still relatively scarce, delaying the deployment of these materials into real-life applications. Thus, there is an urgent need for in-depth weldability novel advanced engineering alloys. In current work, as-cast Fe42Mn28Co10Cr15Si5 metastable alloy was welded first time using gas tungsten arc welding. The weld thermal cycle effect microstructure evolution over joint examined electron microscopy in combination with backscatter diffraction,...
Aiming to decouple the inherent relationship between mass transfer and heat in traditional arc-based directed energy deposition, a novel heterogeneous multi-wire indirect arc deposition (DED) has been developed for in-situ synthesis of Al-Zn-Mg-Cu alloy components. Multi-wires (Al-Cu Al-Mg) with bypassing Zn wire have used replace homogeneous twin-wires. The process, microstructure mechanical properties deposited components obtained by DED were investigated. results indicate that feeding...
In this work, high energy synchrotron X-ray diffraction was used during tensile testing of an as-cast eutectic AlCoCrFeNi 2.1 entropy alloy.Aside, from determining for the first time volume fractions existing phases, we further detail their role on alloy deformation behavior.The two major a soft disordered FCC and hard ordered B2 BCC, were observed to exhibit stress partitioning effect which can be modulate mechanical response material based relative fraction each phase.Dislocation density...
Obtaining a reliable NiTi to Ti6Al4V dissimilar joint exhibiting NiTi's superelasticity can provide design flexibility in aerospace and biomedical fields via integrating distinct material benefits. However, this materials couple is vulnerable severe embrittlement due the development of excessive intermetallic compounds (IMCs), namely Ti2Ni. Pd-free Pd-interlayered NiTi-Ti6Al4V laser joints were evaluated for their microstructure, compositional changes, thermodynamic mechanism, mechanical...
This study investigates the fabrication of spatially-variable heterostructured CoCrFeMnNi high entropy alloy (HEA) using pulsed laser processing. Two distinct approaches, involving single-(SP) and double-sided (DP) passes, were employed. Microstructural characterization through electron backscatter diffraction revealed significant differences. SP-HEA exhibited a spatially heterogeneous microstructure with coarse columnar grains, while DP-HEA displayed sandwich-like structure fine equiaxed...
In this work, a combination of in-situ high synchrotron X-ray diffraction and electron backscattered were used to systematically investigate the activation evolution deformation mechanisms in an as-cast Fe42Mn28Co10Cr15Si5 metastable entropy alloy deformed until fracture at room temperature. This work unveils critical role dual-phase γ-f.c.c. / ε-h.c.p. microstructure on response alloy. The different modes, slip, transformation induced plasticity (TRIP) twinning (TWIP), seen initiate loading...
Weldability plays a crucial role in the journey of high entropy alloys towards their engineering applications. In this study, gas metal arc welding was performed to join an as-rolled CoCrFeMnNi alloy using Monel 400 as filler wire. The present research findings demonstrate favorable metallurgical chemical reaction between and alloy, resulting compositional mixing within fusion zone that promotes solid-solution strengthening effect, counteracting typical low hardness associated these alloys....
Combined manufacturing of direct energy deposition (DED) and laser shock peening (LSP) exhibits great potentials in repairing titanium alloy components improving their mechanical properties. In this study, a DEDed repaired sample was fabricated by depositing TA15 powders on forged TC17 plate, subjected to following LSP treatment. The effects microstructures, residual stress, tensile properties samples were evaluated. After LSP, high-level compressive stress state (maximum =−596 MPa)...
A computational fluid dynamics (CFD) model for double-sided friction stir spot welding (FSSW) between AZ31 and ZK60 magnesium alloys using adjustable pins is proposed in this paper. Multiple phase flow theories are combined to track the metal interface distribution FLUENT software. The heat transfer material 5 stages of process, including pre-heating, plunging, welding, rising post-heating stages, presented. For further evaluation, calculated thermal responses compared with experimental...