Process parameters for hot stamping of AA7075 and D-7xxx to achieve high performance aged products
dc.contributor.author | Omer, Kaab | |
dc.contributor.author | Abolhasani, Atekeh | |
dc.contributor.author | Kim, Samuel | |
dc.contributor.author | Nikdejad, Tirdad | |
dc.contributor.author | Butcher, Clifford | |
dc.contributor.author | Wells, Mary | |
dc.contributor.author | Esmaeili, Shahrzad | |
dc.contributor.author | Worswick, Michael | |
dc.date.accessioned | 2018-07-27T17:53:33Z | |
dc.date.available | 2018-07-27T17:53:33Z | |
dc.date.issued | 2018-07 | |
dc.description | The final publication is available at Elsevier via http://dx.doi.org/10.1016/j.jmatprotec.2018.02.039. © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | en |
dc.description.abstract | This work examines the necessary process parameters for die quenching (DQ) during hot stamping and subsequent age hardening and paint bake cycle (PBC) response for two alloys: AA7075 and a developmental 7xxx alloy (referred to as AA7xxx), with a lower Chromium content, higher Zirconium content and higher Zinc-to-Magnesium ratio in comparison to AA7075. For both alloys, a minimum solutionizing time of 8?min was found to be required, along with a minimum quench rate of 56?°C/s and 27?°C/s for AA7075 and AA7xxx, respectively. Two-step aging treatments, leveraging a paint bake cycle (PBC) of 177?°C for 30?min as the second step, were considered after die quenching and were devised to achieve T6- or T76-level strengths. For AA7075, an aging treatment of 120?°C for 8?h, followed by the paint bake cycle (PBC) produced strength levels similar to a T6 temper. DSC experiments showed that the microstructure from this heat treatment was similar to a peak-aged T6 temper. For AA7xxx, a treatment of 100?°C for 4?h and followed by the paint bake produced a strength similar to a T76 temper, while 120?°C for 3?h followed by the paint bake yielded T6 strength levels. The properties of the custom aging treatments were validated through tensile tests. The resulting stress-strain curves show that it is possible to achieve T6 or T76 properties using a custom aging treatment incorporating the PBC that is 65–83% shorter than standard T6 or T76 treatments. | en |
dc.description.sponsorship | Honda R&D Americas Inc. | en |
dc.description.sponsorship | Arconic Ground Transportation Group | en |
dc.description.sponsorship | Promatek Research Centre | en |
dc.description.sponsorship | Natural Sciences and Engineering Research Council | en |
dc.description.sponsorship | Canada Foundation for Innovation | en |
dc.description.sponsorship | Canada Research Chairs Secretariat | en |
dc.identifier.uri | http://doi.org/10.1016/j.jmatprotec.2018.02.039 | |
dc.identifier.uri | http://hdl.handle.net/10012/13497 | |
dc.language.iso | en | en |
dc.publisher | Elsevier | en |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | AA7075 | en |
dc.subject | AA7xxx | en |
dc.subject | Die quenching | en |
dc.subject | High strength | en |
dc.subject | Paint bake cycle | en |
dc.subject | Quench rate | en |
dc.subject | Solutionizing | en |
dc.title | Process parameters for hot stamping of AA7075 and D-7xxx to achieve high performance aged products | en |
dc.type | Article | en |
dcterms.bibliographicCitation | Omer, K., Abolhasani, A., Kim, S., Nikdejad, T., Butcher, C., Wells, M., … Worswick, M. (2018). Process parameters for hot stamping of AA7075 and D-7xxx to achieve high performance aged products. Journal of Materials Processing Technology, 257, 170–179. https://doi.org/10.1016/j.jmatprotec.2018.02.039 | en |
uws.contributor.affiliation1 | Engineering, Faculty of | en |
uws.contributor.affiliation2 | Mechanical and Mechatronics Engineering | en |
uws.peerReviewStatus | Reviewed | en |
uws.scholarLevel | Faculty | en |
uws.typeOfResource | Text | en |
uws.typeOfResource | Text | en |
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