TY - JOUR

T1 - Experimental investigation of temperature distribution during wire-based laser metal deposition of the Al-Mg alloy 5087

AU - Frönd, Martin

AU - Bock, Frederic E.

AU - Riekehr, Stefan

AU - Kashaev, Nikolai

AU - Klusemann, Benjamin

AU - Enz, Josephin

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Wire-based laser metal deposition enables to manufacture large-scale components with deposition rates significant higher compared to powder-based laser additive manufacturing techniques, which are currently working with deposition rates of only a few hundred gram per hour. However, the wire-based approach requires a significant amount of laser power in the range of several kilowatts instead of only a few hundred watts for powder-based processes. This excessive heat input during laser metal deposition can lead to process instabilities such as a non-uniform material deposition and to a limited processability, respectively. Although, numerous possibilities to monitor temperature evolution during processing exist, there is still a lack of knowledge regarding the relationship between temperature and geometric shape of the deposited structure. Due to changing cooling conditions with increasing distance to the substrate material, producing a wall-like structure results in varying heights of the individual tracks. This presents challenges for the deposition of high wall-like structures and limits the use of constant process parameters. In the present study, the temperature evolution during laser metal deposition of AA5087 using constant process parameters is investigated and a scheme for process parameter adaptions in order to reduce residual stress induced componential distortions is suggested.

AB - Wire-based laser metal deposition enables to manufacture large-scale components with deposition rates significant higher compared to powder-based laser additive manufacturing techniques, which are currently working with deposition rates of only a few hundred gram per hour. However, the wire-based approach requires a significant amount of laser power in the range of several kilowatts instead of only a few hundred watts for powder-based processes. This excessive heat input during laser metal deposition can lead to process instabilities such as a non-uniform material deposition and to a limited processability, respectively. Although, numerous possibilities to monitor temperature evolution during processing exist, there is still a lack of knowledge regarding the relationship between temperature and geometric shape of the deposited structure. Due to changing cooling conditions with increasing distance to the substrate material, producing a wall-like structure results in varying heights of the individual tracks. This presents challenges for the deposition of high wall-like structures and limits the use of constant process parameters. In the present study, the temperature evolution during laser metal deposition of AA5087 using constant process parameters is investigated and a scheme for process parameter adaptions in order to reduce residual stress induced componential distortions is suggested.

KW - Engineering

KW - Additive manufacturing technology

KW - aluminium alloy

KW - laser metal deposition

KW - Aluminium alloy

KW - Laser Additive Manufacturing

KW - laser metal deposition

KW - Process Parameters

KW - Temperature Evolution

U2 - 10.4028/www.scientific.net/MSF.941.988

DO - 10.4028/www.scientific.net/MSF.941.988

M3 - Conference article in journal

VL - 941

SP - 988

EP - 994

JO - Materials Science Forum

JF - Materials Science Forum

SN - 0255-5476

T2 - International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS - THERMEC 2018

Y2 - 8 July 2018 through 13 July 2018

ER -