Journal article
(Original article)


Microstructure of the Nickel-Base Superalloy CMSX-4 Fabricated by Selective Electron Beam Melting


Publication Details
Author(s): Ramsperger M, Singer R, Körner C
Publisher: ASM International
Publication year: 2016
Volume: 47
Journal issue: 3
Pages range: 1469-1480
ISSN: 1073-5623

Abstract

Powder bed-based additive manufacturing (AM) processes are characterized by very high-temperature gradients and solidification rates. These conditions lead to microstructures orders of magnitude smaller than in conventional casting processes. Especially in the field of high performance alloys, like nickel-base superalloys, this opens new opportunities for homogenization and alloy development. Nevertheless, the high susceptibility to cracking of precipitation-hardenable superalloys is a challenge for AM. In this study, electron beam-based AM is used to fabricate samples from gas-atomized pre-alloyed CMSX-4 powder. The influence of the processing strategy on crack formation is investigated. The samples are characterized by optical and SEM microscopy and analyzed by microprobe analysis. Differential scanning calorimetry is used to demonstrate the effect of the fine microstructure on characteristic temperatures. In addition, in situ heat treatment effects are investigated.



How to cite
APA: Ramsperger, M., Singer, R., & Körner, C. (2016). Microstructure of the Nickel-Base Superalloy CMSX-4 Fabricated by Selective Electron Beam Melting. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 47(3), 1469-1480. https://dx.doi.org/10.1007/s11661-015-3300-y

MLA: Ramsperger, Markus, Robert Singer, and Carolin Körner. "Microstructure of the Nickel-Base Superalloy CMSX-4 Fabricated by Selective Electron Beam Melting." Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 47.3 (2016): 1469-1480.

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