Milling Cutting Tools : Ceramic Beats Carbides (US)

For heat-resistant super alloys, the cutting speed of carbide milling cutters is approx. 50m/min. Ceramic milling cutters offer a different approach, with cutting speeds of up to 1,000m/min. The range of applications of ceramic cutting tool materials includes nickel-based, cobalt-based and iron-based heat-resistant alloys in the ISO S group. Typical alloys are for example Inconel 718, René 80, Nimonic 80A, Haynes 556, Mar-M-247 and Stellite 31. These heat-resistant super alloys (HRSAs) are the preferred choice for the use in the hot section of aircraft engines.

Cutting tool specialist, Walter AG explains how the machining of heat-resistant super alloys can be achieved with the same feed rates as aluminium. Walter’s aerospace component manager, Stefan Benkóczy reports.

The high volume of orders in the aviation industry places great pressure on the capacity of engine manufacturers and their suppliers. Therefore, a reduction in component machining times would be highly beneficial. For heat-resistantContinue reading

Australian Navy to test Scandium Alloys (US)

On Nov 20, 2018, Scandium International has signed a Letter Of Intent (LOI) with Austal Ltd., the world’s largest aluminum shipbuilder and Australia’s largest defense exporter, to test scandium-containing aluminum alloys in marine applications. The LOI calls for the Scandium International to contribute various aluminum alloy samples containing scandium, for testing by Austal and potentially other third party testing groups, to determine suitability in marine and defense applications. In over thirty years of operation, Austal has constructed over 300 vessels for 100 operators in 54 countries around the world. Scandium International intends to publicly report a summary of the results at the conclusion of the program.

Australia-focused critical metals explorer Scandium International  will work with shipbuilder Austal (ASX:ASB) to test aluminum alloys containing scandium for marine applications. The companies have signed a letter of intent (LOI), stating Scandium International will provide Austal with a variety of aluminum alloy samples containing Continue reading

New High Entropy Alloy to Replace Platanium Alloys in Catalysts (US)

The industry has been traditionally deploying platinum alloys as catalysts for oxygen reduction, which is for example essential in fuel cells or metal-air batteries. Expensive and rare, that metal imposes strict restrictions on manufacture. Researchers at Ruhr-Universität Bochum (RUB) and Max-Planck-Institut für Eisenforschung have discovered an alloy made up of five elements that is noble metal-free and as active as platinum. They published their paper in the journal Advanced Energy Materials on October 21, 2018.  On photo Tobias Löffler, Alan Savan, Alfred Ludwig and Wolfgang Schuhmann (from the left) in the laboratory.

New neighbours form active centres

The catalytic properties of non-noble elements and their alloys are usually rather poor. To the researchers’ surprise, one alloy made up of five almost equally balanced components offer much better properties. This is because of theContinue reading

Rust Costs the Pentagon $21 Billion Per Year (US)

On Sept 201è, the first Soviet nuclear submarine, November-class K-3 “Leninsky Komsomol”, begins her journey to be restored and turned into a museum ship.

The Defense Department isn’t doing a good job determining how much to spend to prevent damage from nature’s basic chemical reactions.

Rust costs the Pentagon more money annually than many of its most expensive weapons systems—up to $21 billion per year, according to a Defense Department-commissioned audit released in March. The report indicates the corrosion of metals that make up modern weapons systems like fighter jets, ships, ballistic missiles and nuclear weapons can sometimes approach one-third of the total operations and maintenance costs of those systems. TheContinue reading

New Nanotwin Configuration Strengthens Metals (US)

Nanotwins have been shown to improve strength and other properties of metals. A new study shows strength can be further improved by varying the amount of space between nanotwins. (Credit Photo: @Gao Lab / Brown University)

A team of researchers from Brown University and the Institute of Metals Research at the Chinese Academy of Sciences has developed a new method to use nanotwins to strengthen metals. Nanotwins are the tiny linear boundaries in a metal’s atomic lattice that have identical crystalline structures on either side. The researchers found that changing the spacing between the twin boundaries, rather than maintaining consistent spacing, produces aContinue reading

U.S. Navy Installs First 3D-Printed Metal Part Aboard a Warship (US)

Display at the unveiling of Newport News’ new 3D metal printer, May 2018 (HII)

The U.S. Navy’s Naval Sea Systems Command (NAVSEA) has  approved the first metal part created by 3-D printing for shipboard installation. A prototype, 3-D printed-metal drain strainer orifice for a steam line will be installed on the carrier USS Harry S. Truman for a one-year test and evaluation trial. The DSO assembly is a steam system component that allows the drainage of water from a steam line while in use. Huntington Ingalls Industries – Newport News Shipbuilding (HII-NNS) proposed installing the prototype on an aircraft carrier for test and evaluation. “This install marks a significant advancement in the Navy’s ability to make parts on demand and Continue reading

Purdue University Raises $800,000 to develop high-performance propellant that uses an aluminum, lithium alloy for missile, space launch systems (US)

Static fire stand for a rocket test using a propellant called ALITEC that uses an aluminum, lithium alloy.   A test fire by Adranos Inc. of a high-performance, solid propellant for long-range missile and space launch systems. Adranos officials say the novel propellant has more thrust and is less corrosive than traditional solid propellants.  The propellant could be used by the Army, Navy, Air Force, NASA, and other Department of Defense agencies as well as U.S.-allied nations.

WEST LAFAYETTE, Ind. – Adranos Inc., a Purdue University-affiliated company developing a novel high-performance, solid propellant for long-range missile and space launch systems, has raised $800,000 to further advance the technology. Adranos is developing a propellant called ALITEC that uses an aluminum, lithium alloy that has more thrust and is less corrosive than traditional solid propellants. Brandon Terry discovered the innovative rocket fuel while working on his Ph.D. at Purdue. “This is a significant improvement over traditional fuels, and the Continue reading

Titanium pipework at 100 bars for the UK’s first electric propulsion system for satellites (US)

 

The first electric satellite propulsion system to be entirely designed and built in the UK is in the final stages of manufacturing and should be shipped out before the end of the year. The Xenon Propulsion System (XPS) module is a key part of Thales Alenia Space’s Spacebus platform for geostationary telecommunications satellites.  Electric propulsion, which uses and is often called “ion thrusters”, is increasingly being used by the commercial spaceContinue reading

Standford Innovative Artificial Intelligence Program Recreates the Periodic Table (US)

A Stanford team has developed an artificial intelligence program that recreated the period table of elements; they aim to harness that tool to discover and design new materials. (Credit Photo: Claire Scully)

In a first step toward generating an artificial intelligence program that can find new laws of nature, a Stanford team created a program that reproduced a complex human discovery – the periodic table.

It took nearly a century of trial and error for human scientists to organize the periodic table of elements, arguably one of the greatest scientific achievements in chemistry, into its current form. A new artificial intelligence (AI) program developed by Stanford physicists accomplished the same feat in just a few hours. Called Atom2Vec, the program successfully learned to distinguish between different atoms after analyzing a list of chemical compound

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Japanese researchers identified new alloy that can withstand ultra-high temperatures and pressure (US)

AsianScientist (Oct. 9, 2018) – A research group in Japan has identified a metal capable of withstanding constant forces at ultrahigh temperatures. Their findings are published in Scientific Reports. Heat engines are key to the future of harvesting energy from fossil fuels. Creep behavior—or a material’s ability to withstand forces under ultrahigh temperatures—is an important factor for heat engines since increased temperatures and pressures lead to deformation. Understanding a material’s creep can help engineers construct efficient heat engines that can Continue reading