20240035137. WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME simplified abstract (CONSTELLIUM ISSOIRE)

WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME

Organization Name

CONSTELLIUM ISSOIRE

Inventor(s)

Melanie Ollat of Ruy-Montceau (FR)

Jean-Christophe Ehrstrom of Grenoble (FR)

WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240035137 titled 'WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME

Simplified Explanation

The abstract describes a method for thermomechanical treatment of wrought products made of a 2000 series aluminum alloy. The alloy composition includes various elements such as copper, magnesium, manganese, iron, silicon, zirconium, silver, zinc, titanium, and unavoidable impurities. The treatment involves a tempering process consisting of two sequences.

• The first sequence is defined by a maximum temperature (T) between 130°C and 180°C, and a hold time at a temperature between 130°C and 180°C, equivalent to an equivalent duration (t) calculated at 160°C between 10 hours and 80 hours.
• The second sequence is defined by a temperature (T(t)) lower than T and a hold time (t) at a temperature between 100°C and 130°C, equivalent to an equivalent time (t) calculated at 160°C, such that it comprises between 0.3% and 15% of the equivalent duration (t) calculated for the first sequence.

Potential applications of this technology:

• Improved resistance to corrosion under stress in wrought products made of a 2000 series aluminum alloy.
• Suitable for various industries where corrosion resistance is crucial, such as aerospace, automotive, and marine.

Problems solved by this technology:

• Enhances the resistance to corrosion under stress, addressing a common issue in aluminum alloys.
• Provides a method for improving the mechanical properties of the alloy, ensuring its durability and reliability.

Benefits of this technology:

• Increased lifespan and performance of wrought products made of a 2000 series aluminum alloy.
• Cost-effective solution for improving corrosion resistance without the need for additional coatings or treatments.
• Enables the use of the alloy in demanding environments where corrosion under stress is a concern.

Original Abstract Submitted

a method for thermomechanical treatment of wrought products made of a 2000 series aluminum alloy comprising, in % by weight, cu 3.5-5.8; mg 0.2-1.5; mn≤0.9; fe≤0.15; si≤0.15; zr≤0.25; ag≤0.8; zn≤0.8; ti 0.02-0.15; unavoidable impurities≤0.05 each and ≤0.15 total; remainder aluminum, enabling an improvement in the resistance to corrosion under stress. it includes a tempering consisting of two sequences. the first sequence is defined by a maximum temperature tcomprised between 130� c. and 180� c. and by a hold time at a temperature comprised between 130� c. and 180� c. which equates to an equivalent duration tcalculated at 160� c. comprised between 10 h and 80 h. the second sequence is defined by a temperature t(t) lower than tand a hold time t at a temperature comprised between 100� c. and 130� c., which equates to an equivalent time tcalculated at 160� c. such that tcomprised between 0.3% and 15% of the equivalent duration tcalculated for the first sequence.