| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Development of Light Weight Alloys and Composites
|
| Presentation Title |
The Effect of Multiple Age Treatment on Mechanical Properties of 7075 Al Alloy |
| Author(s) |
AHM Esfakur Esfakur Rahman, Issam Abu-Mahfouz, Amit Banerjee |
| On-Site Speaker (Planned) |
AHM Esfakur Esfakur Rahman |
| Abstract Scope |
One of the widely used aerospace alloys is 7075 aluminum alloy because of high tensile and compressive strength and good response to exfoliation corrosion. These 7000 aluminum alloy series are hardened by solution heat treatment followed by artificial ageing. Numerous works have been done on artificial ageing which increases strength as the aging temperature increases up to a limit then decreases. Recent trend shows that the strength can be increased more by applying double aging. This research focuses on the effect of multiple aging temperature, time, and pre-age strain hardening on the mechanical and fatigue properties of 7075 aluminum alloys. ASTM standard coupons were machined from an as received aluminum plate and applied different combination of age treatment and strain hardening. The initial results on strength, ductility, fatigue crack growth and precipitation behavior are reported. The fatigue crack growth behavior is being determined using an in-house crack detection method. |