New Forged Products from Alcoa

Development of Al-Li forged products has been a goal contemplated since the early 80s. Early alloys such as 2090 forgings exhibited low strength and toughness. 8090 products on the other hand included cold working prior to aging and were successfully implemented into the EH-101 helicopter, among other applications. In Russia, forged products from alloy O1420 gained some acceptance. This paper describes the technical aspects involved in legacy Al-Li forged products and describes the forging design challenges overcome for the development of successful forging applications. The performance of three new forging alloys termed C99N, C14U (2060) and C77W is presented and discussed in terms of the achieved mechanical properties that dictate positive performance as compared to alloys such as 7050-T74(52).