A5035345722- Additive Manufacturing Materials and Processes
- Fatigue and fracture mechanics
- Shape Memory Alloy Transformations
- Additive Manufacturing and 3D Printing Technologies
- Intermetallics and Advanced Alloy Properties
- High Temperature Alloys and Creep
- High Entropy Alloys Studies
- Titanium Alloys Microstructure and Properties
- Microstructure and Mechanical Properties of Steels
- Welding Techniques and Residual Stresses
- Microstructure and mechanical properties
- High-Temperature Coating Behaviors
- High-Velocity Impact and Material Behavior
- Semiconductor materials and interfaces
- Advanced ceramic materials synthesis
- Aluminum Alloys Composites Properties
- Non-Destructive Testing Techniques
- Architecture and Cultural Influences
- Magnetic and transport properties of perovskites and related materials
- Aluminum Alloy Microstructure Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Metallurgy and Material Forming
- Ultrasonics and Acoustic Wave Propagation
- Optical measurement and interference techniques
- Mechanical stress and fatigue analysis
Politecnico di Milano
2015-2024
University of Illinois Urbana-Champaign
2014-2017
One of the challenges associated with additive manufacturing (AM) is definition an assessment route which considers main process signatures AM process. To this end, work presents a complete benchmark activity for AlSi10Mg component produced by laser powder bed fusion process, aimed at advancing understanding fatigue resistance materials particular focus on comparison between performances small coupons and demonstrators. Four builds specimen geometries were manufactured to: (i) determine...
We develop an analytical expression for twin nucleation stress in bcc metal and alloys considering generalized planar fault energy the dislocations bounding nucleus. minimize total to predict twinning relying only on parameters that are obtained through atomistic calculations, thus excluding need any empirical constants. validate present approach by means of precise measurements onset Fe–50at% Cr single crystals showing excellent agreement. The experimental observations three activated slip...
Abstract In this study, AlSi10Mg samples were manufactured by laser-powder bed fusion process to explore the fracture toughness dependence on both built orientation and aging treatment. The experiments performed as-built directly-aged (200 $$^{\circ }$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow/> <mml:mo>∘</mml:mo> </mml:msup> </mml:math> C/4 h) conditions, with latter revealed be a valuable treatment for improving toughness. A comprehensive investigation...
We establish an overall energy expression to determine the twin migration stress in bcc metals. Twin succeeds nucleation often after a load drop, and model is of paramount importance. compute planar fault barriers elastic energies twinning dislocations including role residual (br) intersection types such as 1 0, 3 2 0. The derived provides relation with ratio 0.5–0.8 depending on resultant burgers vector types. Utilizing digital image correlation, it was possible differentiate advancement...
The fatigue properties of a Ti-48Al-2Cr-2Nb alloy obtained by electron beam melting (EBM) with patented process has been examined conducting high cycle tests performed at different loading ratios room temperature. Fatigue crack have for the purpose characterizing growth rate and threshold material. In order to assess sensitivity material presence defects adopt suitable design criteria, artificial also defect size ratio. interpreted adoption model based on small approach, highlighting...
Probabilistic routines are necessary to determine the permissible design stress when operational conditions of traditional gas turbines further challenged reach higher performances in terms flexibility. This paper focuses on definition a probabilistic tool aimed simulate damage development under combined high and low cycle fatigue considering stochastic nature some variables introduced model. The considered present study long crack threshold ΔKth,LC slope growth law C so-called Paris region,...
The micro-lattices produced by additive manufacturing process (AM) represent a recent important advancement for engineering structural applications, in particular weight-saving purposes. design of the components manufactured with these meta-materials generally refers to idealized structures. In reality, geometry obtained AM profoundly differs from original one, local geometrical irregularities were found produce stress and strain localizations which are difficult be a-priori predicted...
Purpose Additive manufacturing (AM) enables the production of lightweight parts with complex shapes and small dimensions. Recent improvements in AM techniques have allowed a significant growth for industrial applications. In particular, is suitable materials shaped lattice, which are very attractive their design multi-functional properties. often characterised by geometrical imperfections, residual porosity, high surface roughness typically lead to stress/strain localisations decreasing...