White papers

The primary goals in the continuing development of the aircraft gas turbine are increased operating temperatures and improved efficiencies.

A team approach involving several turbine engine companies utilizing the concepts of simultaneous engineering, has been used to successfully develop CMSX-4 alloy for turbine blade applications.

Turbine inlet temperatures over the next few years will approach 1650 C (3000 F) at maximum power for the latest large commercial turbofan engines, resulting in high fuel efficiency and thrust levels approaching 445 kN.

Alloy 718, developed by INCO in the late 1950's, is a weldable nickel base superalloy intended for use in gas turbine forged rotating disc and fabricated structural components.

Hot corrosion and long-time dynamic oxidation tests were conducted on serval alloy (equiaxed MM-0011 and IN738, SX CMSX-4, and DS CM186LC) and coating (simple aluminide, Pt-aluminide, and NiCoCrAlY).

The development concepts leading to the derivation of the CMSX series of single crystal superalloys from the MAR M 247 composition are review in rleation

The development of concepts leading to the derivation of the CMSX series of single crystal superalloys from the MAR M 247 composition are reviewed in relation to cast-ability, heat treatment, mechanical, and environmental property response.

In the highly competitive world of aero and industrial gas turbine design, manufacture and engine service, the demands imposed on engine performance are continually escalating.

In an effort toward achieving global competitiveness, most producers of advanced gas turbine power generating machines have begun to employ higher technology materials in critical engine components, thereby allowing increased turbine operating temperatures, which, in turn, lead to increased turbine efficiency.

Ni-base superalloy cast materials provide an outstanding balance of high temperature strength, fatigue resistance, oxidation resistance and coating performance and can be produced to very tight tolerances in extremely complex configurations, such as axial and centrifugal integral cast turbine wheels.