Studies of residual stress, microcracks, hardness and microstructure of cold compacted metallic green bodies
2003 (English)In: Materials Research Society Symposium Proceedings, ISSN 0272-9172, Vol. 759, 53-64 p.Article in journal (Refereed) Published
The residual stresses have been measured by X-ray and neutron diffraction on PM green bodies manufactured by conventional and high speed compaction of iron powder with and without added copper and brass powder. Compressive residual stresses are present in a thin layer in both top and side surfaces. They are largest in the side surfaces due to plastic deformation of the surface material caused by the friction forces during ejection out of the die. In the interior of the green body residual stresses exist with certain region under compression (periferical regions) and other under tension (more central regions). It is unclear whether mixing iron powder with brass or copper powder leads to considerable phase stresses between the two phases.
Place, publisher, year, edition, pages
2003. Vol. 759, 53-64 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-30079DOI: 10.1557/PROC-759-MM2.6Local ID: 15542OAI: oai:DiVA.org:liu-30079DiVA: diva2:250900