Publication detail

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

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

English title

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

Type

Paper in proceedings (conference paper)

Language

en

Original abstract

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.

Keywords in English

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

Released

2025-12-08

Publisher

Elsevier B.V.

Location

Nizozemí

Book

Procedia Structural Integrity

Volume

74

Number

prosinec

Pages from–to

99–105

Pages count

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"
}