What makes steel ductile

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Home Chemistry Materials Science. Credit: The University of Hong Kong. More information: B. He et al. High dislocation density—induced large ductility in deformed and partitioned steels, Science DOI: This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission.

The content is provided for information purposes only. SpaceX launches 53 Starlink satellites into orbit Nov 13, Nov 12, Methacrylic acid monomers - at what angle they connect with each other in polymer? Nov 09, Is the molecular formula for sugar correct? Nov 03, Is someone out here able to help me name these compounds? Oct 31, Radioluminescence and differing zinc sulfide preparations? Many steel components such as car body parts are made up of lots of tiny areas that alternate between two different crystal structures.

This coexistence of different crystal structures had always been considered detrimental for high-entropy alloys. Together with his colleagues, Li searched for a material that is as strong as a high-entropy alloy, but, like particularly ductile steels, possesses two coexisting crystal structures. This new alloy can be processed just as easily and cost-efficiently as a particularly ductile steel and absorb as much impact energy when incorporated in the body of a car.

At the same time, the alloy is strong enough that thin sheets made from it do not give way when subjected to a weak force. This story is adapted from material from Max-Planck-Gesellschaft , with editorial changes made by Materials Today.

The views expressed in this article do not necessarily represent those of Elsevier. Link to original source. Please enable JavaScript to view the comments powered by Disqus. Global Advanced Metals has developed tantalum feeds for a range of AM processes.

They are not brittle; however, up until now they have not been strong enough to enable, for example, the construction of car bodies with thinner sheets. In the crystals of steels, the atoms are more or less regularly arranged. Steels become particularly ductile though if they can switch from one structure to another.

This is because this process swallows energy, which can then no longer initiate any damage in the material. In a car body or other steel components, tiny areas then alternate with the two different atom arrangements. It was precisely this coexistence of the different crystal structures that was detrimental to the high-entropy alloys — thus far. Together with his colleagues, Li searched for a material that is, on the one hand, as strong as a high-entropy alloy, but, like particularly ductile steels, has two coexisting crystal structures.

The search produced an alloy made from 50 per cent iron, 30 per cent manganese and 10 per cent respectively of cobalt and chrome. At the same time, the material would be strong enough that thin and thus low-cost and resource-conserving metal sheets do not give way when subjected to a weak force.

Many publications by Max Planck scientists in were of great social relevance or met with a great media response. We have selected 13 articles to present you with an overview of some noteworthy research of the year. A composite material with metal layers of varying hardness can be produced through clever temperature variation. For the first time, it is possible to produce crystalline layers of precious metals that consist of a single atomic layer and which are semiconducting.

A tiny magnetic sphere, loaded with tumour treatment, rolls against the bloodstream, targeted towards cancer cells. There are many common household materials which block particles and droplets, and which can reduce the risk of infection from the coronavirus. The metal industry and materials science have numerous possibilities to make metallic materials more climate-friendly.