Plastic Deformation and Ductility of AA7075 and AA6013 at Warm Temperatures Suitable to Retrogression Forming

Rader, Katherine E.; Carter, Jon T.; Hector, Louis G.; Taleff, Eric M.

doi:10.1007/s11661-021-06360-z

Cited by 11 publications

(2 citation statements)

References 26 publications

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“…Hot forming of aluminium is now a widely employed process within the automotive field and with improvements in forming processes is moving from niche applications to more high-volume manufacturing. The 5000-, 6000-and 7000-series are all used in combination with hot forming to produce deep drawn parts of complex geometries [9][10][11]. Various studies have demonstrated the suitability of AA6082 in combination with the HFQ forming process to achieve deep drawn high strength parts with complex geometries [12].…”

Section: Introductionmentioning

confidence: 99%

Identifying Optimal Hot Forming Conditions for AA6010 Alloy by Means of Elevated Temperature Tensile Testing

Taylor

Dhara

Slater

et al. 2022

Metals

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AA6010 in the F temper was investigated using a Gleeble 3800 test rig across a range of temperatures (350–550 °C) and strain rates (1 × 10−1 s−1 1 × 101 s−1) to identify optimal forming conditions. Post-forming electron back-scattered diffraction analysis was conducted to identify the mechanisms responsible for the material formability. Optimal forming conditions were observed to be 500 °C and a strain rate of 1 × 10−1 s−1, with clear evidence of dynamic recrystallisation observed, this being the dominant mechanism responsible for the increased formability. Peak yield strength of 335 MPa was achieved using a rapid aging treatment of 205 °C for one hour.

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Section: Introductionmentioning

confidence: 99%

Identifying Optimal Hot Forming Conditions for AA6010 Alloy by Means of Elevated Temperature Tensile Testing

Taylor

Dhara

Slater

et al. 2022

Metals

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“…Recently, several elevated temperature forming techniques, including retrogression forming (RF) and warm forming (WF), were proposed for shaping AA7xxx series automotive sheets without springback and fracture and their forming limit and mechanical properties reported. [17][18][19][20][21][22][23] Nowadays, forming limit diagrams (FLD), such as Marciniak-Kuczynski FLD, are developed to identify fracture on sheet metal at room and elevated temperature and aid formability. 24,25 Although related research is often experimental in nature, constitutive modeling and simulations have also been reported.…”

mentioning

confidence: 99%

Corrosion and hardness properties of retrogression‐formed and warm‐formed AA7075 sheet

Ogunsanya

2023

Engineering Reports

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To achieve combined formability and strength in high‐strength precipitation‐hardened aluminum automotive sheets, different forming path used with fast and slow forming technology has been proposed. This study reports hardness and corrosion properties from two elevated‐temperature forming techniques, retrogression forming (RF) and warm forming (WF), employed on AA7075 alloy sheets. Parameters such as optimal pre‐aging, re‐aging, WF, and RF temperature and time were determined. In the retrogression‐formed (R‐F) sheets, initial retrogression treatment of peak‐aged (i.e., T6) temper resulted in significant loss of properties, but final re‐aging step recovered most. When traditional peak‐aging treatment was used to re‐age R‐F sheets, their T6 hardness and corrosion properties were restored to 95%–97% and 86%, respectively, while re‐aging R‐F sheets using industrial post‐forming paint‐bake treatment restored their T6 hardness and corrosion properties to 87%–92% and 78%–79%. In the warm‐formed (W‐F) sheets, increasing pre‐aging temperature and time resulted in increasing properties, and properties of the best W‐F samples matched the R‐F samples. In addition, shorter‐time forming did not significantly reduce properties of formed part, encouraging the use fast‐forming technology. Overall, these findings show that sheets subjected to RF and WF techniques can possess T6 properties in formed parts.

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Tear Resistance of AA7075-T6 Sheet at Room Temperature and 200 °C

Nikolai

Taleff

2022

The Minerals, Metals &Amp; Materials Series

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Plastic Deformation and Ductility of AA7075 and AA6013 at Warm Temperatures Suitable to Retrogression Forming

Cited by 11 publications

References 26 publications

Identifying Optimal Hot Forming Conditions for AA6010 Alloy by Means of Elevated Temperature Tensile Testing

Identifying Optimal Hot Forming Conditions for AA6010 Alloy by Means of Elevated Temperature Tensile Testing

Corrosion and hardness properties of retrogression‐formed and warm‐formed AA7075 sheet

Tear Resistance of AA7075-T6 Sheet at Room Temperature and 200 °C

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