Research Article
Al7075-T6 sac malzemede tavlamanın şekillendirilebilirlik ve geri esnemeye etkilerinin deneysel araştırılması
Abstract
Bu çalışmada Al7075–T6 sac malzemesinin
tavlama parametrelerine bağlı olarak V bükme ile şekillendirilebilirliği ve
geri esneme davranışı deneysel olarak araştırılmıştır. Tavlama işlemleri,
farklı tavlama sıcaklıklarında (100, 200, 300 ve 400 °C) ve farklı tavlama sıcaklığında
tutma sürelerinde (6, 30 ve 60dk.) uygulanmıştır. Tavlanan Al7075–T6 numunelerin şekillendirilebilirliği 15, 30,
45, 60 ve 75 derece açılı V bükme kalıplarında sabit deformasyon hızında
bükülerek incelenmiştir. Ayrıca, tavlanan numunelerde tavlama süresinin
artışına bağlı olarak 300 °C sıcaklık ile birlikte tanecik oluşumu
gözlemlenmiştir. Yükselen tavlama sıcaklığına bağlı olarak tane boyutlarında
artma ve sertlikte de azalma gözlemlenmiştir. Tavlanmamış numunelerin oda
sıcaklığında ki (RT) sertlik değerleri 200,67 HV iken, 400 °C sıcaklıkta 60 dk.
süre ile tavlanan numunelerin sertliğinin 62,90 HV değerine düştüğü gözlemlenmiştir.
Buna bağlı olarak tavlanmamış numuneler en fazla 15° büküm açısına kadar bükme
ile şekillendirilebilirken, 300°C ve üzeri sıcaklıklarda tavlanan numuneler 75°
büküm açısında dahi çatlama ve kırılma olmaksızın sorunsuzca şekillendirilebilmişlerdir.
Yüksek sıcaklıklarda tavlanan numunelerde düşük sıcaklıklarda tavlanan
numunelere kıyasla geri esneme davranışının ortalama %80-90 oranlarında daha az
miktarda meydana geldiği gözlemlenmiştir.
Keywords
References
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- Farsi, M.A. and B. Arezoo, Bending force and spring-back in v-die-bending of perforated sheet-metal components. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 33(1): p. 45-51, 2011.
- Garcia-Romeu, M., J. Ciurana, and I. Ferrer, Springback determination of sheet metals in an air bending process based on an experimental work. Journal of Materials Processing Technology, 191(1-3): p. 174-177, 2007.
- Schilp, H., J. Suh, and H. Hoffmann, Reduction of springback using simultaneous stretch-bending processes. International journal of material forming, 5(2): p. 175-180, 2012.
- Chen, J., et al., Investigation of precipitation behavior and related hardening in AA 7055 aluminum alloy. Materials Science and Engineering: A, 500(1-2): p. 34-42, 2009.
- Temmar, M., M. Hadji, and T. Sahraoui, Effect of post-weld aging treatment on mechanical properties of Tungsten Inert Gas welded low thickness 7075 aluminium alloy joints. Materials & Design, 32(6): p. 3532-3536, 2011.
- Panigrahi, S.K. and R. Jayaganthan, Effect of annealing on thermal stability, precipitate evolution, and mechanical properties of cryorolled Al 7075 alloy. Metallurgical and Materials Transactions A, 42(10): p. 3208-3217, 2011
Year 2021,
Volume: 36 Issue: 3, 1319 - 1330, 24.05.2021
Abstract
References
- Lee, M.-Y., et al., Effects of pre-treatment conditions on warm hydroformability of 7075 aluminum tubes. Journal of Materials Processing Technology, 155: p. 1337-1343, 2004.
- Shaeri, M., et al., Microstructure and mechanical properties of Al-7075 alloy processed by equal channel angular pressing combined with aging treatment. Materials & Design, 57: p. 250-257, 2014.
- Yazdian, N., F. Karimzadeh, and M. Tavoosi, Microstructural evolution of nanostructure 7075 aluminum alloy during isothermal annealing. Journal of alloys and compounds, 493(1-2): p. 137-141, 2010.
- Kumar, M., AW-7075-T6 sheet for shock heat treatment forming process. Transactions of Nonferrous Metals Society of China, 27(10): p. 2156-2162, 2017.
- Tajally, M. and E. Emadoddin, Mechanical and anisotropic behaviors of 7075 aluminum alloy sheets. Materials & Design, 32(3): p. 1594-1599, 2011.
- Jeshvaghani, R.A., et al., Influence of multi-step heat treatments in creep age forming of 7075 aluminum alloy: optimization for springback, strength and exfoliation corrosion. Materials characterization, 73: p. 8-15, 2012.
- Gisario, A., M. Barletta, and S. Venettacci, Improvements in springback control by external force laser-assisted sheet bending of titanium and aluminum alloys. Optics & Laser Technology, 86: p. 46-53, 2016.
- Polak, S., et al., Warm forming of 7075 aluminum alloys. Procedia Engineering, 207: p. 2399-2404, 2017.
- LeMaster, R., et al., Grinding Induced Changes in Residual Stresses of Carburized Gears. Lateral, 4(3), 42-47, 2007.
- Farsi, M.A. and B. Arezoo, Bending force and spring-back in v-die-bending of perforated sheet-metal components. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 33(1): p. 45-51, 2011.
- Garcia-Romeu, M., J. Ciurana, and I. Ferrer, Springback determination of sheet metals in an air bending process based on an experimental work. Journal of Materials Processing Technology, 191(1-3): p. 174-177, 2007.
- Schilp, H., J. Suh, and H. Hoffmann, Reduction of springback using simultaneous stretch-bending processes. International journal of material forming, 5(2): p. 175-180, 2012.
- Chen, J., et al., Investigation of precipitation behavior and related hardening in AA 7055 aluminum alloy. Materials Science and Engineering: A, 500(1-2): p. 34-42, 2009.
- Temmar, M., M. Hadji, and T. Sahraoui, Effect of post-weld aging treatment on mechanical properties of Tungsten Inert Gas welded low thickness 7075 aluminium alloy joints. Materials & Design, 32(6): p. 3532-3536, 2011.
- Panigrahi, S.K. and R. Jayaganthan, Effect of annealing on thermal stability, precipitate evolution, and mechanical properties of cryorolled Al 7075 alloy. Metallurgical and Materials Transactions A, 42(10): p. 3208-3217, 2011
There are 15 citations in total.
Details
| Primary Language | Turkish |
|---|---|
| Subjects | Engineering |
| Journal Section | Makaleler |
| Authors | |
| Publication Date | May 24, 2021 |
| Submission Date | November 14, 2019 |
| Acceptance Date | January 18, 2021 |
| Published in Issue | Year 2021 Volume: 36 Issue: 3 |