Settling a half century of debate, researchers have discovered that tiny linear defects can propagate through a material faster than sound waves do.
General Physics
Oct 5, 2023
0
63
A new generation of refractory alloys with excellent high-temperature performance is urgently demanded for aero-engines, gas turbines, and nuclear power plants. As the service temperature of their hot-ends is reaching 1800 ...
Materials Science
Sep 26, 2023
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39
An international research team led by maritime archaeologist Staffan von Arbin of the University of Gothenburg has studied what might be Europe's oldest shipboard cannon. The cannon was found in the sea off Marstrand on the ...
Archaeology
Sep 12, 2023
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188
Archaeologists have long been drawing conclusions about how ancient tools were used by the people who crafted them based on written records and context clues. But with dietary practices, they have had to make assumptions ...
Archaeology
Aug 18, 2023
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654
Introduced in 2004, high-entropy alloys (HEAs) are alloys composed of multiple principal elements in nearly equiatomic proportions. Their unique chemical composition results in a high degree of chemical disorder, i.e., entropy, ...
Analytical Chemistry
Jul 28, 2023
0
127
A team of chemists and engineers affiliated with a large number of institutions in China has found that using liquid metal to synthesize high-entropy alloy nanoparticles (HEA-NPs) is a viable alternative to conventional methods. ...
Shape memory alloys (SMA) remember their original shape and return to it after being heated. Similar to how a liquid transforms into a gas when boiled, SMAs undergo a phase transformation when heated or cooled. The phase ...
Condensed Matter
Jun 13, 2023
0
38
High-temperature shock (HTS) is an emerging synthesis method with kinetics-dominated non-equilibrium characteristics, which can achieve an ultrafast heating/cooling rate of ~105 K/s and a peak temperature larger than ~3000 ...
Nanomaterials
May 18, 2023
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3
Powder thermal diffusion alloying is an important surface strengthening method that can fabricate an anticorrosion coating on magnesium alloys.
Analytical Chemistry
Apr 27, 2023
0
16
A team of materials scientists from NASA working with a colleague from The Ohio State University and another from HX5 LLC has developed a 3D printing process that produces an alloy that is much more resistant to stress than ...
An alloy is a mixture or metallic solid solution composed of two or more elements. Complete solid solution alloys give single solid phase microstructure, while partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal (heat treatment) history. Alloys usually have different properties from those of the component elements.
Alloy constituents are usually measured by mass. Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the alloy. They can be further classified as homogeneous, consisting of a single phase, heterogeneous, consisting of two or more phases, or intermetallic, where there is no distinct boundary between phases.
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