Open AccessProduction of Diesel Engine Turbocharger Turbine from Low Cost Titanium Powder
Author(s) -
Thomas R. Muth,
R. M. Mayer
Publication year - 2012
Language(s) - English
Resource type - Reports
DOI - 10.2172/1040848
Subject(s) - turbocharger , turbine , titanium , diesel fuel , gas compressor , automotive engineering , diesel engine , superalloy , materials science , titanium alloy , rotor (electric) , metallurgy , mechanical engineering , engineering , alloy
Turbochargers in commercial turbo-diesel engines are multi-material systems where usually the compressor rotor is made of aluminum or titanium based material and the turbine rotor is made of either a nickel based superalloy or titanium, designed to operate under the harsh exhaust gas conditions. The use of cast titanium in the turbine section has been used by Cummins Turbo Technologies since 1997. Having the benefit of a lower mass than the superalloy based turbines; higher turbine speeds in a more compact design can be achieved with titanium. In an effort to improve the cost model, and develop an industrial supply of titanium componentry that is more stable than the traditional aerospace based supply chain, the Contractor has developed component manufacturing schemes that use economical Armstrong titanium and titanium alloy powders and MgR-HDH powders. Those manufacturing schemes can be applied to compressor and turbine rotor components for diesel engine applications with the potential of providing a reliable supply of titanium componentry with a cost and performance advantage over cast titanium