News

News

New Reactor-liner Alloy Material Offers Strength, Resilience

Data: 2019-03-07
Views: 16


This is Osman El Atwani (left) and Enrique Martinez at the transmission electron microscope.
Credit: Los Alamos National Laboratory

A new tungsten-based alloy developed at Los Alamos National Laboratory can withstand unprecedented amounts of radiation without damage. Essential for extreme irradiation environments such as the interiors of magnetic fusion reactors, previously explored materials have thus far been hobbled by weakness against fracture, but this new alloy seems to defeat that problem.

'This material showed outstanding radiation resistance when compared to pure nanocrystalline tungsten materials and other conventional alloys,' said Osman El Atwani, the principal investigator of the 'Radiation Effects and Plasma Material Interactions in Tungsten Based Materials' project at Los Alamos. 'Our investigations of the material mechanical properties under different stress states and response of the material under plasma exposure are ongoing.'

'It seems that we have developed a material with unprecedented radiation resistance,' said principal investigator Enrique Martinez Saez at Los Alamos. 'We have never seen before a material that can withstand the level of radiation damage that we have observed for this high-entropy [four or more principal elements] alloy. It seems to retain outstanding mechanical properties after irradiation, as opposed to traditional counterparts, in which the mechanical properties degrade easily under irradiation.'

Arun Devaraj, a materials scientist and project collaborator at Pacific Northwest National Laboratory, noted, 'Atom probe tomography revealed an interesting atomic level layering of different elements in these alloys, which then changed to nanoclusters when subjected to radiation, helping us to better understand why this unique alloy is highly radiation tolerant.'

The material, created as a thin film, is a quaternary nanocrystalline tungsten-tantalum-vanadium-chromium alloy that has been characterized under extreme thermal conditions and after irradiation.

'We haven't yet tested it in high-corrosion environments,' Martinez Saez said, 'but I anticipate it should perform well there also. And if it is ductile, as expected, it could also be used as turbine material since it is a refractory, high-melting-point material.'

Story Source:

Materials provided by Los Alamos National Laboratory



News / Recommended news More
2020 - 03 - 06
Rims play a big role in appeal of a car and so distinct – shiny ones in this case – contribute a fraction to a car’s resale value.Vehicles either have steel or alloy rims. The obsession with rims is actually more pronounced among youthful car enthusiast who for reasons subscribe to the high-octane life and so appeal is a key element. Rims play a big role in the appeal of a car and so distinct...
2020 - 02 - 27
It is extremely rare to find a metal where the potential demand is much greater than what anyone can supply. It has happened the past year with the emissions metals palladium and rhodium which were up 75% and 366%; so it makes good sense that scandium may be next.Scandium-Aluminum alloy is a key material in the lightweighting industryLightweighting of vehicles is a ma...
2020 - 02 - 20
Indian exports of unwrought aluminum alloy to China surged in the last two months of 2019 as the country provided ADC12 to Chinese diecasters normally supplied by domestic smelters, leading to a surge in feedstock zorba scrap prices to India.China imported 3,600t of aluminum alloy from India in December, up from none the prior year, according to China Customs. November imports were up to 1,400t, a...
Share:
Uniris Exhibition Shanghai Co., Ltd.
Shanghai Branch
Tel:4000 778 909
E-mail:irisexpo@163.com
  
Guangzhou Branch
Tel:020-8327 6389
E-mail:pmchina@unifair.com

CCEC CHINA official website
犀牛云提供企业云服务
Scan the QR code to visit the official website by phone