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Latest Intermetallics Stories

Helping Aircraft Fly Further Using Hypergravity
2012-11-05 10:24:47

ESA ESA research has helped to develop an aircraft-grade alloy that is twice as light as conventional nickel superalloys while offering equally good properties. The path to creating this alloy required research under all types of gravity. Airlines are always looking for ways to save fuel by cutting down on weight without sacrificing safety. Generally, cutting weight by 1% will save up to 1.5% in fuel. For commercial airlines, this saving quickly adds up, offering cheaper flights and...

2012-03-12 20:02:54

Peritectic solidification involves the nucleation and growth of the primary phase, the peritectic reaction of the primary phase with the remnant liquid phase, and the microstructural evolution of the product peritectic phase. It provides an effective approach for the synthesis or processing of various kinds of advanced materials. Professor WEI Bingbo and his group from the Department of Applied Physics, Northwestern Polytechnical University (NPU), in Xi'an, China, have demonstrated novel dual...

2008-09-03 03:00:16

By Kundu, S Chatterjee, S; Olson, D; Mishra, B In the present study, copper was used as an intermediate material in diffusion bonding between titanium and stainless steel. The process was carried out in the temperature range of 850 [degrees]C to 1000 [degrees]C for 60 minutes and at 900 [degrees]C for 30 to 150 minutes under the compressive stress of 3 MPa in a vacuum. The effects of temperature and time on the microstructure of Ti | Cu | stainless steel diffusion-bonded joints were...

2008-07-26 03:00:31

By Peng, J Z Yang, X Z; Zhou, F C; Gray, M F According to the average lattice and atom model of the empirical electron theory (EET) of solids and molecules, effects of interstitial impurities on valence electron structures (VESs) and phase transformation of Ti-Al alloys are analysed. In particular, melting points or allotropic transformation in Ti-Al phase diagram affected by interstitial impurities are calculated using the bond energy formula of the EET. It is demonstrated that because of...

2008-07-24 03:00:47

By Xu, Jing Liu, Xingbo; Bright, Mark A; Hemrick, James G; Sikka, Vinod; Barbero, Ever The reactive wetting behaviors of MSA2020, an Fe-based superalloy, and 316L stainless steel in contact with a molten Zn-Al alloy were investigated by the sessile drop method. This investigation led to the following findings. (1) 316L not only suffered considerable wetting, but also reacted with the molten Zn- Al alloy at a higher rate than MSA2020. (2) The contact angle of MSA2020 wet by the molten Zn-Al...

2007-11-27 09:01:08

By Kundu, S Chatterjee, S Solid state diffusion bonded joints of commercially pure titanium and 304 stainless steel using a 300 [mu]m nickel interlayer were prepared at 850[degrees]C for 1.8-10.2 ks under 3 MPa load in vacuum. The diffusion bonds were characterised by light and scanning electron microscopy. The SEM-BSE images show the existence of different reaction layers in the diffusion zone. The composition of these layers was determined using an electroprobe microanalyser, indicating...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'