DRDO develops near-isothermal forging technology for aero-engines
Defence Research and Development Organisation (DRDO) has established a forging technology to produce various stages of high-pressure compressor discs from titanium alloy.
Defence Research and Development Organisation (DRDO) has established the near isothermal forging technology to produce all the five stages of high-pressure compressors (HPC) discs out of difficult-to-deform titanium alloy using its unique 2000 MT isothermal forge press. The technology has been developed by the Defence Metallurgical Research Laboratory (DMRL), a premier metallurgical laboratory of DRDO at Hyderabad.
This is a crucial technology for establishing self-reliance in aero-engine technology. With this development, India has joined the league of limited global engine developers to have the manufacturing capabilities of such critical aero-engine components.
HPC drum is a highly stressed sub-assembly and is also subjected to low cycle fatigue and creep at elevated temperatures. The raw materials and forgings for the HPC drums are required to be of the highest quality which can meet the specified combination of static and dynamic mechanical properties.
DMRL developed this forging technology by integrating various science and knowledge-based tools. The methodology adopted by DMRL is generic in nature and can be tuned to develop other similar aero-engine components. The compressor discs produced using this methodology met all the requirements stipulated by the airworthiness agencies for the desired application. Accordingly, the technology was type certified and a letter of technical approval (LoTA) was accorded. Based on the exhaustive component level and performance evaluation test results, HAL (E) and Indian Air Force cleared the components for engine fitment. Apart from DMRL and HAL (E), various agencies such as MIDHANI, CEMILAC, and DGAQA worked in unison to establish this crucial technology.
Secretary Department of Defence R&D and Chairman DRDO Dr. G Satheesh Reddy expressed his satisfaction on achieving this crucial milestone and congratulated the teams involved.