Effect of Process and Post-Process Conditions on the Mechanical Properties of an A357 Alloy Produced via Laser Powder Bed Fusion

Metals

Flaviana Calignano¹  Francesco Trevisan¹  Massimo Lorusso¹  Elisa Paola Ambrosio¹  Diego Manfredi¹  Paolo Fino²  Alberta Aversa²  Sara Biamino²  Mariangela Lombardi²  Matteo Pavese² 

[1] Center for Sustainable Future Technologies—CSFT@POLITO, Istituto Italiano di Tecnologia, Corso Trento 21, 10129 Torino, Italy;Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;

关键词: additive manufacturing;    aluminum;    laser powder bed fusion;    A357;    mechanical properties;    preheating;    platform temperature;    ageing;    cooling rate;    selective laser melting;   

DOI  :  10.3390/met7020068

来源: DOAJ

【 摘 要 】

A357 samples were realized by laser powder bed fusion (LPBF) on building platforms heated up to different temperatures. The effect of the preheating temperature and of the post processing heat treatment on the microstructure and the mechanical properties of the samples was studied. It was demonstrated that building platform heating can act as an in situ ageing heat treatment following the fast cooling that arises during laser scanning. A 17% higher ultimate tensile strength was achieved by the selection of the optimum building platform temperature. Moreover, the possibility to further increase the mechanical properties by means of a direct ageing heat treatment was investigated.

【 授权许可】

Unknown