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On rate-dependence of hardmetal powder pressing of cutting inserts
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).ORCID iD: 0000-0001-7674-8582
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).ORCID iD: 0000-0001-6232-8819
2017 (English)In: Powder Metallurgy, ISSN 0032-5899, E-ISSN 1743-2901, Vol. 60, no 1, 7-14 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Rate-dependence, powder compaction, friction, creep, WC-Co powder, cutting inserts, material model, finite element simulations
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-205172DOI: 10.1080/00325899.2016.1260904ISI: 000396619000003Scopus ID: 2-s2.0-85007143910OAI: oai:DiVA.org:kth-205172DiVA: diva2:1088219
Note

QC 20170411

Available from: 2017-04-11 Created: 2017-04-11 Last updated: 2017-06-29Bibliographically approved

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Staf, HjalmarOlsson, ErikLarsson, Per-Lennart
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