Aircraft metallic materials >> Light and Superlight Alloys on the Base of Al and Mg >> High-strength Al alloys
High-strength Al alloys
Aluminum wrought and casting alloys are the basic structural materials for aircraft airframes and special types of engineering.
Progressive dynamics of the property set of high-strength alloys for the aircraft engineering
High-strength Al alloys on the base of Al-Zn-Mg-Cu (Zr) system possess the maximum specific strength.
- enhanced weight efficiency of 15-25%;
- long-term service life.
Long-length panels; V96Ts3pch,V95och-T2 plates (900-1500 mm)×(to 27 m)
V96Ts3pch (1965-1) T12/T22 high-strength (σb≥615-645 MPa) alloy is recommended instead of alloys of V95o.ch.-T2 type in the form of rolled and extruded semifinished products for upper wing skins and other elements mainly in compression zones of an airframe of advanced aircraft structures.
1933-T2/T3 advanced forging alloy (σb>500/440 MPa) with the increased cracking resistance (K1c>39/43 MPa) is applied for the inner primary structure (frames fittings, beams) in aeroplanes of “Antonov” Aircraft Scientific Technical Complex (ASTC) and A.S. Yakovlev Experimental Design Bureau (EDB), the alloy exceeds 7175T73 and 7050T74 foreign analogues in fracture toughness by 20-30%. Now it is being mastered for primary structural elements of aeroplanes of A340 type (Airbus Industrie).
Large-size extrusion-forged shape1933 (800×320 mm)×(to 8 m)
V95och, V95pch, 1933 (σb=500-540 MPa) are the present-day alloys, widely used mainly in the form of rolled and extruded semifinished products for wing skins stringers (bended, sheet and extruded) and other aircraft fuselage elements.
V96Ts, V96Ts1 alloys are those ones, which possess the maximum strength (σb=670-700 MPa) (V96Ts centrifuges are used for the production of 235 enriched uranium).