Micro and nano damage observations of martensitic and austenitic open cell cast foams
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Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In current study a detailed investigation of the 304 austenitic and 420 martensitic foams damage has been carried out at all hierarchical levels. In-situ compression testing of foams and microtensile testing of single struts have been conducted in scanning electron microscope (SEM). Strain field analysis has been carried out by Digital image correlation (DIC) method. Nano damage has been applied by Nanoindentation on the unloaded and compressed foams. 304 foams depicted a ductile failure at each scale, while 420 foams failed with a tremendous brittleness, such that no real plateau regime has been observed. At microscale 420 struts ruptured with an intergranular cracking, while 304 struts underwent transformation induced plasticity (TRIP) effect with signif-icant ductility. Although 304 steel struts have higher strength, 420 steel foams exhibited a higher strength due to their high hardness. Since there is not a plastic bending of the 420 struts, load is distributed homogenously to all struts. For this reason, it was concluded that the hardness and ductility of struts are the dominating factors in the foam deformation.
Açıklama
Anahtar Kelimeler
Metal Foams, Microdamage, Nanoindentation, TRIP, Intergranular, Metal Köpükler, Mikro Hasar, Nanoindentasyon, Metallschäume, Mikrobeschädigung
Kaynak
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
WoS Q Değeri
Q1
Scopus Q Değeri
N/A
Cilt
860
Sayı
Künye
Kaya, A. C., Frömert, J., Jost, N., & Fleck, C. (2022). Micro and nano damage observations of martensitic and austenitic open cell cast foams. Materials Science and Engineering: A, 860, 144253.
