Low temperature annealing dedicated to AlSi10Mg selective laser melting products

被引：178

作者：

Fiocchi, J. ^{[1
]}

Tuissi, A. ^{[1
]}

Bassani, P. ^{[1
]}

Biffi, C. A. ^{[1
]}

机构：

[1] CNR, ICMATE, Inst Condensed Matter Chem & Technol Energy, Unit Lecco, Cso Promessi Sposi 29, I-23900 Lecce, Italy

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 695卷

关键词：

Metals and alloys; Laser processing; Powder metallurgy; Microstructure; Calorimetry; Scanning electron microscopy; MECHANICAL-PROPERTIES; HEAT-TREATMENT; ALUMINUM-ALLOYS; MICROSTRUCTURE; PRECIPITATION; SILICON; DSC; EVOLUTION; DIFFUSION; BEHAVIOR;

D O I：

10.1016/j.jallcom.2016.12.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：3402 / 3409

页数：8

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