Metallurgical and Materials Transactions A

, Volume 49, Issue 9, pp 3831–3837 | Cite as

Characterization of Ni-Based Superalloy Built by Selective Laser Melting and Electron Beam Melting

  • Yen-Ling KuoEmail author
  • Azusa Kamigaichi
  • Koji Kakehi
Topical Collection: Superalloys and Their Applications
Part of the following topical collections:
  1. Third European Symposium on Superalloys and their Applications


Alloy718 specimens built by selective laser melting (SLM) and electron beam melting (EBM) were comparatively examined. The higher cooling rate resulted in a high dislocation density and interdendritic precipitates, which brought about inferior creep properties in SLM alloys. However, a low dislocation density, distributed δ precipitates and a strong 〈001〉 texture were observed in the EBM material. As a result, the creep life of the direct-aged EBM specimen approached 1100 hours and was comparable to that of conventional cast-and-wrought alloys at 650 °C.



This research was supported by the Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (Grant Number JPMJAL1605) from the Japan Society for the Promotion of Science. This support is gratefully acknowledged.


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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2018

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringTokyo Metropolitan UniversityTokyoJapan

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