A5100768777- Shape Memory Alloy Transformations
- High Entropy Alloys Studies
- Welding Techniques and Residual Stresses
- Microstructure and Mechanical Properties of Steels
- Additive Manufacturing Materials and Processes
- Titanium Alloys Microstructure and Properties
- Laser and Thermal Forming Techniques
- Magnetic Properties and Applications
- Advanced Welding Techniques Analysis
- Iron and Steelmaking Processes
- High-Velocity Impact and Material Behavior
- Hydrogen embrittlement and corrosion behaviors in metals
- Granular flow and fluidized beds
- High-Temperature Coating Behaviors
- Energetic Materials and Combustion
- Cyclone Separators and Fluid Dynamics
- Ion-surface interactions and analysis
Dalian Maritime University
2006-2024
Harbin Institute of Technology
2005
Ti6Al4V (TC4) is widely used in aerospace, marine equipment, and the petrochemical industry. However, dense oxide film on surface of this alloy will be destroyed reducing acid solution, resulting corrosion practical application. To enhance resistance TC4 environments, study employed laser cladding technology to deposit a CoCrW layer surface. Experimental results validated successful preparation dense, crack-free layer. The microstructure was characterized by predominant bulk grains minor...
Fe-Mn-Si shape memory alloys have excellent low-cycle fatigue performance and broad application prospects in the field of civil engineering construction. It is necessary to conduct comprehensive in-depth research on mechanical properties alloys. This study takes Fe17Mn5Si10Cr5Ni alloy as object. After solid solution treatment at different temperatures times, effect bending was studied using cycle tests. The phase composition fracture morphology sample were analyzed. results showed that can...
To reduce the residual stress and improve fatigue property of laser weldment by using self-accommodation characteristic Fe-Mn-Si shape memory alloys (SMAs), a Fe15Mn5Si12Cr6Ni alloy welding seam was formed inside 304 stainless steel with filler powder. The combination hole-drilling method ANSYS software used to research distribution law specimen. strength welded specimens SMAs (experimental materials) (comparative measured cycle bending test. microhardness tester. thermodynamic model process...
In this study, a cross-flow laser with maximum out power of 5kW was applied to the welding Fe-Mn-Si shape memory alloys (SMA). The optimal processing parameters 1mm thick SMA were established by orthogonal experiment. With parameters, 1600W, speed 2.2m/min, defocusing distance 0.6mm, tensile strength welded joint can achieve 93.5% base material, and weld undercut reinforcement transfer smoothly on surface seam cross-section morphology presents "X" shape. fracture appears in fusion zone, so...
Abstract In order to investigate the effect of stress concentration on mechanical properties Fe-Mn-Si shape memory alloy, Fe17Mn5Si10Cr5Ni alloy was selected as research object in this study. Specimens with different notch types and sizes were designed, uniaxial tensile tests conducted notched specimens at room temperature. The effects parameters stress–strain curve, strength, sensitivity, fracture mode studied. results indicate that is sensitive notches. V-shaped same radius exhibit...
TC4 Ti alloy with the excellent properties can be applied to many fields, but surface performance such as wear-resisting, fretting wear, contact corrosion etc.can't met for special demands. Laser cladding was on a improve its properties. Mixed Ni,Ti and Nb powders were put onto subsequently treated by laser beam. The experimental results show that hardness wear resistance are significantly improved. increase in is predicted related "adaptive" mechanism of SMA.The microstructure composition...
Interference connection is an effective method for improving the fatigue life of bolt connections. In this paper, a new interference was designed based on shape memory effect alloy. Using numerical simulation, finite element model established to analyze stress–strain rule and hole wall under different fit sizes. The results show that stress concentration formed at orifice connecting plate. When size less than 1%, has elastic deformation. 1.5%, plastic 2.5%, maximum plate close tensile limit...
The paper presents the stress self-accommodation characteristic of Fe-Mn-Si shape memory alloy, namely alloy causes positive/reverse ε martensitic transformation and accompanied by deformation in order to adapt variation outside macroscopical deformation. From XRD analysis, it is found that stress-induced γ↔ε its reverse would occur under tension-compression also validated alloy. In cycles tension compression deformation, can increase fatigue life reducing concentration, restraining plastics...
The stress induced martensitic transformation and shape memory effect in an Fe-17Mn-5Si-10Cr-5Ni alloy with different deformation condition is studied by XRD analysis, metallographical TEM observation. results show that the recovery ratio rapidly increases time increase, when suspend loading T< 10min; although amount of increases, decreases, T>10min, which reason stabilization martensitic. Suspending 10min can effective improve ratio.