Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting

Pei Wang; Christoph Gammer; Florian Brenne; Konda Gokuldoss Prashanth; Rafael Gregorio Mendes; Mark Hermann Rümmeli; Thomas Gemming; Jürgen Eckert; Sergio Scudino

doi:10.1016/j.msea.2017.11.063

Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting

Pei Wang^*
, Christoph Gammer
, Florian Brenne
, Konda Gokuldoss Prashanth
, Rafael Gregorio Mendes
, Mark Hermann Rümmeli
, Thomas Gemming
, Jürgen Eckert
, Sergio Scudino

^*Corresponding author for this work

extern

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

A heat-treatable Al-3.5Cu-1.5Mg-1Si alloy is successfully fabricated by selective laser melting and is investigated concerning microstructures and mechanical properties. The as-prepared samples show a fine-granular microstructure in the individual melt pool of the tracks and a coarse-granular microstructure in the areas between the tracks. After T6 heat treatment, the grain size of the specimens increases slightly and the Q phase formed in the as-prepared specimens transforms to Al2Cu(Mg), Mg2Si, and AlxMny. All Al-Cu-Mg-Si specimens before and after heat treatment fracture around the defects that were generated during processing and show intergranular fracture along columnar grains upon tensile quasi-static loading. The as-fabricated samples exhibit a yield strength (YS) of 223 ± 4 MPa and an ultimate tensile strength (UTS) of 366 ± 7 MPa with an elongation of 5.3 ± 0.3%. After T6 heat treatment, the YS and UTS increase dramatically to 368 ± 6 MPa and 455 ± 10 MPa due to the formation of nano-sized Al2Cu(Mg) precipitates, while the ductility remains fairly similar.

Original language	English
Pages (from-to)	562-570
Number of pages	9
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	711
DOIs	https://doi.org/10.1016/j.msea.2017.11.063
Publication status	Published - 10 Jan 2018

Keywords

Al-Cu-Mg-Si alloy
Heat treatment
Mechanical properties
Microstructure
Selective laser melting

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10.1016/j.msea.2017.11.063

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Wang, P., Gammer, C., Brenne, F., Prashanth, K. G., Mendes, R. G., Rümmeli, M. H., Gemming, T., Eckert, J., & Scudino, S. (2018). Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 711, 562-570. https://doi.org/10.1016/j.msea.2017.11.063

@article{45e3f3b15bab4ff4a48401dd14f5c403,

title = "Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting",

abstract = "A heat-treatable Al-3.5Cu-1.5Mg-1Si alloy is successfully fabricated by selective laser melting and is investigated concerning microstructures and mechanical properties. The as-prepared samples show a fine-granular microstructure in the individual melt pool of the tracks and a coarse-granular microstructure in the areas between the tracks. After T6 heat treatment, the grain size of the specimens increases slightly and the Q phase formed in the as-prepared specimens transforms to Al2Cu(Mg), Mg2Si, and AlxMny. All Al-Cu-Mg-Si specimens before and after heat treatment fracture around the defects that were generated during processing and show intergranular fracture along columnar grains upon tensile quasi-static loading. The as-fabricated samples exhibit a yield strength (YS) of 223 ± 4 MPa and an ultimate tensile strength (UTS) of 366 ± 7 MPa with an elongation of 5.3 ± 0.3\%. After T6 heat treatment, the YS and UTS increase dramatically to 368 ± 6 MPa and 455 ± 10 MPa due to the formation of nano-sized Al2Cu(Mg) precipitates, while the ductility remains fairly similar.",

keywords = "Al-Cu-Mg-Si alloy, Heat treatment, Mechanical properties, Microstructure, Selective laser melting",

author = "Pei Wang and Christoph Gammer and Florian Brenne and Prashanth, \{Konda Gokuldoss\} and Mendes, \{Rafael Gregorio\} and R{\"u}mmeli, \{Mark Hermann\} and Thomas Gemming and J{\"u}rgen Eckert and Sergio Scudino",

year = "2018",

month = jan,

day = "10",

doi = "10.1016/j.msea.2017.11.063",

language = "English",

volume = "711",

pages = "562--570",

journal = "Materials Science \& Engineering A: Structural Materials: Properties, Microstructure and Processing",

issn = "0921-5093",

publisher = "Elsevier Ltd",

}

Wang, P, Gammer, C, Brenne, F, Prashanth, KG, Mendes, RG, Rümmeli, MH, Gemming, T, Eckert, J & Scudino, S 2018, 'Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting', Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, vol. 711, pp. 562-570. https://doi.org/10.1016/j.msea.2017.11.063

Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting. / Wang, Pei; Gammer, Christoph; Brenne, Florian et al.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 711, 10.01.2018, p. 562-570.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting

AU - Wang, Pei

AU - Gammer, Christoph

AU - Brenne, Florian

AU - Prashanth, Konda Gokuldoss

AU - Mendes, Rafael Gregorio

AU - Rümmeli, Mark Hermann

AU - Gemming, Thomas

AU - Eckert, Jürgen

AU - Scudino, Sergio

PY - 2018/1/10

Y1 - 2018/1/10

N2 - A heat-treatable Al-3.5Cu-1.5Mg-1Si alloy is successfully fabricated by selective laser melting and is investigated concerning microstructures and mechanical properties. The as-prepared samples show a fine-granular microstructure in the individual melt pool of the tracks and a coarse-granular microstructure in the areas between the tracks. After T6 heat treatment, the grain size of the specimens increases slightly and the Q phase formed in the as-prepared specimens transforms to Al2Cu(Mg), Mg2Si, and AlxMny. All Al-Cu-Mg-Si specimens before and after heat treatment fracture around the defects that were generated during processing and show intergranular fracture along columnar grains upon tensile quasi-static loading. The as-fabricated samples exhibit a yield strength (YS) of 223 ± 4 MPa and an ultimate tensile strength (UTS) of 366 ± 7 MPa with an elongation of 5.3 ± 0.3%. After T6 heat treatment, the YS and UTS increase dramatically to 368 ± 6 MPa and 455 ± 10 MPa due to the formation of nano-sized Al2Cu(Mg) precipitates, while the ductility remains fairly similar.

AB - A heat-treatable Al-3.5Cu-1.5Mg-1Si alloy is successfully fabricated by selective laser melting and is investigated concerning microstructures and mechanical properties. The as-prepared samples show a fine-granular microstructure in the individual melt pool of the tracks and a coarse-granular microstructure in the areas between the tracks. After T6 heat treatment, the grain size of the specimens increases slightly and the Q phase formed in the as-prepared specimens transforms to Al2Cu(Mg), Mg2Si, and AlxMny. All Al-Cu-Mg-Si specimens before and after heat treatment fracture around the defects that were generated during processing and show intergranular fracture along columnar grains upon tensile quasi-static loading. The as-fabricated samples exhibit a yield strength (YS) of 223 ± 4 MPa and an ultimate tensile strength (UTS) of 366 ± 7 MPa with an elongation of 5.3 ± 0.3%. After T6 heat treatment, the YS and UTS increase dramatically to 368 ± 6 MPa and 455 ± 10 MPa due to the formation of nano-sized Al2Cu(Mg) precipitates, while the ductility remains fairly similar.

KW - Al-Cu-Mg-Si alloy

KW - Heat treatment

KW - Mechanical properties

KW - Microstructure

KW - Selective laser melting

UR - https://www.mendeley.com/catalogue/983f350e-267f-3a67-a17c-168089738926/

U2 - 10.1016/j.msea.2017.11.063

DO - 10.1016/j.msea.2017.11.063

M3 - Article

SN - 0921-5093

VL - 711

SP - 562

EP - 570

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

ER -

Microstructure and mechanical properties of a heat-treatable Al-3.5Cu-1.5Mg-1Si alloy produced by selective laser melting

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