Combining a retrogressionRetrogression heat treatment with simultaneous warm formingForming can increase the formability of peak-aged, high-strengthHigh-strength aluminumAluminum alloys while allowing peak-aged strength to be recovered through a single reaging heat treatment after formingForming . This process is termed retrogressionRetrogression -forming Forming -and-reaging (RFRA). This study investigates the applicability of RFRA to AA6013AA6013 -T6 sheet material. Elevated-temperature tensile tests were performed at temperatures from 230 to 250 °C and strain rates from 3.2 × 10−3 to 10−1 s−1. Tensile tests were followed by reaging with a simulated paint-bake heat treatment. Flow stress at a true strain of 0.10 ranges from 230 MPa (250 °C and 3.2 × 10−3 s−1) to 290 MPa (230 °C and 10−1 s−1), significantly lower than the room-temperature yield strength of 360 MPa in the T6 condition. The average elongation to rupture and reduction in area from elevated-temperature tests are 22% and 56%, respectively, which are similar to the room-temperature values for the T4 condition. Elevated-temperature testing reduced material hardness compared to the original T6 condition. Subsequent reaging with a simulated paint-bake raised hardness to 96% of the T6 condition in un-deformed material, but slightly decreased the hardness of the deformed material. Recommendations for implementing RFRA of AA6013AA6013 -T6 are presented.
Weitere Kapitel dieses Buchs durch Wischen aufrufen
Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten
Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:
- Plastic Flow of AA6013-T6 at Elevated Temperatures and Subsequent Reaging to Regain Full Strength
Katherine E. Rader
Jon T. Carter
Louis G. Hector Jr.
Eric M. Taleff
in-adhesives, MKVS, Zühlke/© Zühlke, Nordson/© Nordson, ViscoTec/© ViscoTec, Hellmich GmbH/© Hellmich GmbH