Mechanism of low temperature deformation in aluminium alloys

Gruber, Belinda; Weißensteiner, Irmgard; Kremmer, Thomas; Grabner, Florian; Falkinger, Georg; Schökel, Alexander; Spieckermann, Florian; Schäublin, R.; Uggowitzer, Peter J.; Pogatscher, Stefan

doi:10.1016/j.msea.2020.139935

Cited by 77 publications

(19 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Lower dynamic recovery at 77 K would lead to a higher dislocation density, and therefore to higher strain hardening rates and a lower decrease in the strain hardening rate during deformation ( Fig. 3 (b)) [52] .…”

Section: Temperature Dependence Of Deformation Behaviormentioning

confidence: 99%

Effects of cryogenic temperature on tensile and impact properties in a medium-entropy VCoNi alloy

Yang

Ikeda

et al. 2021

Journal of Materials Science & Technology

View full text Add to dashboard Cite

Section: Temperature Dependence Of Deformation Behaviormentioning

confidence: 99%

Effects of cryogenic temperature on tensile and impact properties in a medium-entropy VCoNi alloy

Yang

Ikeda

et al. 2021

Journal of Materials Science & Technology

View full text Add to dashboard Cite

“…Düşük sıcaklıklarda deformasyon hızının akma mukavemetine etkisi yok denecek kadar az iken, yüksek sıcaklıklarda etkili olduğu gösterilmiştir. Gruber ve arkadaşları (Gruber et al , 2020), alüminyum alaşımlarında düşük sıcaklıklarda oluşan deformasyon mekanizmalarını incelemişlerdir. 1085, 5182 ve 6016 alüminyum alaşımları üzerinde 296 K ile 77 K sıcaklıklarında çekme deneyleri yapılmış ve iç yapı incelemesi yapmışlardır.…”

Section: Umagd (2022) 14(2) 406-419 Kılıç and Demirdöğenunclassified

“…Şekil 16. Farklı seri alüminyum alaşımlarında sıcaklığın gerilme birim deformasyon eğrisine etkisi (Gruber et al , 2020).…”

Section: Umagd (2022) 14(2) 406-419 Kılıç and Demirdöğenunclassified

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

Kılıç

DEMİRDÖĞEN²

2022

IJERAD

View full text Add to dashboard Cite

The tensile test is one of the most basic and simple tests in which the material is pulled in a single axis until it breaks and allow us to recognize the material from the data obtained from it. While recognizing materials, their behavior under different temperatures and strain rates is also important. Especially in the manufacturing industry, there are many different production and shaping methods, and each has its own characteristics. For example, in the hot deep drawing process, the mechanical properties of the material can be determined by hot tensile tests. At the same time, this situation has become more important with the development of finite element analysis programs. Because modeling under the same conditions is very effective on the accuracy of the results. In this study, the effects of temperature and strain rate on tensile properties are investigated in steel, titanium, aluminum and nickel alloys. In the examinations, it is seen that the change of the temperature and strain rate for these materials have a great effect on the stress and ductility.

show abstract

“…The activation of multi-slip systems and the suppression of dynamic recovery of dislocations promote high ductility and hardening ability [7]. Although the physical mechanism of the cryogenic DEE needs further to be studied, it can be determined to be a general and stable phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Wrinkling control and microstructure of 7075 aluminum alloy hemispherical shell in gradient ultra-low temperature forming

Fan

Qiao²,

Chen³

et al. 2023

Preprint

View full text Add to dashboard Cite

Gradient ultra-low temperature forming is a novel process for improving the forming limit of aluminum alloy thin-walled components. It is still very critical to prevent the wrinkling defect through blank-holding. The effects of draw bead and blank-holder force on the wrinkling behaviors in gradient ultra-low temperature forming for a 7075 aluminum alloy hemispherical shell were thus experimentally studied. The wrinkling controlling mechanism was revealed through stress and strain analyzing. The required blank-holder force to prevent wrinkling can be reduced significantly through the setting of draw bead. The blank-holder force of 120 kN can be used to form the sound hemispherical specimen with 200 mm in diameter, being 31.5% of that without draw bead. This benefits from the decreasing hoop compressive stress in unsupported region, which reduced to 165 MPa from 516 MPa. The hemispherical shell formed in gradient ultra-low temperature forming was twice higher than that at room temperature. And the thickness deviation is only 7.2%. Moreover, the reason for the enhanced formability was revealed by microstructure observation. The uniform distributed high-density dislocation at the ultra-low temperature significantly improves the strain-hardening ability so that the deformation can be withstood and transferred. This can avoid the splitting of the unsupported region while setting the draw bead to prevent wrinkling. It is very beneficial to greatly reduce the tonnage requirement, especially for the large-sized thin-walled components, which expands the application range of gradient ultra-low temperature forming.

show abstract

Mechanism of low temperature deformation in aluminium alloys

Cited by 77 publications

References 58 publications

Effects of cryogenic temperature on tensile and impact properties in a medium-entropy VCoNi alloy

Effects of cryogenic temperature on tensile and impact properties in a medium-entropy VCoNi alloy

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

Wrinkling control and microstructure of 7075 aluminum alloy hemispherical shell in gradient ultra-low temperature forming

Contact Info

Product

Resources

About