Articles tagged with Powder Metallurgy
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Researchers at Nanjing University of Aeronautics and Astronautics created an active metal metamaterial that can bend and recover its shape, enabling aircraft wings to morph smoothly in flight. The material is lightweight, strong, and capable of adjusting its shape on demand.
Global experts discuss the future of additive manufacturing in various applications, including bioprinting living tissues and creating smart consumer products. Researchers showcase advancements in machine learning, real-time sensing, and multi-material 3D printing.
Researchers developed novel artificial bone scaffolds with high deformation recovery capabilities, exceeding those of natural bone and conventional metallic scaffolds. These scaffolds allow for flexible adjustments of properties like strength and modulus to meet specific implantation site requirements.
Researchers are making progress in overcoming technical hurdles to create layered structures, continuous gradients, and fully three-dimensional architectures with programmable material variation. Optimized laser parameters and build sequences can enhance strength, control heat flow, and improve energy absorption.
A new magnet manufacturing process has been developed that produces strong permanent magnets quickly and uses less energy and is less expensive. The technique, called friction stir consolidation, eliminates porosity in the magnetic material and reduces oxidation.
Researchers developed an efficient model to simulate metal additive manufacturing processes, predicting defects and optimizing process parameters. The algorithm combines semi-analytic and finite volume models to predict thermal history and metallurgical state of printed parts.
Scientists at Shandong University have created a novel approach to fabricate high-performance NiTiNb shape memory alloys using laser powder bed fusion. The in-situ alloying process yields good mechanical and functional properties, surpassing conventional casting methods. By integrating material synthesis and structure forming, research...
Researchers have developed additively manufactured Ti-Ta-Cu alloys that exhibit improved biocompatibility and bacterial resistance, making them a promising alternative to traditional Ti6Al4V implants. The alloys were found to display remarkable synergistic effects in improving both in vivo biocompatibility and microbial resistance.
A team of researchers from City University of Hong Kong and Shanghai Jiao Tong University has developed a novel aluminium alloy with unprecedented fatigue resistance using advanced 3D printing techniques. The new alloy, called NTD-Al, surpasses the fatigue strength of high-strength wrought Al alloys and conventional metals.
Recent progress in metallic powders characterization, preparation, and reuse for laser powder bed fusion (L-PBF) enhances printing consistency and reduces costs. Novel cost-effective methods like fluidized bed and cold mechanically derived method are emerging to prepare powders.
Scientists review preparation techniques for copper matrix composites with ceramic particles, enhancing mechanical properties and thermal conductivity. The study highlights the importance of particle characterization, interfacial bonding, and advanced preparation methods to optimize composite performance.
Researchers at Huazhong University of Science and Technology have developed a systematic review of laser powder bed fusion (LPBF)-fabricated NiTi alloys. The study highlights the effect of process parameters on printability, mechanical properties, and functional behaviors of NiTi shape memory alloys. These findings provide evidence for...
A new digital twin of laser-directed energy deposition repair technology has been developed to improve industrial sustainability. The system automatically determines optimum forming conditions, reducing metal powder waste and increasing the effectiveness of the repair process.
A UVA research team developed a real-time detection method for keyhole pore generation in laser powder bed fusion, achieving a 100% prediction rate. This approach expands additive manufacturing capabilities for aerospace and other industries relying on strong metal parts.
A team of researchers from Japan and the USA have proposed an optimized design strategy for additive manufacturing using laser powder bed fusion. They simultaneously optimized laser hatching orientation and lattice density distribution to minimize residual stress in metal parts, reducing warpage by up to 39%.
Researchers developed in-situ Ni alloying method to tailor microstructure and enhance strength of LAAM Ti-6Al-4V alloy. The results show that Ni addition increases yield strength and tensile strength while decreasing ductility.
Researchers from Korea Maritime and Ocean University have developed a way to synthesize high-performance functionally graded materials with minimized defects. By controlling the mixing gradient of component materials, they improved mechanical properties and eliminated interfacial cracks.
A team of researchers at Indian Institute of Science has identified an alternative technique to produce metal powders for 3D printing, side-stepping the problems with atomisation. The new method uses surface grinding to create spherical powders with comparable quality to commercial gas atomised powders.
Researchers from City University of Hong Kong created a new titanium-based alloy using additive manufacturing, boasting unprecedented structures and properties. The alloy exhibits high tensile strength, excellent work-hardening capacity, and is up to 40% lighter than stainless steel, making it suitable for various structural applications.
University of Pittsburgh researchers received prestigious awards for their work on phase diagrams, thermodynamic properties, and uncertainty quantification in alloy powder production. Assistant Professor Wei Xiong won the inaugural CALPHAD Young Leader Award, while graduate student Xin Wang received the Best Poster Award.
The U.S. Department of Energy's Ames Laboratory has received funding to commercialize a gas atomization nozzle design for producing metal powders with customizable sizes and improved quality. The funding will support the adaptation of this technology in industrial manufacturing processes.
Researchers at HRL Laboratories successfully 3D print high-strength aluminum alloys, including Al7075 and Al6061, overcoming a long-standing challenge in additive manufacturing. Their nanoparticle functionalization technique prevents hot cracking and retains alloy strength.
A study investigates the feasibility of producing autoclaved aerated concrete (AAC) by combining MSWI bottom ash with CFBC fly ash, significantly reducing material costs. The researchers found that satisfactory properties can be achieved using this combination without additional additives.
Scientists have developed a new method to study steel fracturing using high-resolution images from a scanning electron microscope. The research revealed the connection between microstructure and porosity in sintered steels, identifying angular pores as initial points of 'nucleation' that initiate breaking.
Anderson's work on powder metallurgy and rapid solidification has led to the development of innovative materials, including rare earth compounds, magnetic materials, and lightweight porous materials. He is recognized for his ability to address both scientific and technical challenges and bring new materials to commercial use.
Researchers at Penn State have developed a new process for producing ultrafine metal powders, including silver and nickel, using a laser, household blender, and inexpensive reaction materials. The process produces particles in the 1-100 nanometer range, smaller than bacteria or viruses, with improved purity and uniformity.