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Materials 2018, 11(1), 66; https://doi.org/10.3390/ma11010066

Effects of T2 Heat Treatment on Microstructure and Properties of the Selective Laser Melted Aluminum Alloy Samples

1,2,3,* , 2,3
,
2,3
,
2,3
,
2,3
,
2,3
and
1,*
1
School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
2
Shanghai Aerospace Equipments Manufacturer Co., Ltd., Shanghai 200245, China
3
Shanghai Research Center of Complex Metal Parts by Additive Manufacturing, Shanghai 200245, China
*
Authors to whom correspondence should be addressed.
Received: 27 November 2017 / Revised: 27 December 2017 / Accepted: 30 December 2017 / Published: 3 January 2018
(This article belongs to the Special Issue NextGen Materials for 3D Printing)
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Abstract

In this paper, aluminum alloy samples were fabricated by selective laser melting (SLM) and subsequently T2 heat treatment was undertaken. In order to obtain comprehensive results, various experiments on densification, hardness, tensile strength, bending strength and microstructure characterization were carried out. The results show that densification of samples after T2 heat treatment does not vary very much from the SLMed ones, while the Brinell hardness and strength decreases to about 50%. Moreover, the plasticity and fracture deflection increases about 3 fold. The effects on the microstructure and the mechanical properties of the SLMed aluminum alloy samples and subsequent T2 heat treatment were studied. View Full-Text
Keywords: selective laser melting; aluminum alloy; T2 heat treatment selective laser melting; aluminum alloy; T2 heat treatment
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Wang, L.; Sun, J.; Zhu, X.; Cheng, L.; Shi, Y.; Guo, L.; Yan, B. Effects of T2 Heat Treatment on Microstructure and Properties of the Selective Laser Melted Aluminum Alloy Samples. Materials 2018, 11, 66.

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