Innovative technologies for powder metallurgy-based disk superalloys: Progress and proposal

doi:10.1088/1674-1056/25/2/026103

Abstract

Powder metallurgy (PM) superalloys are an important class of high temperature structural materials, key to the rotating components of aero engines. In the purview of the present challenges associated with PM superalloys, two novel approaches namely, powder preparation and the innovative spray-forming technique (for making turbine disk) are proposed and studied. Subsequently, advanced technologies like electrode-induction-melting gas atomization (EIGA), and spark-plasma discharge spheroidization (SPDS) are introduced, for ceramic-free superalloy powders. Presently, new processing routes are sought after for preparing finer and cleaner raw powders for disk superalloys. The progress of research in spray-formed PM superalloys is first summarized in detail. The spray-formed superalloy disks specifically exhibit excellent mechanical properties. This paper reviews the recent progress in innovative technologies for PM superalloys, with an emphasis on new ideas and approaches, central to the innovation driving techniques like powder processing and spray forming.

Keywords: PM superalloy innovative technology powder preparation spray forming

Received: 27 September 2015
Revised: 06 November 2015
Accepted manuscript online:

PACS:	61.43.Gt	(Powders, porous materials)
	61.66.Dk	(Alloys )
	62.20.-x	(Mechanical properties of solids)
	47.85.M-	(Material processing flows; industrial applications)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 50974016 and 50071014).

Corresponding Authors: Chang-Chun Ge
E-mail: ccge@mater.ustb.edu.cn

Cite this article:

Chong-Lin Jia(贾崇林), Chang-Chun Ge(葛昌纯), Qing-Zhi Yan(燕青芝) Innovative technologies for powder metallurgy-based disk superalloys: Progress and proposal 2016 Chin. Phys. B 25 026103

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[1]	Spray forming and mechanical properties of a new type powder metallurgy superalloy Jia Chong-Lin (贾崇林), Ge Chang-Chun (葛昌纯), Xia Min (夏敏), Gu Tian-Fu (谷天赋). Chin. Phys. B, 2015, 24(11): 118107.

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