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Development of Large-Sized Titanium Alloy Ti6Al4V and Nickel-Based Superalloy Inconel-718 Forgings for Reusable Launch Vehicle-Technology Demonstrator Flight


Affiliations
1 Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, India
2 Mishra Dhatu Nigam Limited, Hyderabad 500 058, India
 

Ti6Al4V owing to its high specific strength and Inconel-718 due to its high strength and oxidation resistance at elevated temperatures, have been used in Reusable Launch Vehicle-Technology Demonstrator (RLV-TD). Achieving required properties in large cross-section aerospace quality forgings of these alloys is challenging and has not been reported earlier. Hence, thermo-mechanical processing cycles have been devised to realize forgings of ~1400 mm length in these alloys and successfully used in RLV-TD. Forgings of these alloys having desired microstructures and ultrasonic quality of Class-A1 as per AMS 2630 B standard have been realized. This article discusses the processing challenges and solutions thereof.

Keywords

Aerospace Alloys, Forging, Microstructure, Ultrasonic Quality.
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  • Development of Large-Sized Titanium Alloy Ti6Al4V and Nickel-Based Superalloy Inconel-718 Forgings for Reusable Launch Vehicle-Technology Demonstrator Flight

Abstract Views: 320  |  PDF Views: 153

Authors

R. K. Gupta
Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, India
V. Anil Kumar
Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, India
P. Ramkumar
Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, India
U. V. Gururaja
Mishra Dhatu Nigam Limited, Hyderabad 500 058, India

Abstract


Ti6Al4V owing to its high specific strength and Inconel-718 due to its high strength and oxidation resistance at elevated temperatures, have been used in Reusable Launch Vehicle-Technology Demonstrator (RLV-TD). Achieving required properties in large cross-section aerospace quality forgings of these alloys is challenging and has not been reported earlier. Hence, thermo-mechanical processing cycles have been devised to realize forgings of ~1400 mm length in these alloys and successfully used in RLV-TD. Forgings of these alloys having desired microstructures and ultrasonic quality of Class-A1 as per AMS 2630 B standard have been realized. This article discusses the processing challenges and solutions thereof.

Keywords


Aerospace Alloys, Forging, Microstructure, Ultrasonic Quality.

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DOI: https://doi.org/10.18520/cs%2Fv114%2Fi01%2F131-136