Publication detail

Processing of High Strength Al-Cu alloy Using 400W Selective Laser Melting – Initial Study

KOUTNÝ, D. PALOUŠEK, D. KOUKAL, O. ZIKMUND, T. PANTĚLEJEV, L. DOKOUPIL, F.

Original Title

Processing of High Strength Al-Cu alloy Using 400W Selective Laser Melting – Initial Study

English Title

Processing of High Strength Al-Cu alloy Using 400W Selective Laser Melting – Initial Study

Type

conference paper

Language

en

Original Abstract

The proposed paper deals with development of production parameters of high strength Aluminium (Al–Cu–Mg–Fe–Ni) alloy using 400W selective laser melting system. The AW2618 high-strength aluminium alloy is typically used in aerospace and military components, engine pistons, parts of turbochargers due to its ability to work in higher temperature applications. The advantage is the stability of mechanical properties after heating even over 100 °C due to the Ni and Fe content. Due to high energy input of SLM, high heating and cooling rates are induced during the melting/solidification process which gives the ability to process this typically difficult to weld material. First stage of experiments with different values of laser power (LP) and laser scanning speed (LS) were conducted to describe the processing window. Single track scans (STS) with LP 100-400W and LS 200-1400mm/s were processed to find the optimal energy density for Al-Cu alloy. Layer thickness and other parameters stayed unchanged. Continuity and quality of STS were analyzed with non-contact 3D optical profilometer. Second stage of experiments was aimed on processing of multiple layers and homogeneity of the material. The μCT scanning of the samples was used in order to obtain qualitative and quantitative information about the sample porosity. Results show, that with the higher laser power (400W) a relative density higher than 99% can be reached, however with large amount of cracks. To reach the fully dense material free of cracks further experiments are necessary.

English abstract

The proposed paper deals with development of production parameters of high strength Aluminium (Al–Cu–Mg–Fe–Ni) alloy using 400W selective laser melting system. The AW2618 high-strength aluminium alloy is typically used in aerospace and military components, engine pistons, parts of turbochargers due to its ability to work in higher temperature applications. The advantage is the stability of mechanical properties after heating even over 100 °C due to the Ni and Fe content. Due to high energy input of SLM, high heating and cooling rates are induced during the melting/solidification process which gives the ability to process this typically difficult to weld material. First stage of experiments with different values of laser power (LP) and laser scanning speed (LS) were conducted to describe the processing window. Single track scans (STS) with LP 100-400W and LS 200-1400mm/s were processed to find the optimal energy density for Al-Cu alloy. Layer thickness and other parameters stayed unchanged. Continuity and quality of STS were analyzed with non-contact 3D optical profilometer. Second stage of experiments was aimed on processing of multiple layers and homogeneity of the material. The μCT scanning of the samples was used in order to obtain qualitative and quantitative information about the sample porosity. Results show, that with the higher laser power (400W) a relative density higher than 99% can be reached, however with large amount of cracks. To reach the fully dense material free of cracks further experiments are necessary.

Keywords

2618 alloy; aluminiun alloy; selective laser melting

Released

22.06.2015

Publisher

German Scientific Laser Society

Location

Bochum

Pages from

1

Pages to

11

Pages count

11

URL

BibTex


@inproceedings{BUT115542,
  author="Daniel {Koutný} and David {Paloušek} and Ondřej {Koukal} and Tomáš {Zikmund} and Libor {Pantělejev} and Filip {Dokoupil}",
  title="Processing of High Strength Al-Cu alloy Using 400W Selective Laser Melting – Initial Study",
  annote="The proposed paper deals with development of production parameters of high strength Aluminium (Al–Cu–Mg–Fe–Ni) alloy using 400W selective laser melting system. The AW2618 high-strength aluminium alloy is typically used in aerospace and military components, engine pistons, parts of turbochargers due to its ability to work in higher temperature applications. The advantage is the stability of mechanical properties after heating even over 100 °C due to the Ni and Fe content. Due to high energy input of SLM, high heating and cooling rates are induced during the melting/solidification process which gives the ability to process this typically difficult to weld material. First stage of experiments with different values of laser power (LP) and laser scanning speed (LS) were conducted to describe the processing window. Single track scans (STS) with LP 100-400W and LS 200-1400mm/s were processed to find the optimal energy density for Al-Cu alloy. Layer thickness and other parameters stayed unchanged. Continuity and quality of STS were analyzed with non-contact 3D optical profilometer. Second stage of experiments was aimed on processing of multiple layers and homogeneity of the material. The μCT scanning of the samples was used in order to obtain qualitative and quantitative information about the sample porosity. Results show, that with the higher laser power (400W) a relative density higher than 99% can be reached, however with large amount of cracks. To reach the fully dense material free of cracks further experiments are necessary.",
  address="German Scientific Laser Society",
  booktitle="Lasers in Manufacturing 2015 Proceedings",
  chapter="115542",
  howpublished="online",
  institution="German Scientific Laser Society",
  year="2015",
  month="june",
  pages="1--11",
  publisher="German Scientific Laser Society",
  type="conference paper"
}