Effects of heat treatment on microstructure and mechanical properties of LPBF AlSi9Cu3 alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0200835" target="_blank" >RIV/00216305:26210/26:0200835 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.prostr.2025.10.040" target="_blank" >http://dx.doi.org/10.1016/j.prostr.2025.10.040</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2025.10.040" target="_blank" >10.1016/j.prostr.2025.10.040</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of heat treatment on microstructure and mechanical properties of LPBF AlSi9Cu3 alloy

Popis výsledku v původním jazyce

This study examines the effects of various heat treatments on the microstructure and mechanical properties of the AlSi9Cu3 alloy produced by laser powder bed fusion technology. In addition to conventional T6 treatment, direct aging at 160 °C (T5 treatment) and annealing at 250 °C, 300 °C, and 350 °C were applied to evaluate thermal stability and precipitation behavior. The as-built microstructure, consisting of α-Al cells surrounded by a continuous network, remained stable up to 250 °C. At 300 °C, the network disintegrated, leading to a significant hardness reduction, resembling the behavior of LPBF AlSi10Mg alloy. The LPBF AlSi9Cu3 alloy in as-built state exhibited a yield strength of 270 MPa, tensile strength of 493 MPa, and elongation of 5.6 %. Direct aging at 160 °C for 10 h promoted precipitation inside α-Al cells and improved strength to 347 MPa (YS) and 520 MPa (UTS), with elongation slightly reduced to 3.9 %. T6 treatment, despite utilizing the precipitation potential of the alloy, did not surpass the strength achieved through direct ageing, underlining the dominant role of the original cellular microstructure.

Název v anglickém jazyce

Effects of heat treatment on microstructure and mechanical properties of LPBF AlSi9Cu3 alloy

Popis výsledku anglicky

This study examines the effects of various heat treatments on the microstructure and mechanical properties of the AlSi9Cu3 alloy produced by laser powder bed fusion technology. In addition to conventional T6 treatment, direct aging at 160 °C (T5 treatment) and annealing at 250 °C, 300 °C, and 350 °C were applied to evaluate thermal stability and precipitation behavior. The as-built microstructure, consisting of α-Al cells surrounded by a continuous network, remained stable up to 250 °C. At 300 °C, the network disintegrated, leading to a significant hardness reduction, resembling the behavior of LPBF AlSi10Mg alloy. The LPBF AlSi9Cu3 alloy in as-built state exhibited a yield strength of 270 MPa, tensile strength of 493 MPa, and elongation of 5.6 %. Direct aging at 160 °C for 10 h promoted precipitation inside α-Al cells and improved strength to 347 MPa (YS) and 520 MPa (UTS), with elongation slightly reduced to 3.9 %. T6 treatment, despite utilizing the precipitation potential of the alloy, did not surpass the strength achieved through direct ageing, underlining the dominant role of the original cellular microstructure.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Procedia Structural Integrity

ISBN

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ISSN

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e-ISSN

2452-3216

Počet stran výsledku

7

Strana od-do

99-105

Název nakladatele

Elsevier B.V.

Místo vydání

Nizozemí

Místo konání akce

Brno

Datum konání akce

23. 6. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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