A5007941040- Metal Alloys Wear and Properties
- Advanced materials and composites
- Tunneling and Rock Mechanics
- Erosion and Abrasive Machining
- Microstructure and Mechanical Properties of Steels
- Tribology and Wear Analysis
- Mechanical stress and fatigue analysis
- High-Velocity Impact and Material Behavior
- Mineral Processing and Grinding
- Coal Combustion and Slurry Processing
- Metal and Thin Film Mechanics
- Advanced machining processes and optimization
- Lubricants and Their Additives
- Hydrogen embrittlement and corrosion behaviors in metals
- Metallurgy and Material Science
- Intellectual Property Law
- Granular flow and fluidized beds
- Metallurgy and Material Forming
- Transportation Safety and Impact Analysis
- Coal and Its By-products
- Experimental Learning in Engineering
- Fatigue and fracture mechanics
- Metal Extraction and Bioleaching
- Drilling and Well Engineering
- Advanced Surface Polishing Techniques
Tampere University
2014-2023
Tampere University of Applied Sciences
2015
Two new low alloyed steels were developed with different fracture toughness values but at similar level of hardness same composition and microstructural phase. The subjected to impact-abrasion wear test. This work examines specifically the additional role during wear, using a newly high steel. Microstructural characterisation damaged samples revealed that better helps resist both impact abrasion damage.
This study investigated biomass blending and water washing to improve product quality from two-step pyrolysis of rice straw. Rice straw (RS) was mixed with groundnut shells (GNS) wheat (WS) in different weight ratios. Blending RS GNS/WS a 1:1 ratio increased the total bio-oil yields by 7-9% reduced gas char 5-7% < 2%, respectively. washed separately examine effect removing water-soluble ash elements. The optimum duration 60 min; removal efficiency then 26%. 4% over unwashed straw, decreased....
The extremely altered topmost surface layer, known as the white formed in a medium-carbon low-alloy steel result of impacts by angular 10–12 mm granite particles during slurry erosion process is comprehensively investigated. For this purpose, characteristics, morphology, and formation mechanism layer are described based on microstructural observations using optical, scanning transmission electron microscopies well nanoindentation hardness measurements modelling deformation. exhibits...
The prediction of the in-service behaviour metal-matrix composites produced by laser-directed energy deposition is a fundamental challenge in additive manufacturing. interaction between reinforcement phase and matrix has major impact on micro macroscopic properties these materials. This fostered exposition materials to high temperatures. Hence, it highly influenced thermal cycle manufacturing process. In this work, an experimental approach adopted determine influence main process parameters...
Stainless steels are commonly used in hydraulic components where they may be susceptible to cavitation erosion. In this study the erosion resistance of AISI 420-type stainless steel is examined after quenching and partitioning (Q&P) heat treatment. Q&P-samples were prepared with varying treatment parameters, their initial properties X-ray diffraction hardness measurements. Reference samples also tempering without partitioning. The eroded for 6 h an ultrasonic device, mass losses measured....
Experimental steels, a direct-quenched and partitioned (DQP) steel carbide-free bainitic (CFB), were tested along with commercial martensitic 500 HB grade wear resistant in high-stress abrasive conditions. The three steels had different microstructures consisting of varying fractions morphologies martensite, retained austenite, ferrite. results showed that the CFB lower mass loss compared to similar hardness level. DQP higher initial outperformed other two steels. Wear surface...
Abstract This study investigated heterotrophic bioleaching of rare earth elements (REEs) and base metals from spent nickel-metal-hydride (NiMH) batteries. Furthermore, the impacts phosphorous source [Ca 3 (PO 4 ) 2 , KH PO K HPO ] its concentration on organic acid production by Gluconobacter oxydans Streptomyces pilosus were evaluated. Phosphorous affected microbial metal leaching. Among studied sources, use resulted in highest both bacteria. Increasing 2.7 to 27 mM enhanced pyruvic S. 2.2...
This study encompasses a comprehensive account of the abrasive wear properties carbide-free, ultrahigh-strength bainitic steels processed through ausforming at three different temperatures well below recrystallization stop temperature followed by transformation close to Ms temperature. Five medium-carbon, high-silicon compositions were designed for suitably varying alloying levels carbon, vanadium, niobium, molybdenum, and aluminum. While lower enabled large number nucleation sites leading...
Energy can be saved by enhancing the service life of machinery and designing lighter units. These design changes enable, for example, lower fuel consumption larger payloads. The implementation this kind solutions, however, requires development better wear resistant materials. In study, resistance a structural steel three grades was evaluated with granite abrasive in tests simulating conditions heavy mining transportation. Two high-stress abrasion one impact-abrasion testing methods were...
A high speed slurry-pot wear tester was developed for close-to-reality heavy-duty testing of materials used in mineral applications. The samples are attached on four levels a pin mill configuration. and the sample rotation test method deliver reproducible results. This study focuses effects parameters large particle slurry testing. Parameters such as speed, size concentration were varied. effect duration also examined. Round steel water granite gravel parameter variations 4 to 10 mm size, up...