Amir Bolouri's Outputs (31)

Novel use of robotic 3D paste printing technology for the creation of ceramic shell investment casting moulds (2023)
Presentation / Conference Contribution

This paper presentation outlines early-stage, ongoing research into novel approaches with Additive Layer Manufacturing for the direct manufacture of ceramic shell investment casting moulds. The research is focused on the use of 3D printing with refra... Read More about Novel use of robotic 3D paste printing technology for the creation of ceramic shell investment casting moulds.

Investigation of energy absorption performances of a 3D printed fiber-reinforced bio-inspired cellular structure under in-plane compression loading (2023)
Journal Article

This article proposes glass-fiber-reinforced bone-inspired cellular structures to enhance energy absorption capability. The elastic modulus of the bone-inspired unit cell is obtained analytically based on the energy method and then employed in Partic... Read More about Investigation of energy absorption performances of a 3D printed fiber-reinforced bio-inspired cellular structure under in-plane compression loading.

Mechanical characterization of high volume fraction Al7075-Al2O3 composite fabricated by semisolid powder processing (2023)
Journal Article

The mechanical properties and physical characteristics of aluminum alloy composites can be significantly improved by adding reinforcing phases. However, the high loading of the reinforcement phase in Al7075-Al2O3 composites has not been thoroughly st... Read More about Mechanical characterization of high volume fraction Al7075-Al2O3 composite fabricated by semisolid powder processing.

Investigation of the equivalent mechanical properties of the bone-inspired composite cellular structure: Analytical, numerical and experimental approaches (2023)
Journal Article

This study investigated the development of an analytical model using the energy method and Castigliano's second theory to evaluate the equivalent mechanical properties for a bone-inspired cellular structure of a glass fiber-reinforced Polylactic Acid... Read More about Investigation of the equivalent mechanical properties of the bone-inspired composite cellular structure: Analytical, numerical and experimental approaches.

Modelling of the materials classification of in-orbit debris using DISCOSweb and other sources (2021)
Presentation / Conference Contribution

Space debris is a topic of growing concern as the space industry evolves. This paper describes the findings of a new model used to classify the materials used in current orbital objects. It utilises data from sources including ESA’s DISCOS (Database... Read More about Modelling of the materials classification of in-orbit debris using DISCOSweb and other sources.

Effects of shot peening and artificial surface defects on fatigue properties of 50CrV4 steel (2021)
Journal Article

Shot peening processes are commonly used for improving the fatigue properties of steels. Shot peening introduces a compressive residual stress field in the near surface of steel, which can reduce or stop the growth of fatigue cracks and improve fatig... Read More about Effects of shot peening and artificial surface defects on fatigue properties of 50CrV4 steel.

A new design for friction stir spot joining of Al alloys and carbon fibre reinforced composites (2020)
Journal Article

Friction stir spot welding (FSSW) has been recently developed to join dissimilar materials. However, the traditional requirement for a rotating tool consists of a pin and shoulder in FSSW leads to a complex joining process and unpredictable defects.... Read More about A new design for friction stir spot joining of Al alloys and carbon fibre reinforced composites.

High-performance bio-inspired composite T-joints (2019)
Journal Article

© 2019 Elsevier Ltd This paper introduces a novel bio-inspired design strategy based on the optimised topology of bird bone's joint to improve the strength-to-weight ratio and damage tolerance of composite T-joints. Better structuring the constituent... Read More about High-performance bio-inspired composite T-joints.

Investigating polyethersulfone interleaved Glass/Carbon hybrid composite under impact and its comparison with GLARE (2019)
Journal Article

A tough polyethersulfone (PES) membrane was utilized as a novel reinforcement to improve impact performance of a carbon/glass hybrid composite. The hybrid composite was made of a glass fibre/epoxy block that was sandwiched between two carbon fibre/ep... Read More about Investigating polyethersulfone interleaved Glass/Carbon hybrid composite under impact and its comparison with GLARE.

Transient Rheological Behavior of Semisolid SEED-Processed 7075 Aluminum Alloys in Rapid Compression (2018)
Journal Article

© 2018, The Author(s). The transient rheological behavior and microstructure evolution of semisolid SEED-processed 7075 aluminum alloys were studied using the rapid compression tests. The effects of the TiB2 grain refinement on the grain morphology a... Read More about Transient Rheological Behavior of Semisolid SEED-Processed 7075 Aluminum Alloys in Rapid Compression.

Effects of Iron-Rich Intermetallics and Grain Structure on Semisolid Tensile Properties of Al-Cu 206 Cast Alloys near Solidus Temperature (2016)
Journal Article

© 2016, The Minerals, Metals & Materials Society and ASM International. The effects of iron-rich intermetallics and grain size on the semisolid tensile properties of Al-Cu 206 cast alloys near the solidus were evaluated in relation to the mush micr... Read More about Effects of Iron-Rich Intermetallics and Grain Structure on Semisolid Tensile Properties of Al-Cu 206 Cast Alloys near Solidus Temperature.

Study on dimensional and corrosion properties of thixoformed A356 and AA7075 aluminum bipolar plates for proton exchange membrane fuel cells (2014)
Journal Article

Metallic bipolar plates for polymer exchange membrane (PEM) fuel cells are currently manufactured by stamping of thin sheets. However, there are dimensional and shape errors of microchannels because of forming limitation such as spring back of thin s... Read More about Study on dimensional and corrosion properties of thixoformed A356 and AA7075 aluminum bipolar plates for proton exchange membrane fuel cells.

Thixoforging of wrought aluminum thin plates with microchannels (2014)
Journal Article

A direct die-filling thixoforging method is designed to fabricate aluminum thin plates with a pattern of microchannels in a single forming operation. Extruded AA2024 and AA7075 wrought aluminum billets are used. A recrystallization and partial remelt... Read More about Thixoforging of wrought aluminum thin plates with microchannels.

Effect of forming conditions on mechanical properties of rheoformed thin plates with microchannels using electromagnetic stirring (2014)
Journal Article

Rheoforming is a near net-shape manufacturing technology for fabricating components from light alloys in their semisolid states with improved mechanical properties. In this work, a feasibility study on the fabrication of Silafont 36 aluminum thin pla... Read More about Effect of forming conditions on mechanical properties of rheoformed thin plates with microchannels using electromagnetic stirring.

Thin-plate forming by thixo- and rheoforging (2014)
Journal Article

Copyright © 2014 Chul Kyu Jin et al. Thin plates with a thickness of 1.2 mm are fabricated using two processes, thixoforging and rheoforging, which are semisolid forming techniques. The die design, formability, microstructure, and mechanical properti... Read More about Thin-plate forming by thixo- and rheoforging.

The effect of billets extruded by a curved and flat-face die on the semisolid characteristics and tensile properties of thixoformed products (2013)
Journal Article

In this study, A356 aluminum billets in different extruded states are used as feedstock for the thixoforming. The extrusion billets were fabricated by a hot extrusion process through a flat-face and a curved die. After the induction reheating of the... Read More about The effect of billets extruded by a curved and flat-face die on the semisolid characteristics and tensile properties of thixoformed products.

Processing of low-carbon cast steels for offshore structural applications (2013)
Journal Article

Cast steels with carbon contents of approximately 0.05%, 0.1%, and 0.2% (low-carbon steels) were processed. The investigated steels were first cast. Fully lath martensite was obtained after austenitization and water quenching of the cast steels. The... Read More about Processing of low-carbon cast steels for offshore structural applications.

Rheoforging of thin case for IT devices with optimal process parameters and new type die design (2013)
Journal Article

The latest trend in the cell phone component industry to use aluminium and magnesium alloys has resulted in the advanced processing technologies. Semi-solid forming process that is advantageous for the mass production of thin parts with complex shape... Read More about Rheoforging of thin case for IT devices with optimal process parameters and new type die design.

Characteristics of thixoformed A356 aluminum thin plates with microchannels (2013)
Journal Article

A356 aluminum thin plates with a thickness of 1.2 mm were produced via thixoforming process under different temperatures ranging from 585°C to 610°C. In addition to large primary α-Al grains, unique fine secondary α-Al grains (equivalent diameter bel... Read More about Characteristics of thixoformed A356 aluminum thin plates with microchannels.

Thixoforming A356 aluminum bipolar plates at high solid fractions (2013)
Journal Article

Thixoforming investigations have been developed primarily for the manufacturing of bulk components, and the current knowledge is very limited with respect to the fabrication of thin cross sections of alloys. We studied the effectiveness of thixoformi... Read More about Thixoforming A356 aluminum bipolar plates at high solid fractions.

Tensile properties and microstructural characteristics of indirect rheoformed A356 aluminum alloy (2012)
Journal Article

The effects of rheoforming parameters such as the rheoforming temperature and pressure on the tensile properties of H-shaped components were examined. An H-shaped component is useful for practical investigation into the influence of different wall th... Read More about Tensile properties and microstructural characteristics of indirect rheoformed A356 aluminum alloy.

The effect of heat treatment on the mechanical properties of a low carbon steel (0.1%) for offshore structural application (2012)
Journal Article

In this study, a low carbon cast steel (0.1% C) alloy designed for offshore structures, and the mechanical properties of the alloy under different heat treatment cycles have been evaluated. The effect of austenitizing time on the austenite grain size... Read More about The effect of heat treatment on the mechanical properties of a low carbon steel (0.1%) for offshore structural application.

Coarsening of equiaxed microstructure in the semisolid state of aluminum 7075 alloy through SIMA processing (2011)
Journal Article

In the present study, the coarsening mechanism of equiaxed grains in the semisolid state of aluminum 7075 alloy, treated via strain induced melting activation process, was investigated. The kinetics of equiaxed grain growth in the semisolid state of... Read More about Coarsening of equiaxed microstructure in the semisolid state of aluminum 7075 alloy through SIMA processing.

Correlation between solid fraction and tensile properties of semisolid RAP processed aluminum alloys (2011)
Journal Article

Recrystallization and remelting (RAP), a promising route for thixoforming process, was used to process three aluminum alloys, AA2024, AA6061, and A356, under experimental conditions designed to yield various solid fractions (liquid fractions) within... Read More about Correlation between solid fraction and tensile properties of semisolid RAP processed aluminum alloys.

A study on semisolid processing of A356 aluminum alloy through vacuum-assisted electromagnetic stirring (2011)
Journal Article

In this study, a vacuum-assisted electromagnetic stirring system was designed and manufactured in order to minimize the defects such as porosities in the semisolid processing A356 aluminum alloy by electromagnetic stirring (EMS). A sleeve cooling sys... Read More about A study on semisolid processing of A356 aluminum alloy through vacuum-assisted electromagnetic stirring.

Study on the effects of the compression ratio and mushy zone heating on the thixotropic microstructure of AA 7075 aluminum alloy via SIMA process (2010)
Journal Article

The effects of compression ratios on the microstructure evolution of semisolid Al7075 alloy produced by the strain induced melt activation (SIMA) process were investigated. The samples were cold deformed by compression into the different heights up t... Read More about Study on the effects of the compression ratio and mushy zone heating on the thixotropic microstructure of AA 7075 aluminum alloy via SIMA process.

Tensile deformation behavior of Al-Cu 206 cast alloys near the solidus temperature
Presentation / Conference Contribution

© 2017 Trans Tech Publications, Switzerland. To study the micromechanics of semisolid deformation, a modified experimental set-up is employed in Gleeble 3800 thermomechamical testing unit to achieve a uniform temperature distribution in partially rem... Read More about Tensile deformation behavior of Al-Cu 206 cast alloys near the solidus temperature.

Microstructure and rheological properties of semi-solid 7075 slurries using SEED rheocasting process
Presentation / Conference Contribution

© 2016 Trans Tech Publications, Switzerland. The SEED rheocasting process was used to produce semisolid slurries of high strength 7075 aluminum wrought alloys. The effects of the SEED processing parameters on the microstructure of semisolid slurries... Read More about Microstructure and rheological properties of semi-solid 7075 slurries using SEED rheocasting process.

Semisolid forming of thin plates with microscale features
Presentation / Conference Contribution

© 2014 The Authors. Published by Elsevier Ltd. Thin plates (150 × 150 × 1.2 mm) with embedded corrugation are fabricated using semisolid forming. The die cavity used in the forming is designed using fluid analysis. A semisolid slurry is prepared by a... Read More about Semisolid forming of thin plates with microscale features.

Mechanical properties and microstructure of thin plates of A6061 wrought aluminum alloy using rheology forging process with electromagnetic stirring
Presentation / Conference Contribution

We propose the possibility of fabricating A6061 thin plates using the rheology forging process. Electromagnetic stirring (EMS) is used to fabricate a semi-solid slurry. A thin plate is formed by injecting the slurry into the forging die. When the pun... Read More about Mechanical properties and microstructure of thin plates of A6061 wrought aluminum alloy using rheology forging process with electromagnetic stirring.

Effect of Fe-rich intermetallics on tensile behavior of Al–Cu 206 cast alloys at solid and near-solid states
Presentation / Conference Contribution

Iron is one of the most common impurity elements in Al–Cu 206 cast alloys as it often causes the precipitation of Fe-rich intermetallic phases during solidification due to its extremely low solid solubility in aluminum. The characteristics of the Fe-... Read More about Effect of Fe-rich intermetallics on tensile behavior of Al–Cu 206 cast alloys at solid and near-solid states.