Experimental and Numerical Investigation of the Effect of Different Temperature and Deformation Speeds on Mechanical Properties and Springback behaviour in Al-Zn-Mg-Cu Alloy

Abstract

Thanks to their low density and high strength, the 7XXX series aluminum alloys are widely used as a support/beam parts in the aerospace industry. This alloy is target in the lightening studies of the automotive industry and surveys for sheet metal are still in progress. It is a series of alloys that can be applied to the aging process and has the most effect on mechanical properties. As formability is quite weak, methods are investigated. In this study, tensile test, bending test and Erichsen tests are performed at different deformation rates and temperatures. As a result of the experiments, it has been seen that the formability increases at high temperature and low deformation rates. If paint baking time is long, there will be no loss of strength. Also, the bending process is modeled with the help of the finite element analysis programs and the springback estimations are examined. It is seen that the results of the modeling process are quite successful. The effect of the strain rate sensitivity is determined.

Investigation of the Effect of Temperature and Strain Rate on Mechanical Properties

“…Aynı zamanda, ABAQUS programında bu modeli uygulamışlar ve yüksek sıcaklıklarda uygulanabilir olduğunu vurgulamışlardır. 7075 alüminyum alaşımında farklı sıcaklık ve deformasyon hızının mekanik özelliklere etkisi incelenen diğer çalışmalarda da (Puchi-Cabrera et al , 2011;Lu et al , 2018;Xiao et al , 2018;Kilic, 2019), sıcaklık artışıyla birlikte akma mukavemeti düşerken, sünekliğin arttığı görülmüştür (Şekil 13-14). Deformasyon hızının artışıyla akma ve çekme mukavemeti artarken, sünekliğin pek fazla değişmediği gösterilmiştir.…”

“…Fakat alüminyum alaşımlarına plastik şekil verme işleminde çeşitli sorunlarla karşılaşılmaktadır. Plastik şekil verme yeteneğini geliştirmek üzere sıcaklık arttırılarak deneysel çalışmalar yapılmaktadır (Kilic, 2019;Liu et al , 2020;Simonetto et al , 2020;Attar et al , 2021).…”

Thick Plate Bending and Image Processing Algorithms Assistant for Deformation Process Discretization Analyses

“…MG Lee et al [7] derived and implemented a practical two-surface plasticity model based on classical Dafalias/Popov and Krieg concepts to incorporate yield anisotropy and three hardening effects for nonmonotonous deformation paths: the Bauschinger effect, transient hardening and permanent softening. And they proposed and implemented a simple-but-effective stress-update scheme avoiding overshooting [8]. They found that two-surface model improved such predictions significantly as compared with single-surface models, while the differences between two-surface simulations and experiments were insignificant.…”