Microstructural characterization and mechanical behaviour of laser powder Bed Fusion stainless steel 316L

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F24%3A00583696" target="_blank" >RIV/68081723:_____/24:00583696 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0167844224000922?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0167844224000922?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tafmec.2024.104343" target="_blank" >10.1016/j.tafmec.2024.104343</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructural characterization and mechanical behaviour of laser powder Bed Fusion stainless steel 316L

Popis výsledku v původním jazyce

Laser Powder Bed Fusion (L-PBF) is a highly precise and customizable additive manufacturing (AM) technique nthat uses a high-energy laser to selectively melt and fuse powdered material into a three-dimensional object. nHowever, depending on the process parameters, the final components may have potential flaws that can affect ntheir quality and mechanical properties, due to porosity, melting and incomplete fusion of powder particles and nbecause the process involves local heating and sometimes uneven heat transfer, the processed components may nwarp or crack due to residual stresses or thermal gradients. The manufacturing process itself reflects in the final ncomponent structure having a detrimental effect on the strength, durability, fatigue resistance, and corrosion. nIn this work, static tensile and fatigue tests were performed on traditional and L-PBF manufactured AISI 316L nstainless steel specimens. The energetic release has been evaluated with an infrared camera during the static and nfatigue tests aiming to identify material thermal response to the loading and to predict the failure in rapid way nadopting Thermographic Methods. Differences were observed comparing the fatigue data of the L-PBF processed nspecimens with the traditional material. However, analysis of internal structure, porosity, and surface characteristics of the AM material in combination with fractographic analysis helped to explain the differences in the fatigue life. The observed energy release, different for both material types, was discussed based on the structural characteristics. The results show that the crack originates from a defect on the surface or just below the surface, with a transgranular propagation.

Název v anglickém jazyce

Microstructural characterization and mechanical behaviour of laser powder Bed Fusion stainless steel 316L

Popis výsledku anglicky

Laser Powder Bed Fusion (L-PBF) is a highly precise and customizable additive manufacturing (AM) technique nthat uses a high-energy laser to selectively melt and fuse powdered material into a three-dimensional object. nHowever, depending on the process parameters, the final components may have potential flaws that can affect ntheir quality and mechanical properties, due to porosity, melting and incomplete fusion of powder particles and nbecause the process involves local heating and sometimes uneven heat transfer, the processed components may nwarp or crack due to residual stresses or thermal gradients. The manufacturing process itself reflects in the final ncomponent structure having a detrimental effect on the strength, durability, fatigue resistance, and corrosion. nIn this work, static tensile and fatigue tests were performed on traditional and L-PBF manufactured AISI 316L nstainless steel specimens. The energetic release has been evaluated with an infrared camera during the static and nfatigue tests aiming to identify material thermal response to the loading and to predict the failure in rapid way nadopting Thermographic Methods. Differences were observed comparing the fatigue data of the L-PBF processed nspecimens with the traditional material. However, analysis of internal structure, porosity, and surface characteristics of the AM material in combination with fractographic analysis helped to explain the differences in the fatigue life. The observed energy release, different for both material types, was discussed based on the structural characteristics. The results show that the crack originates from a defect on the surface or just below the surface, with a transgranular propagation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Theoretical and Applied Fracture Mechanics

ISSN

0167-8442

e-ISSN

1872-7638

Svazek periodika

131

Číslo periodika v rámci svazku

Jun

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

104343

Kód UT WoS článku

001221917800001

EID výsledku v databázi Scopus

2-s2.0-85186632614