Beschreibung:
This book provides theoretical foundations of the technological processes for melting, casting, forming, heat treatment, and welding of Al-Li alloys. It contains a critical survey of the research in the field and presents data on commercial Al-Li alloys, their phase composition, microstructure, and heat treatment of the ingots, sheets, forgings, and welds of Al-Li alloys. It is illustrated with examples of Al-Li alloy applications in aircraft structures and presents recommendations on solving practical problems involved with melting and casting ingots, welding of Al-Li alloys, and producing massive stampings for welded products.
Brief History of Aluminum-Lithium Alloy Creation. Theoretical Basis of Aluminum-Lithium Alloying with Controlled Lithium Content and Metallic and Nonmetallic Impurities. Hydrogen in Aluminum-Lithium Alloys. Crack Susceptibility and Peculiarities of Casting Aluminum-Lithium Alloy Billets. Aluminum-Lithium Alloy Grain Structure Solidification Conditions and Peculiarities. Excess Hetero-Phasicity in 1420 Alloy Billets and Its Hereditary Influence on the Structure, Properties, and Weldability of Semifinished Products. Structure, Mechanical Properties, and Weldability of Alloy 1420 Die Forgings of Complicated Configuration versus Initial Slab Structure and Pressure Forming Modes. Aluminum-Lithium Alloy Welding Process Features.