A5087441255- Additive Manufacturing and 3D Printing Technologies
- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Laser Material Processing Techniques
- Innovations in Concrete and Construction Materials
- Welding Techniques and Residual Stresses
- Cellular and Composite Structures
- Metal Alloys Wear and Properties
- Titanium Alloys Microstructure and Properties
- Injection Molding Process and Properties
- Metallurgy and Material Forming
- High-Velocity Impact and Material Behavior
- Nanofluid Flow and Heat Transfer
- Microstructure and Mechanical Properties of Steels
- Metal Forming Simulation Techniques
- Heat and Mass Transfer in Porous Media
- Technology Assessment and Management
- Structural Response to Dynamic Loads
- Structural Load-Bearing Analysis
- Topology Optimization in Engineering
- Structural Analysis and Optimization
- Heat Transfer and Optimization
- Manufacturing Process and Optimization
Auburn University
2018-2022
Isfahan University of Technology
2017-2018
The post-yield mechanical behavior of additively manufactured lattice structures (AMLS) is governed by the interplay between intrinsic (microstructural) and extrinsic (structural topology) properties at different length scales. Herein, we introduce a novel design optimization approach that accounts for scale separation size effects, which control deformation mechanisms, to achieve certain targeted macroscopic response. new topological designs are guided finding direct correlation...
Titanium alloys have been used extensively in aerospace and medical applications due to their exceptional strength weight ratio, biocompatibility, corrosion resistance. While these are known be difficult machine, they typically weldable. Therefore, various titanium-based recently considered for production via additive manufacturing technology. Additively manufactured titanium produce a wide range of high-performance components, which often under cyclic or periodic loading. the most commonly...
In this study, a new constitutive equation, using the extrapolation of dynamic recovery (DRV) flow stress curve and Avrami kinetics equation for recrystallisation (DRX), has been developed. The curves pertaining to unrecrystallised regions were extrapolated based on non-linear estimation strain hardening rate versus strain. critical () initiation DRX was determined utilising modelling up peak. order verify accuracy model, nineteen under conditions 7 different steels analysed. proposed model...
This study investigated the microstructure and tensile properties of NASA HR-1 (Fe-Ni-Cr) alloy using laser powder directed energy deposition (LP-DED) process. Laser power spot size were varied for deposition, it was noted that low could result in higher cooling rates finer microstructure. The melt pool depth width defect content increased with increase power. Out several (i.e., 350, 750, 1070, 2000, 2620 W), samples deposited 750 W demonstrated highest material density. In addition, effects...
Heat transfer increase has been always the industries' aim. One of methods to heat is manufacture exchangers with specific geometries such as wavy-tube exchangers. In this study, effects inserting homogenous porous media amplitudes a exchanger have investigated. A pipe length 4λ (λ wavelength) was considered. Surface waviness introduced by L*, which ratio wavelength half amplitude. The computations were repeated for three different L* values including 11, 19 and 25. Effects surface...
In powder-based metal additive manufacturing, one key specification that needs to be precisely optimized is the particle shape and size distribution of metallic powders. Particle influences flowability powder uniformity bed density (i.e. packing state powder). These eventually affect porosity, which ultimately fatigue performance fabricated parts. Therefore, it essential understand effect characteristics on behavior before additively manufactured parts can used in load-bearing,...
Abstract In this study, the logarithmic-power model has been used to predict hot deformation behavior of alloy 800H at high temperatures. This is for first time that examined flow stress curves with negligible softening strain rates. To end, obtained temperatures from 850°C 1050°C and rates 5 10 S −1 were employed. The Johnson–Cook Shafiei constitutive equation also prove accuracy in prediction 800H. Evaluation mean error different conditions showed can give a more precise estimation than...