A Review on Sintered Nickel based Alloys

• Published in: Lecture notes in engineering and computer science Vol. 2229/2230; p. 922
• Main Authors: Makena, Isaac M, Shongwe, Mxolisi B, Ramakokovhu, Munyadziwa M, Lethabane, Moipone L
• Format: Journal Article
• Language: English
• Published: Hong Kong International Association of Engineers 05.07.2017
• Subjects: Aircraft engines; Alloy powders; Alloying elements; Dispersion hardening; Gas turbine engines; High temperature; Ingot casting; Machining; Marine engines; Marine propulsion; Nickel base alloys; Nuclear power plants; Nuclear reactors; Powder metallurgy; Power plants; Precipitation hardening; Segregations; Sintering (powder metallurgy); Solid solutions; Solution strengthening; Steam electric power generation; Superalloys; Surface stability
• ISSN: 2078-0958; 2078-0966

This paper presents a review on sintered nickel based alloys. Nickel-based superalloys are an unusual group of metallic materials, showing an extraordinary combination of high temperature strength, toughness and surface stability in corrosive or oxidative environment. Therefore, these alloys play an extremely important role in gas turbine engines, aircraft, marine, nuclear reactors, steam power plants, petrochemical equipment and other high-temperature applications. Their resistance to temperature is achieved through a mixture of dispersion hardening, precipitation hardening and solid solution strengthening. To overcome or reduce probability of segregations, difficulties of forming and machining, often associated with or present in cast ingots, powder metallurgy has been of great consideration recently. In addition, powder metallurgy enables the alloying with refractory elements for high temperature strength.