creator Kara, Baris advisor Nash, Philip The effect of natural aging (NA) on mechanical properties in double aged aluminum alloys, AA7075, was studied by means of hardness tests, tensile tests and stress corrosion cracking (SCC) tests. Natural aging can strengthen AA7075 alloys after solution heat treatment, and reaching the stable condition can take years for the alloy. Double aging (DA) is very beneficial method in terms of energy savings and productivity because this method provides the peak hardness in a much shorter time compared to single aging, and DA treatment produces hardness, yield stress and tensile stress which are comparable with those produced by SA. In this study, the alloys were naturally aged for different times before double aging treatment, and the relationship between double aging treatment and natural aging treatment was observed. The results show that different natural aging times do not significantly affect the final mechanical properties of double aged alloys. Consequently, the loading time to aging furnace after solution heat treatment does not play an important role in the double aging treatment of AA7075 alloys. Submitted by Dana Lamparello (dlampare@iit.edu) on 2012-08-23T18:22:17Z No. of bitstreams: 2 THESIS BARIS KARA.pdf: 7800572 bytes, checksum: a585790d267bd129bd7511293ff3ee92 (MD5) Signed Title.PDF: 329687 bytes, checksum: 366fa8902f72afc5b314d659fdf38b99 (MD5) Made available in DSpace on 2012-08-23T18:22:17Z (GMT). No. of bitstreams: 2 THESIS BARIS KARA.pdf: 7800572 bytes, checksum: a585790d267bd129bd7511293ff3ee92 (MD5) Signed Title.PDF: 329687 bytes, checksum: 366fa8902f72afc5b314d659fdf38b99 (MD5) Previous issue date: 2012-05 M.S. in Materials Science and Engineering, May 2012 2012-04-27 2012-05 http://hdl.handle.net/10560/2851 en Thesis born digital application/pdf In Copyright http://rightsstatements.org/page/InC/1.0/ Restricted Access MMAE / Mechanical, Materials, and Aerospace Engineering Illinois Institute of Technology Affiliated department