Info
ISBN-13: 978-3-03835-993-7
Authors / Editors: D.J. Fisher
Pages: 160
Year: 2015
Edition: softcover
TOC: Table of contents
  Description

There are relatively few revolutions in the venerable and rather staid field of metallurgy. One can count among them the advent of metallic glasses, of superplastic metals, or of memory-alloys. The latest revolution involves the relatively staid topic of alloy formulation, but is all the more startling because the resultant materials break every long-cherished rule of alloy design. In particular, the famous empirical rules of Hume-Rothery are completely ignored. That is, in the archetypal high-entropy alloy, five metals are alloyed together in equal proportions regardless of atomic-size difference, valence or crystal structure. Commonsense would tell any experienced metallurgist that that could result only in a uselessly brittle mass of intermetallic compounds. But in a truly paradigm-shifting manner, Professor J.W.Yeh of Taiwan correctly predicted that a high configurational entropy could suppress the appearance of detrimental intermetallic compounds and lead to simple familiar microstructures having very useful properties. High-Entropy Alloys can exhibit, for instance, astounding hardness and strength and also have a very good corrosion resistance. The present book summarises the microstructures and properties of all of the high-entropy alloys.

Keywords: Microstructure and Mechanical Properties, Materials Processing, Alloy

Review from Ringgold Inc., ProtoView: Fisher introduces high-entropy alloys not to academic researchers, but to workers on the shop floor, predicting that the new class of alloys will be of great importance to them in the near future. In the main chapter, on the microstructure and mechanical properties, he considers general features, alloy design, alloys of from four to ten elements, thin-films and coatings, nitride coatings, and alloys as binder or matrix. Other chapters cover corrosion and oxidation; conductivity and magnetism; diffusion; and patents on alloy formulations, coatings, composites, and joining.

Ringgold Subjects:
— Engineering
— Materials science
— Mechanical engineering

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