Researchers reveal fracture behaviour of sintered steel

February 11, 2015

February 11, 2015

Researchers from the Spain’s Universidad Carlos III de Madrid (UC3M) have identified new techniques to better understand the behaviour of sintered steels on fracturing. Scientists from the UC3M Powder Technology Group (GTP) have carried out research using a scanning electron microscope to obtain high-resolution images showing how these steels fracture when extreme loads are applied to them.

The materials that are the subject of the research are commercial sintered steels widely used in the automobile industry. Specifically, an Fe-C steel, a steel pre-alloyed with molybdenum (Astaloy Mo grade, Höganäs AB) and the well-known Distaloy AE (Höganäs AB), which is iron alloyed by diffusion with copper, nickel and molybdenum.

The results have helped in understanding the connection between microstructure and properties, which in these materials, it is claimed, entails a technological challenge as not only the phases but also the residual porosity that composes their microstructure come into play. Professor José Manuel Torralba, in the UC3M department of Materials Science and Engineering and Deputy Director of the IMDEA Materials Institute, stressed the fundamental role of porosity in these steels. “The research has revealed, among other things, that the most angular and irregular pores are the first points of ‘nucleation,’ that is, those that initiate the breaking,” stated Prof Torralba.

“Mechanical and on-site characterisation tests performed in the scanning electron microscope have been essential in understanding the mechanisms of fracture,” which, until this research, “we have never been able to determine, but instead only intuit,” added Elena Bernardo, one of the authors of the study from the UC3M Powder Technology Group.

This study has made it possible to view changes in the microstructure of the material while it is being tested. Moreover, the methodology used is claimed to be applicable to any type of alloy and not only to test its behaviour under pressure, but also its behaviour at high temperatures.


UC3M Powder Technology Group

Powder Metallurgy Review magazine:

Your email address:

Useful links: Download PM Review magazine | News headlines | Browse articles 

February 11, 2015

In the latest issue of PM Review…

Download PDF

Extensive Powder Metallurgy industry news coverage, and the following exclusive deep-dive articles and reports:

  • Phoenix Sintered Metals: A story of transformation, growth and community from America’s PM heartland
  • World PM2024 Yokohama: The stage is set for the PM industry to find a path to sustainable growth
  • The state of Europe’s hard magnets industry and the challenge of optimising the mass production of Nd2Fe14B permanent magnets

The latest news from the world of metal powders, delivered to your inbox

Don't miss any new issue of PM Review, and get the latest industry news. Sign up to our weekly newsletter.

Sign up

Join our community

Discover our magazine archive…

The free-to-access PM Review magazine archive offers unparalleled insight into the world of Powder Metallurgy from a commercial and technological perspective through:

  • Reports on visits to leading PM part manufacturers, metal powder manufacturers and industry suppliers
  • Articles on technology and application trends
  • Information on materials developments
  • Reviews of key technical presentations from the international conference circuit
  • International industry news

All past issues are available to download as free PDFs or view in your browser.


Browse the archive


Looking for PM production equipment, metal powders, R&D support and more?

Discover suppliers of these and more in our
advertisers’ index and buyer’s guide, available in the back of PM Review magazine.

  • Powders & materials
  • Powder process, classification & analysis
  • PM products
  • Atomisers & powder production technology
  • Compaction presses, tooling & ancillaries
  • Sintering equipment & ancillaries
  • Post-processing
  • Consulting & toll sintering
View online
Share via
Copy link