Ambient-temperature time-dependent deformation of cast and additive manufactured Al-Cu-Mg-Ag-TiB2 (A205)

S I Shakil; A S Zoeram; M Avateffazeli; M Roscher; H Pirgazi; B Shalchi-Amirkhiz; B Poorganji; M Mohammadi; M Haghshenas

doi:10.1016/j.micron.2022.103246

Ambient-temperature time-dependent deformation of cast and additive manufactured Al-Cu-Mg-Ag-TiB₂ (A205)

Micron. 2022 May:156:103246. doi: 10.1016/j.micron.2022.103246. Epub 2022 Mar 17.

Authors

S I Shakil¹, A S Zoeram², M Avateffazeli¹, M Roscher³, H Pirgazi⁴, B Shalchi-Amirkhiz⁵, B Poorganji¹, M Mohammadi², M Haghshenas⁶

Affiliations

¹ Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH, USA.
² Marine Additive Manufacturing Centre of Excellence (MAMCE), University of New Brunswick, Fredericton, NB, Canada E3B 5A1.
³ ECKART GmbH, Güntersthal 4, 91235 Hartenstein, Germany.
⁴ Department of Electromechanical, Systems and Metal Engineering, Ghent University, Technologiepark 46, 9052 Zwijnaarde, Belgium.
⁵ Marine Additive Manufacturing Centre of Excellence (MAMCE), University of New Brunswick, Fredericton, NB, Canada E3B 5A1; CanmetMATERIALS, Natural Resources Canada, 183 Longwood Road South, Hamilton, ON, Canada L8P 0A5.
⁶ Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo, Toledo, OH, USA. Electronic address: meysam.haghshenas@utoledo.edu.

PMID: 35316740
DOI: 10.1016/j.micron.2022.103246

Abstract

A dual-stage indentation test at ambient temperature including a constant indentation load rate followed by a constant indentation load-hold segment was employed to assess the time-dependent plastic deformation of cast and additive manufactured Al-Cu-Mg-Ag-TiB₂ alloys in as-fabricated and T7 conditions at room temperature. Optical microscopy, scanning electron microscopy, electron backscattered diffraction, and transmission electron microscopy techniques were used to study the microstructure of the samples and to correlate the microstructure with the creep properties. That is, the indentation load/displacement/time data from depth-sensing indentation creep were combined with the advanced microstructural assessments to analyze the controlling mechanisms of creep in as-cast, as-built, and T7 samples. Expectedly, the microstructure of samples manufactured by different methods was substantially different in terms of the grain size and the distribution of TiB₂ particles. The θ'', θ' and Ω phase were formed in all heat-treated samples; however, the density of Ω phase was higher in the cast-T7 samples. Distinct microstructure and precipitation density resulted in different indentation-derived properties, both cast and AM samples at T7 condition showed enhanced creep resistance compared to their as-manufactured counterparts. The main controlling mechanism of creep deformation was found to be dislocation creep based on the indentation-derived creep stress exponent values.

Keywords: A205; Additive manufacturing; Heat treatment; Indentation creep; Plastic deformation.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Alloys*
Hot Temperature*
Microscopy, Electron, Scanning
Temperature

Substances

Alloys