Low-cycle fatigue of laser powder bed fusion-processed AlSi10Mg using recycled powder: Experiments and machine learning-assisted lifetime prediction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00619086" target="_blank" >RIV/68081723:_____/25:00619086 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/25:00384526

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0264127525003466?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0264127525003466?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matdes.2025.113926" target="_blank" >10.1016/j.matdes.2025.113926</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Low-cycle fatigue of laser powder bed fusion-processed AlSi10Mg using recycled powder: Experiments and machine learning-assisted lifetime prediction

Popis výsledku v původním jazyce

As additive manufacturing technologies advance, the increased use of recycled powder feedstock becomes inevitable. However, recycling may compromise the purity and quality of material inputs, potentially leading to inferior component properties. In this study, strain-controlled Low-Cycle Fatigue (LCF) tests were performed on laser powder bed fusion-processed AlSi10Mg using recycled powder. The use of recycled powder led to an increased oxygen content, resulting in more pores in the microstructure. The LCF tests covered various strain amplitudes under tension-compression for both horizontally and vertically built specimens. After the initial softening, the cyclic response stabilized, with the Hall-Petch effect identified as the main strengthening mechanism due to the eutectic cell walls, regardless of build direction. Investigations into the damage mechanisms revealed deposition defects as the main factor influencing transgranular crack initiation and propagation. Horizontally built specimens exhibited shorter fatigue lifetimes due to a higher number of deposition defects apparently caused by their positions on the build platform. A physics-informed neural network, combined with a strain-life approach, was proposed to predict the fatigue lifetime of small datasets and account for the damaging effects of deposition-related defects. The predicted data showed a good correlation with the experimental results.

Název v anglickém jazyce

Low-cycle fatigue of laser powder bed fusion-processed AlSi10Mg using recycled powder: Experiments and machine learning-assisted lifetime prediction

Popis výsledku anglicky

As additive manufacturing technologies advance, the increased use of recycled powder feedstock becomes inevitable. However, recycling may compromise the purity and quality of material inputs, potentially leading to inferior component properties. In this study, strain-controlled Low-Cycle Fatigue (LCF) tests were performed on laser powder bed fusion-processed AlSi10Mg using recycled powder. The use of recycled powder led to an increased oxygen content, resulting in more pores in the microstructure. The LCF tests covered various strain amplitudes under tension-compression for both horizontally and vertically built specimens. After the initial softening, the cyclic response stabilized, with the Hall-Petch effect identified as the main strengthening mechanism due to the eutectic cell walls, regardless of build direction. Investigations into the damage mechanisms revealed deposition defects as the main factor influencing transgranular crack initiation and propagation. Horizontally built specimens exhibited shorter fatigue lifetimes due to a higher number of deposition defects apparently caused by their positions on the build platform. A physics-informed neural network, combined with a strain-life approach, was proposed to predict the fatigue lifetime of small datasets and account for the damaging effects of deposition-related defects. The predicted data showed a good correlation with the experimental results.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/EH22_008%2F0004634" target="_blank" >EH22_008/0004634: Strojní inženýrství biologických a bioinspirovaných systémů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Materials and Design

ISSN

0264-1275

e-ISSN

1873-4197

Svazek periodika

253

Číslo periodika v rámci svazku

MAY

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

19

Strana od-do

113926

Kód UT WoS článku

001476787500001

EID výsledku v databázi Scopus

2-s2.0-105002634887