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Topic Review
Bayer Red Mud Comprehensive Utilization Status
Red mud is a highly alkaline solid waste discharged in the alumina production process. The comprehensive utilization of Bayer red mud is mainly divided into the following aspects. (1) Building materials include the use of red mud for the production of cement or concrete; road cornerstones or pavement materials in road construction; and geopolymers, ceramics, or composites. (2) Applications in the environmental field include the use of red mud to remove heavy metals and improve acidic soils. (3) Applications in the chemical industry include the use of red mud to produce dyes, catalysts, coagulants, or adsorbents. (4) Recovery of valuable components from red mud includes recovery of alkali and extraction of elements, such as aluminum, iron, titanium, and scandium, and important metals, such as vanadium and gallium.
  • 306
  • 16 Jun 2023
Topic Review
TiN Coating on Drawing Force and Friction Coefficient
The influence of various process parameters on the deep drawing process is a current research topic in sheet metal forming technology. Starting from the application of the previously constructed original testing device, an original tribological model was developed based on the process of sheet metal strip sliding between flat contact surfaces under variable pressures. A complex experiment was executed using an Al alloy sheet, tool contact surfaces of different roughness, two types of lubricants and variable contact pressures.
  • 173
  • 08 Jun 2023
Topic Review
Direct Laser Deposition of Inconel 625
The direct laser deposition (DLD) process has seen rigorous research in the past two decades due to its ability to directly manufacture products followed by minimal machining. The process input variables play a vital role in determining the properties achieved in the products manufactured by the DLD method. Inconel 625, a nickel-based superalloy with exceptional mechanical performance and corrosion resistance, has been used in critical applications within the aerospace, process, and marine industry.
  • 224
  • 11 May 2023
Topic Review
Lithium-ion Battery (LIB) Recycling
The search for global CO2 net zero requires adapting transport vehicles to an electrification system for electric vehicles. In addition, the consumption of electric devices, and consequently batteries, has risen over the years. In order to achieve a circular economy, the spent batteries must be recycled. 
  • 276
  • 06 May 2023
Topic Review
Chemical and Physical Properties of Solid Salt Fluxes
Solid salt fluxes are inorganic compounds that are added during the treatment of molten aluminum to improve the final quality. An understanding of the chemical composition of the flux is essential for the assessment of the physical and chemical behavior of the flux. The chemical composition of the flux can be tailored to adjust properties such as density, viscosity, reactivity, and wettability. Such properties, in turn, will impart different functions to the flux. 
  • 790
  • 05 May 2023
Topic Review
Biorecovery of Critical Raw Materials through Archaeal factory
Bio-metallurgy is a promising alternative for e-waste valorisation based on biological routes of specialised microorganisms able to leach solid-containing metals. Because of the physiology of these microorganisms, microbial leaching can be economically feasible, besides being an environmentally sustainable process. Like Bacteria and Fungi, Archaea are also capable of metal leaching activity, though their potential is underestimated. Because of the physiology of these microorganisms, microbial leaching can be both economically and environmentally sustainable. Archaea, Bacteria and Fungi, are capable of metal leaching activity, although their potential is underappreciated.
  • 258
  • 04 May 2023
Topic Review
Applications of Aluminum-Si Alloys
Aluminum alloys are at the pinnacle of the light metal world, especially in the automotive and aerospace industries.
  • 862
  • 25 Apr 2023
Topic Review
Decomposition Characteristics of Iron Ore during Smelting Reduction
Against the background of low global carbonization, blast furnace ironmaking technology with coking puts huge amounts of pressure on the global steel industry to save energy and reduce emissions due to its high pollution levels and high energy consumption. Bath smelting reduction technology is globally favored and studied by metallurgists as a non-blast furnace ironmaking technology that directly reduces iron ore into liquid metal without using coke as the raw material. The smelting reduction reaction of iron ore, which is the core reaction of the process, is greatly significant to its productivity and energy saving. 
  • 480
  • 23 Apr 2023
Topic Review
Carbon Nanotubes-Based Nano Materials
High modulus of about 1 TPa, high thermal conductivity of over 3000 W/mK, very low coefficient of thermal expansion (CTE), high electrical conductivity, self-lubricating characteristics and low density have made carbon nanotubes (CNTs) one of the best reinforcing materials of nano composites for advanced structural, industrial, high strength and wear-prone applications. This is so because it has the capacity of improving the mechanical, tribological, electrical, thermal and physical properties of nanocomposites.
  • 403
  • 01 Mar 2023
Topic Review
Laser Ultrasonic in a Smart Manufacturing Production Site
The advancement of laser ultrasonics has increased rapidly, providing applications for materials characterization as well as for industrial utilization, as a quality control device. The wide-ranging capabilities for high-temperature in-situ analysis of a variety of microstructural characteristics offers a multitude of possibilities for usage in R&D. One possibility to investigate in a contactless manner, in-situ, and at high temperatures is the laser ultrasonic (LUS) method. This measurement technique has been developed over the last decades for many fields of application and can be used in various different configurations. This method can be applied to a variety of analyses known from the conventional ultrasonic technique. In particular, defect detection is one of the most common applications, especially the detection of defects in terms of pores, voids, or adhesion defects, especially in castings or welds. However, such defect detections are also of great advantage in additive manufacturing. 
  • 406
  • 28 Feb 2023
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