MUMBAI, India, Jan. 23 -- Intellectual Property India has published a patent application (202511125239 A) filed by Uttaranchal University, Dehradun, Uttarakhand, on Dec. 11, 2025, for 'a hybrid severe plastic deformation processing route for aa2099 aluminium-copper-lithium alloy using multi-axial forging, cryorolling, and post-annealing.'
Inventor(s) include Atul Bhatt; Amit Joshi; Ruby Pant; and Anjali Bhatt.
The application for the patent was published on Jan. 23, under issue no. 04/2026.
According to the abstract released by the Intellectual Property India: "The invention discloses a hybrid severe plastic deformation (SPD) processing route for AA2099 aluminium-copper-lithium alloy that integrates multi axial forging, cryorolling, and controlled post annealing. Conventional methods fail to simultaneously achieve refined grain structures, uniform precipitation, and isotropic mechanical properties. The proposed process begins with multi axial forging to impart uniform strain and reduce anisotropy, followed by cryorolling at cryogenic temperatures to suppress recovery and fragment grains, and concludes with post annealing to stabilize microstructure and promote precipitation of strengthening phases. The resulting alloy exhibits ultrafine grains below 1-3 m, high dislocation density, and dense nanoscale precipitates. Mechanical testing demonstrates yield strength above 470 MPa, tensile strength above 540 MPa, elongation of 8-12%, hardness up to 184 HV, and high cycle fatigue strength of 167 MPa. The process is scalable, cost effective, and industrially feasible, producing AA2099 alloy with superior isotropy, strength, ductility, fatigue resistance, and thermal stability for aerospace and defense applications."
Disclaimer: Curated by HT Syndication.
