Effect of ECAP and post-aging processes on 2024 aluminum alloy

Saraloglu, Ebru
Tan, Evren
Gür, Cemil Hakan
Strength of aluminum alloys can be remarkably improved by obtaining ultrafine grain size via severe plastic deformation. Equal Channel Angular Pressing (ECAP) is considered to be a good candidate that is capable to produce bulk components. In this study, the combined effects of ECAP and post-aging treatment on the mechanical properties of aluminum alloys were investigated. An ECAP die with 120 degrees channel angle was used for severe plastic deformation of 2024 Al-alloy. The ECAPed specimens revealed higher hardness values after post-aging at 190 degrees C.


Effect of ECAP and subsequent heat treatments on microstructure and mechanical properties of 2024 aluminum alloy
Saraloğlu, Ebru; Gür, Cemil Hakan; Department of Metallurgical and Materials Engineering (2008)
Severe plastic deformation (SPD) results in ultra-fine grain sizes in metals and alloys. Equal channel angular pressing (ECAP) is one of the special SPD methods aiming to introduce high plastic strains into the bulk materials without changing their cross section. ECAP results in improvement in hardness and strength while still satisfying acceptable ductility level. The combined effects of ECAP and subsequent heat treatments, i.e. post-aging and post-annealing, on the microstructure and hardness of the 2024 ...
Effect of temperature on fatigue properties of Din 35 NiCrMoV 12 5 steel
Önem, Orkun Umur; Gürbüz, Rıza; Department of Metallurgical and Materials Engineering (2003)
DIN 35NiCrMoV125 (equivalent to AISI 4340), which is a high strength low alloy steel (HSLA), is mainly used at military applications in the production of gun barrels. The main aim of this study was to determine the low cycle fatigue (LCF) behaviour and the influence of temperature on low cycle fatigue failure properties of that steel. Three different temperatures (room temperature, 2500C and 4000C) were used in the experiments in order to analyze the effect of temperature. For each temperature, five strain ...
Effects of heat input and thermal cycles to the fracture toughness of API 5L grade X70M steel welded by gas metal arc welding
Erol, Eren; Gür, C. Hakan.; Department of Metallurgical and Materials Engineering (2019)
High strength low alloy steels are widely used in line pipe applications since they have reasonably high strength and toughness due to their micro-alloying elements and production via thermomechanically controlled process. During welding of these steels, microstructures of the fusion zone and the heat affected zone consisting globular and acicular ferrite alter due to induced heat and thermal cycles. Consequently, changes in the microstructure affects the mechanical properties such as fracture toughness. Ga...
Role of Laminate Thickness on Sequential Dynamic Delamination of Curved [90/0] CFRP Composite Laminates
Uyar, Imren; Tasdemir, B.; Yavas, D.; Çöker, Demirkan (2016-06-09)
In aerospace industry, high demand for the lightweight structures are fostering the use of carbon fiber reinforced polymer composites in a wide variety of shapes, as primary load carrying elements. However, once a composite laminate takes a highly curved shape, such as an L-shape, interlaminar stresses augmented in the curved region cause highly dynamic delamination nucleation and propagation. This paper provides experimental observations of dynamic delamination failure in cross-plied L-shaped composite lam...
Long-term thermal stability of Equal Channel Angular Pressed 2024 aluminum alloy
TAN, Guher; Kalay, Yunus Eren; Gür, Cemil Hakan (2016-11-20)
The strength of bulk metallic materials can be improved by creating ultra-fine grained structure via severe plastic deformation (SPD). However, the thermal stability of severely deformed materials has been a major issue that restricts their practical use within the industry. Although there are studies on the thermal stability of SPD metals, the long-term annealing response of particularly complex alloys, such as the age hardenable ones, remains undetermined. In the present study, annealing behavior of the s...
Citation Formats
E. Saraloglu, E. Tan, and C. H. Gür, “Effect of ECAP and post-aging processes on 2024 aluminum alloy,” STEEL RESEARCH INTERNATIONAL, pp. 467–471, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55425.