Dr Hamid Doostmohammadi
School of Engineering
- Phone:(02) 4033 9301
The current research focus of Dr. Hamid Doostmohammadi is study of behaviour of Australian iron ores in ironmaking processes. This includes current and green sintering, and blast furnace ironmaking processes. He specifically puts light on use of iron ore in major ironmaking processes. An example is understanding of the cohesive zone of blast furnace by doing softening and melting experiments and also thermodynamic computations.
Blast furnace operations generates large amounts of carbon dioxide (CO2) every day. Replacing carbon monoxide (CO) with hydrogen (H2) inside the furnace results in generation of steam (H2O) instead of carbon dioxide. Another area of Hamid's work is sustainable production of iron and reducing carbon foot print during ironmaking processes.
Modern technologies increase demands on advanced materials. On the one hand constant development of new materials and on the other hand improvement of existing materials require high level of knowledge and expertise. This is especially true in the case of development of sustainable advanced materials. The focus of his research was in both areas while he has considered sustainability, efficiency and affordability of developed materials. He has extensive experience in process metallurgy and materials processing where he has worked with a wide range of metallic and composite materials including steel, aluminium alloys, copper alloys and aluminium matrix composites covering major parts of chain process, structure and properties. Also, improving quality of steel and aluminium alloys for better performance. Examples of his research are briefly explained below:
Steelmaking - Clean steel technologies
Dr. Doostmohammadi's contribution to steelmaking came back to 2007 when he was an Associate Researcher in Jernkontoret (Swedish iron and steel producers' association) and also a PhD student at KTH Royal Institute of Technology in Stockholm-Sweden. At the time, his research was in the area of steelmaking with a focus on clean steel. Non-metallic inclusion composition, size and also morphology were studied by both 2D (cross-sectional analysis) and 3D (electrolytic extraction) methods. In addition, he used INCA-Feature program to detect inclusions by a Scanning Electron Microscope integrated with EDS and WDS technologies. The results of this study showed that the accuracy of the composition determination for non-metallic inclusions by the 3D method is higher compared to the 2D method.
Additionally, he widely applied computational thermodynamics based on Calphad to model equilibrium between slag/liquid metal/inclusions during ladle treatment of tool and bearing steelmaking.
Advanced composite materials
He had the opportunity of supervising a group of graduate students to develop a new class of composite materials. Aluminium matrix composites and functionally graded aluminium composites as a class of light materials with high performance were designed and fabricated by a very cost-effective method. His research team developed custom based experimental equipment for compound and centrifugal casting to fabricate these composites. After a successful fabrication of a series of composites, developed equipment together with an image analysis software (which was patented later) gave me the opportunity to establish two new laboratories namely, Advanced Materials Lab and Image Processing Lab. These labs enabled his research team to fabricate, characterise and analyse the microstructure and mechanical properties of in-situ composites. His research team succeeded to fabricate and analyse Al-Al3Ti, Al-Al3Ni, Al-Al14Fe3, Al-(Al3Ti+Al2Cu) and Al-(Al7Cr+Al11Cr2) functionally graded in-situ composites.
Development of lead-free machinable alloys
Development of lead-free brass alloys which are safer material for drinking water is another example of his sustainable material development. He managed a group of graduate students to develop alternatives for toxic leaded-brass alloys. After fabricating, study of correlation between microstructure, mechanical properties and machinability of several alloyed brass he concluded that (Cu-Zn-Si), (Cu-Zn-Sn), (Cu-Zn-mg) and (Cu-Zn-Sb) alloys have improved machinability and are potential candidates for altering leaded brass alloys.
Double oxide film defects in liquid aluminium
Double oxide films (bifilms) are a type of non-metallic inclusion and a major source of deteriorating mechanical properties of Al cast alloys. This defect consists of two oxide layers and a volume of air trapped in between. In a series of studies, Hamid and his colleague studied the behaviour of double oxide film defects in liquid Al-Sr, Al-Mg and Al-Ca alloys. In all experiments, active elements (Sr, Mg and Ca) reduced alumina layer in double oxide film and led to the formation of mixed oxides (spinels) and/or active element oxide. They concluded that, the addition of small amounts of active elements to liquid Al changed the nature of double oxide film and facilitated the bonding process between two oxide layers. In addition, the thermodynamic and kinetics of transformation of alumina layer in this defect was studied both theoretically (classical and computational thermodynamics) and also experimentally (DSC and TGA).
Moreover, another series of his research was focused on the methods for removing or controlling of double oxide film. Among them, experimental and CFD modelling of mechanical stirring of the melt had shown promising results in removal of double oxide films from the liquid Al.
- Doctor of Philosophy, KTH Royal Institute of Technology, Sweden
- Iron ore
- Process metallurgy
- English (Fluent)
- Swedish (Working)
- Russian (Fluent)
- Persian (excluding Dari) (Fluent)
Fields of Research
|460501||Data engineering and data science||20|
|401999||Resources engineering and extractive metallurgy not elsewhere classified||40|
|Title||Organisation / Department|
|Research Associate||University of Newcastle
School of Engineering
|Dates||Title||Organisation / Department|
|2/9/2019 - 29/2/2020||Researcher||Royal Institute of Technology
|1/4/2015 - 1/9/2019||Associate professor||University of Kerman
Iran, Islamic Republic of
|1/5/2013 - 15/9/2015||Head of Department of Materials Engineering and Metallurgy||University of Kerman
Iran, Islamic Republic of
|1/3/2010 - 1/4/2015||Assistant professor||University of Kerman
Iran, Islamic Republic of
|2100||Materials Science and Technology||Refereed Article in a Scholarly Journal (HERDC)||Taylor and Francis||Reviewer|
|2100||Metallurgical and Materials Transactions B||Refereed Article in a Scholarly Journal (HERDC)||Springer||Reviewer|
|2100||Journal of Manufacturing Processes||Refereed Article in a Scholarly Journal (HERDC)||Elsevier||Reviewer|
|2100||International Journal of Heat and Mass Transfer||Refereed Article in a Scholarly Journal (HERDC)||Elsevier||Reviewer|
Principles of advanced thermodynamics and theory of kinetics in nanomaterials
University of Kerman
|Course Responsible and Teacher||1/9/2016 - 1/5/2019|
Thermodynamics of Materials
University of Kerman
|Course responsible and Teacher||1/3/2010 - 1/5/2019|
Advanced Process Science
Royal Institute of Technology
|Responsible for supervision of a group of students||1/9/2019 - 1/2/2020|
Simulation in Materials Engineering
University of Kerman
|Course Responsible and Teacher||1/9/2011 - 1/5/2018|
University of Kerman
|Course Responsible and Teacher||1/9/2011 - 1/5/2015|
For publications that are currently unpublished or in-press, details are shown in italics.
Journal article (24 outputs)
Yousefi M, Doostmohammadi H, 'Microstructural Evolution and Solidification Behavior of Functionally Graded In Situ Al Cr Composites During Centrifugal Casting', International Journal of Metalcasting, 15 650-663 (2021) [C1]
Functionally graded Al-based composite tubes, reinforced by Al¿Cr intermetallic particles, were prepared using horizontal centrifugal casting. A liquid Al¿Cr alloy containing 1, 3... [more]
Functionally graded Al-based composite tubes, reinforced by Al¿Cr intermetallic particles, were prepared using horizontal centrifugal casting. A liquid Al¿Cr alloy containing 1, 3, and 6¿wt% chromium was poured into the centrifugally rotating mold. The present study focused on the effectiveness of process parameters, including mold temperature and rotational speed, on the graded profile of in situ formed particles during centrifugal casting of Al¿Cr alloys. Detailed microstructure analysis revealed that the Al¿Cr intermetallic compounds formed in situ in the Al-matrix, and segregated onto the outer surface of the tube. Identified intermetallic particles were Al11Cr2 and Al7Cr, with more accumulation of the former near the outer surface. The impacts of the process parameters on the thickness of the particle segregation region were found to be dependent on the initial Cr content. At higher Cr content, the resulted gradient was steeper. Brinell hardness test showed an increasing trend of hardness corresponding with the increment of the area fraction of the intermetallic particles. The maximum hardness (54 HB) was achieved at the outermost region of the centrifugally cast Al-6wt%Cr composite at a mold temperature of 600¿°C and a rotational speed of 1800¿rpm.
Adineh M, Doostmohammadi H, 'A hybrid approach based on artificial neural network and cuckoo algorithm for optimization of the main cutting force during turning of Si brass alloys', SN Applied Sciences, 3 (2021) [C1]
Hoque MM, Doostmohammadi H, Mitra S, O dea D, Liu X, Honeyands T, 'High Temperature Softening and Melting Interactions Between Newman Blend Lump and Sinter', ISIJ International, 61 2944-2952 (2021) [C1]
Yousefi M, Doostmohammadi H, 'Spatial and microstructural dependence of mechanical properties and wear performance of functionally graded Al TiAl
Effect of morphology and spatial distribution of TiAl3 particles on the hardness, the tensile behavior and the wear performance of functionally graded Al¿TiAl3 in situ composite (... [more]
Effect of morphology and spatial distribution of TiAl3 particles on the hardness, the tensile behavior and the wear performance of functionally graded Al¿TiAl3 in situ composite (FGC) was investigated. Initially, FGC was produced by interaction between solid Ti and liquid Al. Based on the spatial distribution and morphology of TiAl3 particles in the microstructure of FGC, three distinctive regions including blocky-particle region, mixed-particle region (blocky and short plate particles) and lengthy plate-particle region were studied. Results of this study showed that the blocky-particle region had promoted tensile strength as well as highly improved wear resistance. In addition, this region with higher density of blocky particles and low interparticle spacing showed a brittle fracture. The mixed-particle region with a lower density of blocky particles had a ductile fracture mechanism while the plate-particle region showed cleavage fracture. The dominant wear mechanism for regions including blocky particles was determined to be mild oxidation while it was delamination wear for regions containing plate particles. Finally, correlation between mechanical properties, wear resistance and microstructure of FGC was discussed.
Adineh M, Doostmohammadi H, 'Microstructure, mechanical properties and machinability of Cu-Zn-Mg and Cu-Zn-Sb brass alloys', MATERIALS SCIENCE AND TECHNOLOGY, 35 1504-1514 (2019)
Sistaninia M, Doostmohammadi H, Raiszadeh R, 'Formation Mechanisms and Microstructure Characterization of Al/Al3Ni In-situ Composite by Compound Casting', METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 50 3020-3026 (2019)
Adineh M, Doostmohammadi H, Raiszadeh R, 'Effect of Si and Al on the microstructure, mechanical properties and machinability of 65Cu-35Zn brass', Iranian Journal of Materials Science and Engineering, 16 21-32 (2019)
Relations between the microstructure, mechanical properties and machinability of as-cast 65Cu-35Zn brass with various amounts of Al (1.89, 3.65 and 4.72 wt%) and Si (0, 0.83, 1.87... [more]
Relations between the microstructure, mechanical properties and machinability of as-cast 65Cu-35Zn brass with various amounts of Al (1.89, 3.65 and 4.72 wt%) and Si (0, 0.83, 1.87, 2.28 and 3.62 wt%) were investigated. Both Si and Al initially enhanced the ultimate tensile strength (UTS) and toughness of the brass samples, which led to an improvement in machinability due to a reduction in the main cutting force. A duplex brass with randomly oriented a plates in ß¿ matrix was found to have the best machinability among the other microstructures. It was found that besides the presence of brittle phases, such as ß¿ phase in the microstructure, the morphology and hardness of the phases involved had a significant infiuence on machinability.
Rajabi Z, Doostmohammadi H, 'Effect of addition of tin on the microstructure and machinability of alpha-brass', MATERIALS SCIENCE AND TECHNOLOGY, 34 1218-1227 (2018)
Yousefi M, Doostmohammadi H, 'Microstructure characterization and formation mechanism of functionally graded Al-TiAl3 insitu composite by liquid-solid interaction', JOURNAL OF ALLOYS AND COMPOUNDS, 766 721-728 (2018) [C1]
Bagherpour-Torghabeh H, Raiszadeh R, Doostmohammadi H, 'Removal of Bifilms from Al Melts by Stirring in Unbaffled and Baffled Crucibles', METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 49 3456-3469 (2018)
Bagherpour-Torghabeh H, Raiszadeh R, Doostmohammadi H, 'Role of Mechanical Stirring of Al-Mg Melt in the Healing of Bifilm Defect', METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 48 3174-3184 (2017)
Esfahani HB, Raiszadeh R, Doostmohammadi H, 'Weibull verification of reduced pressure test as a tool for assessing Al melt quality', INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, 30 87-95 (2017)
Esfahani HB, Raiszadeh R, Doostmohammadi H, 'The Effect of Strontium on the Strength of Layers of Double Oxide Film Defects', METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 47A 1331-1338 (2016)
Esfahani HB, Doostmohammadi H, Raiszadeh R, 'Decrease in the rate of diffusion of hydrogen through layers of bifilm defects in Al melt in the presence of Sr', INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, 29 179-185 (2016)
Alirezaei M, Doostmohammadi H, 'Microstructure evolution in cast and equilibrium heat-treated CuZn30-(Si) alloys', INTERNATIONAL JOURNAL OF CAST METALS RESEARCH, 29 222-227 (2016)
|Show 21 more journal articles|
Conference (1 outputs)
Doostmohammadi H, Andersson M, Steneholm K, Jonsson P, 'Effect of EAF Slag Carryover on Slag-metal Equilibrium Calculations for Ladle Degassing Process', EPD CONGRESS 2009, PROCEEDINGS, San Francisco, CA (2009)
Number of supervisions
|Commenced||Level of Study||Research Title||Program||Supervisor Type|
|2022||PhD||Optimal Sintering Conditions for Blast Furnace Ironmaking under Hydrogen Operation||PhD (Chemical Engineering), College of Engineering, Science and Environment, The University of Newcastle||Co-Supervisor|
|2020||PhD||Interaction of Ferrous Burden Materials in the Cohesive Zone of the Ironmaking Blast Furnace under Hydrogen Operation||PhD (Chemical Engineering), College of Engineering, Science and Environment, The University of Newcastle||Co-Supervisor|
|Year||Level of Study||Research Title||Program||Supervisor Type|
|2019||PhD||Fabrication of Leadless Free-cutting Brass and Evaluation of its Machinability||Materials Engineering, University of Kerman||Principal Supervisor|
|2019||PhD||A Study of Microstructure, Formation Mechanism and Mechanical Properties of Functionally Graded Al/Ti and Al/Cr In-situ Composites||Materials Engineering, University of Kerman||Sole Supervisor|
|2018||PhD||Study of the Binding between Noble Au-Pd Alloy and Ni-Cr Base Metal with Application in Narrow Overdenture Implants||Dentistry, Kerman University of Medical Sciences||Principal Supervisor|
|2018||PhD||A Study of the Effect of Mechanical Stirring on Behaviour of Bifilms in Liquid Al-Mg Alloys||Materials Engineering, University of Kerman||Consultant Supervisor|
|2016||PhD||Effect of Sr on the Strength of Bifilms in Liquid Aluminium Alloys||Materials Engineering, University of Kerman||Consultant Supervisor|
|2016||PhD||Investigating Reaction Kinetics of Direct Reduction of Iron Concentrate and Reactor Modeling of the Flash Reduction Process||Chemical Engineering, University of Kerman||Consultant Supervisor|
The map is a representation of a researchers co-authorship with collaborators across the globe. The map displays the number of publications against a country, where there is at least one co-author based in that country. Data is sourced from the University of Newcastle research publication management system (NURO) and may not fully represent the authors complete body of work.
|Country||Count of Publications|
|Iran, Islamic Republic of||20|