Detail publikačního výsledku

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

VAŠÁKOVÁ, K.; JUDAS, J.; ČUPERA, J.; PANTĚLEJEV, L.; KOUTNÝ, D.

Originální název

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

Anglický název

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

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

AlSi9Cu3 alloy | heat treatment | Laser powder bed fusion technology | mechanical properties | microstructure

Klíčová slova v angličtině

AlSi9Cu3 alloy | heat treatment | Laser powder bed fusion technology | mechanical properties | microstructure

Autoři

VAŠÁKOVÁ, K.; JUDAS, J.; ČUPERA, J.; PANTĚLEJEV, L.; KOUTNÝ, D.

Vydáno

08.12.2025

Nakladatel

Elsevier B.V.

Místo

Nizozemí

Kniha

Procedia Structural Integrity

Periodikum

Procedia Structural Integrity

Svazek

74

Číslo

prosinec

Stát

Nizozemsko

Strany od

99

Strany do

105

Strany počet

7

BibTex

@inproceedings{BUT200835,
  author="Kristýna {Vašáková} and Jakub {Judas} and Jan {Čupera} and Libor {Pantělejev} and Daniel {Koutný}",
  title="Effects of heat treatment on microstructure and mechanical properties of LPBF AlSi9Cu3 alloy",
  booktitle="Procedia Structural Integrity",
  year="2025",
  journal="Procedia Structural Integrity",
  volume="74",
  number="prosinec",
  pages="99--105",
  publisher="Elsevier B.V.",
  address="Nizozemí",
  doi="10.1016/j.prostr.2025.10.040"
}