Micromechanisms of Deformation and Fracture in Porous L-PBF 316L Stainless Steel at Different Strain Rates
The process of an unstable plastic flow associated with the strain rate sensitivity of mechanical properties was studied in porous 316L austenitic steel samples manufactured by laser powder bed fusion (L-PBF). Different micromechanisms of deformation and fracture of porous samples dependent on strai...
Guardado en:
| Autores principales: | , , , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/9afc122180a448fabe775a0a22878c99 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| id |
oai:doaj.org-article:9afc122180a448fabe775a0a22878c99 |
|---|---|
| record_format |
dspace |
| spelling |
oai:doaj.org-article:9afc122180a448fabe775a0a22878c992021-11-25T18:22:33ZMicromechanisms of Deformation and Fracture in Porous L-PBF 316L Stainless Steel at Different Strain Rates10.3390/met111118702075-4701https://doaj.org/article/9afc122180a448fabe775a0a22878c992021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1870https://doaj.org/toc/2075-4701The process of an unstable plastic flow associated with the strain rate sensitivity of mechanical properties was studied in porous 316L austenitic steel samples manufactured by laser powder bed fusion (L-PBF). Different micromechanisms of deformation and fracture of porous samples dependent on strain rate were found. It was found that despite the porosity, the specimens showed high strength, which increased with the loading rate. Porosity led to lower ductility of the studied specimens, in comparison with literature data for low porous 316L L-PBF samples and resulted in de-localization of plastic deformation. With an increase in strain rate, nucleation of new pores was less pronounced, so that at the highest strain rate of 8 × 10<sup>−3</sup> s<sup>−1</sup>, only pore coalescence was observed as the dominating microscopic mechanism of ductile fracture.Nataliya KazantsevaPavel KrakhmalevMikael ÅsbergYulia KoemetsMaxim KarabanalovDenis DavydovIgor EzhovOlga KoemetsMDPI AGarticleadditive manufacturingpowder bed fusionstainless steelporositydeformationMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1870, p 1870 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
additive manufacturing powder bed fusion stainless steel porosity deformation Mining engineering. Metallurgy TN1-997 |
| spellingShingle |
additive manufacturing powder bed fusion stainless steel porosity deformation Mining engineering. Metallurgy TN1-997 Nataliya Kazantseva Pavel Krakhmalev Mikael Åsberg Yulia Koemets Maxim Karabanalov Denis Davydov Igor Ezhov Olga Koemets Micromechanisms of Deformation and Fracture in Porous L-PBF 316L Stainless Steel at Different Strain Rates |
| description |
The process of an unstable plastic flow associated with the strain rate sensitivity of mechanical properties was studied in porous 316L austenitic steel samples manufactured by laser powder bed fusion (L-PBF). Different micromechanisms of deformation and fracture of porous samples dependent on strain rate were found. It was found that despite the porosity, the specimens showed high strength, which increased with the loading rate. Porosity led to lower ductility of the studied specimens, in comparison with literature data for low porous 316L L-PBF samples and resulted in de-localization of plastic deformation. With an increase in strain rate, nucleation of new pores was less pronounced, so that at the highest strain rate of 8 × 10<sup>−3</sup> s<sup>−1</sup>, only pore coalescence was observed as the dominating microscopic mechanism of ductile fracture. |
| format |
article |
| author |
Nataliya Kazantseva Pavel Krakhmalev Mikael Åsberg Yulia Koemets Maxim Karabanalov Denis Davydov Igor Ezhov Olga Koemets |
| author_facet |
Nataliya Kazantseva Pavel Krakhmalev Mikael Åsberg Yulia Koemets Maxim Karabanalov Denis Davydov Igor Ezhov Olga Koemets |
| author_sort |
Nataliya Kazantseva |
| title |
Micromechanisms of Deformation and Fracture in Porous L-PBF 316L Stainless Steel at Different Strain Rates |
| title_short |
Micromechanisms of Deformation and Fracture in Porous L-PBF 316L Stainless Steel at Different Strain Rates |
| title_full |
Micromechanisms of Deformation and Fracture in Porous L-PBF 316L Stainless Steel at Different Strain Rates |
| title_fullStr |
Micromechanisms of Deformation and Fracture in Porous L-PBF 316L Stainless Steel at Different Strain Rates |
| title_full_unstemmed |
Micromechanisms of Deformation and Fracture in Porous L-PBF 316L Stainless Steel at Different Strain Rates |
| title_sort |
micromechanisms of deformation and fracture in porous l-pbf 316l stainless steel at different strain rates |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/9afc122180a448fabe775a0a22878c99 |
| work_keys_str_mv |
AT nataliyakazantseva micromechanismsofdeformationandfractureinporouslpbf316lstainlesssteelatdifferentstrainrates AT pavelkrakhmalev micromechanismsofdeformationandfractureinporouslpbf316lstainlesssteelatdifferentstrainrates AT mikaelasberg micromechanismsofdeformationandfractureinporouslpbf316lstainlesssteelatdifferentstrainrates AT yuliakoemets micromechanismsofdeformationandfractureinporouslpbf316lstainlesssteelatdifferentstrainrates AT maximkarabanalov micromechanismsofdeformationandfractureinporouslpbf316lstainlesssteelatdifferentstrainrates AT denisdavydov micromechanismsofdeformationandfractureinporouslpbf316lstainlesssteelatdifferentstrainrates AT igorezhov micromechanismsofdeformationandfractureinporouslpbf316lstainlesssteelatdifferentstrainrates AT olgakoemets micromechanismsofdeformationandfractureinporouslpbf316lstainlesssteelatdifferentstrainrates |
| _version_ |
1718411274180624384 |