On rate-dependence of hardmetal powder pressing of cutting inserts
2017 (English)In: Powder Metallurgy, ISSN 0032-5899, E-ISSN 1743-2901, Vol. 60, no 1, 7-14 p.Article in journal (Refereed) Published
The rate-dependence of hardmetal powder pressing in cutting insert production is investigated experimentally and numerically. In the latter case, the finite element method is relied upon using a continuum mechanics approach. In particular, possible rate-dependency due to creep deformation and rate-dependent friction is discussed with the experimental investigation focusing mainly on dimensional changes during sintering but also pressing forces. The results indicate that rate-dependent frictional effects are the dominating feature and accordingly, it can be argued that for the metal powders investigated here, creep deformations do not have to be accounted for in the constitutive description at the timescales relevant for powder pressing and when the shape after sintering is concerned. For the present powder, the apparent frictional effect decreases at higher pressing rates. Additional details of the friction behavior are studied comparing finite element simulations with experiments.
Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2017. Vol. 60, no 1, 7-14 p.
Rate-dependence, powder compaction, friction, creep, WC-Co powder, cutting inserts, material model, finite element simulations
IdentifiersURN: urn:nbn:se:kth:diva-205172DOI: 10.1080/00325899.2016.1260904ISI: 000396619000003ScopusID: 2-s2.0-85007143910OAI: oai:DiVA.org:kth-205172DiVA: diva2:1088219
QC 201704112017-04-112017-04-112017-04-11Bibliographically approved