Influence of temperature and strain rate during rolling of rené 65 bar

Abstract

The requirements for rotating jet engine components have placed increasing demands on materials suppliers in the aerospace industry. Higher temperature demands of blade and rotor disk applications in the compressor section have led to a need for alloys with properties superior to ATI 718Plus® ™ while retaining the ability to be processed by the conventional cast plus wrought process. René 65 was developed for rotor disk applications. The alloy’s property capability also makes it an excellent candidate for compressor blade applications. Processing parameters become critical throughout different stages for this alloy. This study is focused on the hot rolling process of René 65 for blade applications, with rolling temperature and strain rate as the parameters of interest. The results show the significant influence of starting temperature and strain rate for hot rolling of René 65 bar when processing through a continuous rolling mill. Slight changes in rolling temperature and strain rate could ultimately have a major impact on resulting microstructure and mechanical properties