On the Influence from Pressing Agent (PEG) on the Elastic and Plastic Mechanical Behavior of Hard Metal Powder Compacts-Reference-Cited by-同舟云学术

On the Influence from Pressing Agent (PEG) on the Elastic and Plastic Mechanical Behavior of Hard Metal Powder Compacts

Published:2023-06-08 Issue:6 Volume:13 Page:926
ISSN:2073-4352
Container-title:Crystals
language:en
Short-container-title:Crystals

Author:

Staf Hjalmar¹²^ORCID,Björklund Matilda²³,Fredriksson Daniel²,Larsson Per-Lennart¹^ORCID

Affiliation:

1. Unit of Mechanics, Department of Engineering Mechanics, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden

2. Sandvik Coromant AB, R&D, SE-126 80 Stockholm, Sweden

3. Scania CV AB, SE-151 87 Södertälje, Sweden

Abstract

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.

Publisher

MDPI AG

Subject

Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering

Link

https://www.mdpi.com/2073-4352/13/6/926/pdf

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