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On the Influence from Pressing Agent (PEG) on the Elastic and Plastic Mechanical Behavior of Hard Metal Powder Compacts
KTH, Skolan för teknikvetenskap (SCI), Teknisk mekanik, Farkostteknik och Solidmekanik, Hållfasthetslära. Sandvik Coromant AB, R&D, SE-12680 Stockholm, Sweden..ORCID-id: 0000-0001-8653-393x
Sandvik Coromant AB, R&D, SE-12680 Stockholm, Sweden.;Scania CV AB, SE-15187 Södertälje, Sweden..
Sandvik Coromant AB, R&D, SE-12680 Stockholm, Sweden..
KTH, Skolan för teknikvetenskap (SCI), Teknisk mekanik, Farkostteknik och Solidmekanik, Hållfasthetslära.ORCID-id: 0000-0001-6232-8819
2023 (engelsk)Inngår i: Crystals, ISSN 2073-4352, Vol. 13, nr 6, artikkel-id 926Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

During unloading, pressed hard metal powder compacts expand (spring back), leading to unwarranted tensile stresses and, subsequently, crack initiation in the green body. Here, the elastic spring back and the green strength are analyzed for different types and amounts of the pressing agent PEG (polyethylene glycol). The results show that the plastic behavior, but not the elastic behavior, is influenced by a change of the pressing agent PEG. In this context, it should be stated that the risk for the initiation of cracks is influenced by both the elastic and plastic behavior after compaction. The spring back after compaction and the green strength defines to a large extent the risk for cracks. In addition, it is concluded that a standard three-point bending test is sufficient to analyze the risk for the initiation of cracks when comparing different spray-dried powders.

sted, utgiver, år, opplag, sider
MDPI AG , 2023. Vol. 13, nr 6, artikkel-id 926
Emneord [en]
pressing agent, PEG, mechanical behavior, WC-Co, cemented carbide
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-331703DOI: 10.3390/cryst13060926ISI: 001014284900001Scopus ID: 2-s2.0-85163896984OAI: oai:DiVA.org:kth-331703DiVA, id: diva2:1782471
Merknad

QC 20230714

Tilgjengelig fra: 2023-07-14 Laget: 2023-07-14 Sist oppdatert: 2024-08-28bibliografisk kontrollert

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Staf, HjalmarLarsson, Per-Lennart

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