期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 695, 期 -, 页码 3402-3409出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.12.019
关键词
Metals and alloys; Laser processing; Powder metallurgy; Microstructure; Calorimetry; Scanning electron microscopy
In this work a new heat treatment specific for selective laser melted (SLM) AlSi10Mg products is studied. Samples were analyzed by differential scanning calorimetry (DSC) and scanning electron microscopy (SEM); two exothermic phenomena were recognized, kinetically analyzed and associated to the precipitation of Mg2Si and to the rupture and spheroidization of the silicon network, which is characteristic of SLM built parts. Thermal treatments, based on the results of calorimetric analyses, were defined and applied to SLM built samples. The evolution of the silicon network morphology was confirmed by SEM observations and corresponding hardness variations were correlated to the treatment conditions. Dedicated thermal treatment is therefore proposed as a lower temperature alternative to the usually applied post - building annealing. (C) 2016 Elsevier B.V. All rights reserved.
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