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    Global Exhibitors
  • 25000

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Making new catalysts from unique metallic alloys
Heusler alloys are magnetic materials made from three different metals that are not magnetic individually. The alloys are used broadly for their magnetic and thermoelectric properties, and their ability to regain their original shape after being deformed, known as shape memory. Investigations by Tohoku University's advanced materials scientist An-Pang Tsai and colleagues now show that these materials can also be fine-tuned to speed up chemical reactions. Heusler alloys have a typical composition of two parts metal X, one part metal Y, and one part metal Z (X2YZ). Each of the three come from a distinct region of the periodic table of elements. The original Heusler alloy, discovered in 1898, was Cu2MnAl, made from copper, manganese and aluminium. Many other combinations of metals were later found within the X2YZ arrangement.While Tsai and his colleagues were investigating another type of structure, called quasicrystals, in the late 1980s, they created a series of new compo...
2020 - 01 - 22
Making new catalysts from unique metallic alloys
Heusler alloys are magnetic materials made from three different metals that are not magnetic individually. The alloys are used broadly for their magnetic and thermoelectric properties, and their ability to regain their original shape after being deformed, known as shape memory. Investigations by Tohoku University's advanced materials scientist An-Pang Tsai and colleagues now show that these materials can also be fine-tuned to speed up chemical reactions. Heusler alloys have a typical composition of two parts metal X, one part metal Y, and one part metal Z (X2YZ). Each of the three come from a distinct region of the periodic table of elements. The original Heusler alloy, discovered in 1898, was Cu2MnAl, made from copper, manganese and aluminium. Many other combinations of metals were later found within the X2YZ arrangement.While Tsai and his colleagues were investigating another type of structure, called quasicrystals, in the late 1980s, they created a series of new compo...
2020 - 01 - 22
Ultrasound can make stronger 3-D-printed alloys
3D printed Titanium alloys under an electron microscope: sample on the left with large, elongated crystals was printed conventionally, while sample on the right with finer, shorter crystals was printed sitting on a ultrasonic generator. Credit: RMIT UniversityResearchers have used sound vibrations to shake metal alloy grains into tighter formation during 3-D printing.A study can have a significant impact on the inner micro-structure of 3-D printed alloys, making them more consistent and stronger than those printed conventionally.Lead author and Ph.D. candidate from RMIT University's School of Engineering, Carmelo Todaro, said the promising results could inspire new forms of additive manufacturing.'If you look at the microscopic structure of 3-D printed alloys, they're often made up of large and elongated crystals,' Todaro explained.'This can make them less acceptable for engineering applications due to their lower mechanical performance and increased tendency to crack during&...
2020 - 01 - 10
For stronger 3D-printed titanium alloys – just add copper?
The ability to 3D print titanium-alloy objects certainly does open up some intriguing possibilities. That said, the finished items aren't always as strong as they could be. Now, new research suggests that adding copper to those alloys could make a big difference.Typically, when objects are being 3D printed out of titanium alloy, a laser is used to selectively melt a powder consisting of titanium particles and other chemical elements. In this fashion, items are built up a layer at a time, as each layer of melted powder cools into a solid.According to scientists at Australia's RMIT University, however, problematic column-shaped crystals form within the material as it cools and bonds. These ultimately make the end product more prone to cracking and distortion.And unfortunately – unlike the case with some other metals – there are no commercially-available grain-refining compounds that can be used with titanium alloys, in order to address the problem.Working with colleagues f...
2020 - 01 - 03
Russian scientists create superhard alloy for mining in Arctic region: Project
Russian scientists have developed a new generation of extrahard alloys, which will be used for the creation of equipment for mining in the extreme conditions of the Arctic region, said Yevgeny Levashov, the project manager and a professor of the Russian National University of Science and Technology.According to Levashov, the new alloys were created as part of the state program for the development of the Arctic region and they will double the strength and durability of mining equipment.'This is a technology for the production of a new generation of coarse-grained hard alloys with a particularly homogeneous structure with rounded tungsten carbide grains and a nanomodified cobalt binder,' Levashov said.Industrial tests of the new alloy were conducted in late November at a mine in Russia's Kemerovo region where a combine machine processed over 700 cubic meters of rock at a depth of 820 feet.The new development is expected to significantly increase the efficiency of mining in the Arctic reg...
2019 - 12 - 27
Iran to produce 28mn tons of steel by yearend
TEHRAN, Dec. 01 (MNA) – Deputy Minister of Industry, Mine and Trade and Chief Executive of Iranian Mines and Mining Industries Development and Renovation Organization (IMIDRO) Khodadad Gharibpour said that Islamic Republic of Iran will produce 28 million tons of steel by the end of the current Iranian calendar year (to end March 20, 2020).He said that the country managed to export more than six million tons of steel in the first half of the current year (from March 21 to Sept. 22).Given the indigenized technical knowhow and knowledge made in Iranian mines and mineral sector, Iran’s steel industry has less been unfazed as a result of US sanctions imposed against Iran, IMIDRO chief added.IMIDRO has concluded separate contracts with reliable universities and academic centers of the country for indigenizing technical knowhow in mining sector, he said, adding, “for this purpose, IMIDRO has executed a number of 18 research projects in the first half of the current year (from March 21 to Sept...
2019 - 12 - 19
Adding copper strengthens 3D-printed titanium
IMAGE: 3D-PRINTED TITANIUM-COPPER BARS WITH TITANIUM POWDER AND COPPER POWDER.Successful trials of titanium-copper alloys for 3D printing could kickstart a new range of high-performance alloys for medical device, defence and aerospace applications.Current titanium alloys used in additive manufacturing often cool and bond together in column-shaped crystals during the 3D printing process, making them prone to cracking or distortion.And unlike aluminium or other commonly used metals, there is no commercial grain refiner for titanium that manufacturers can use to effectively refine the microstructure to avoid these issues.But now a new titanium alloy with copper, unveiled today in Nature, appears to have solved this problem.Professor Mark Easton from RMIT University's School of Engineering said their titanium-copper alloy printed with 'exceptional properties' without any special process control or additional treatment.'Of particular note was its fully equiaxed grain structure: th...
2019 - 12 - 06
5 reasons to use titanium alloy springs
In surgical components, implantables and other medical devices, springs play a variety of critical roles. Selecting the right spring material can often yield notable improvements in performance, lifespan and cost.In many medical applications, titanium alloy springs provide critical benefits compared to stainless steels or other materials. A careful cost-benefit analysis can help to ensure the best material is selected.Corrosion resistance and material stabilityTitanium provides remarkable corrosion resistance. This, along with its non-magnetic properties, makes it ideal for many medical and dental applications. While stainless steel has been the material of choice in the past, more and more parts are being designed to take advantage of this very light, strong, non-magnetic material with its excellent corrosion resistance.Titanium components are often recognized for their biocompatibility, and typically remain static once implanted. Some think of titanium as a material with the same cha...
2019 - 11 - 29
Indian steel exports surge in October
India's October finished steel exports surged by 60pc to 950,000t from a year ago, according to initial estimates by the Indian steel ministry.Year-to-date exports have risen by 27.7pc to 4.88mn t for April-October from the same period in 2018. India's fiscal year runs from 1 April.A surge in hot-rolled coil (HRC) exports is driving much of the growth.Indian mills are competing aggressively with Asian counterparts, especially into Vietnam, which has emerged as the biggest destination for Indian HRC in recent months.That trend is borne out in breakout data current through September. Its steel exports to Vietnam jumped to 1.04mn t in April-September from a low base of 293,000t in same period last year. HRC makes up the greatest share of total exports in April-September, at 2.28mn t, up by 68pc on the year.About 500,000t of HRC exports were booked in October, and 400,000t are likely to be booked in November, a Mumbai export agent estimated. Indian mills have raised offers this month, lift...
2019 - 11 - 11
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