Tensile and compressive deformation behaviors of commercially pure Al processed by equal-channel angular pressing with different dies

Wang, Jiangwei; Duan, Qingling; Huang, Chenguang; Sheng, Wu; Zhang, Z. F.

doi:10.1016/j.msea.2008.05.041

Cited by 30 publications

(12 citation statements)

References 33 publications

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“…With increasing numbers of passes, the numbers of dimples increases and their distribution becomes more uniform. These results demonstrate that the numbers and distributions of the fracture dimples are related to the numbers of ECAP passes as also noted earlier for a commercial purity Al‐1060 alloy …”

Section: Methodssupporting

confidence: 86%

Micro‐Forming Using Ultrafine‐Grained Aluminum Processed by Equal‐Channel Angular Pressing

Zhu

Shi

et al. 2015

Adv Eng Mater

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A very high-purity (99.999%) aluminum was processed by equal-channel angular pressing (ECAP) at room temperature through 1 to 8 passes using a die with a channel angle of 90°. Analysis shows that processing by ECAP produces an ultrafine-grained (UFG) structure with a grain size of %1.3 mm and with microhardness and microstructural homogeneity. The mechanical properties and the fracture behavior were evaluated using micro-tensile testing after ECAP processing. A micro-forming process was used to fabricate a micro-turbine at ambient temperature and subsequent examination demonstrated that UFG pure aluminum gives higher strength and more uniform mechanical properties by comparison with conventional coarse-grained pure aluminum. The results confirm the very significant potential for using UFG pure aluminum for micro-forming at ambient temperature.

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Section: Methodssupporting

confidence: 86%

Micro‐Forming Using Ultrafine‐Grained Aluminum Processed by Equal‐Channel Angular Pressing

Zhu

Shi

et al. 2015

Adv Eng Mater

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“…Before extrusion, all the samples were annealed at 380 °C for 1.5 h and then cooled slowly in a furnace to room temperature [19,20]. This leads to a homogeneous and uniform structure with good ductility in all specimens before operation.…”

Section: Methodsmentioning

confidence: 99%

Experimental Investigation of the Equal Channel Forward Extrusion Process

Ebrahimi

Djavanroodi

Tiji

et al. 2015

Metals

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Among all recognized severe plastic deformation techniques, a new method, called the equal channel forward extrusion process, has been experimentally studied. It has been shown that this method has similar characteristics to other severe plastic deformation methods, and the potential of this new method was examined on the mechanical properties of commercial pure aluminum. The results indicate that approximate 121%, 56%, and 84% enhancements, at the yield strength, ultimate tensile strength, and Vickers micro-hardness measurement are, respectively, achieved after the fourth pass, in comparison with the annealed condition. The results of drop weight impact test showed that the increment of 26% at the impact force, and also decreases of 32%, 15%, and 4% at the deflection, impulse, and absorbed energy, are respectively attained for the fourth pass when compared to the annealed condition. Furthermore, the electron backscatter diffraction examination revealed that the average grain size of the final pass is about 480 nm.

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“…This mechanism of fracture development has also been observed and well reported by Naseri et al [60] in hybrid composite and during ARB by the same researcher [61] in another investigation with 2024 alloy. Wang et al [62] have shown that the ductility of materials decreased after ECAP deformation and uniform elongation became very limited and subsequently, a drastic reduction of work hardening ability. After nucleation of dimples, there is no time to grow and accumulate in nearby other dimples around it and encourage developing shallower dimples.…”

Section: Crystallographic Texture Evolutionmentioning

confidence: 99%

Development of ultrafine grained Al–Zn–Mg–Cu alloy by equal channel angular pressing: microstructure, texture and mechanical properties

Ghosh

Gudimetla

et al. 2020

Archiv.Civ.Mech.Eng

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In this article, an effort has been made to investigate the evolution of microstructure, texture and mechanical properties of AA 7075 alloy during equal channel angular pressing (ECAP) by route B C at room temperature at a pressing speed of 1 mm/ min. Transmission electron microscopy (TEM) revealed the presence of rod-like (MgZn 2 ) precipitates in annealed conditions which were broken after two ECAP passes along with remarkable grain refinement due to high imposed strain after the second pass. After two consecutive ECAP passes, hardness, yield strength, and tensile strength of the alloy increased significantly in comparison to initial annealed condition. The fraction of high angle boundaries (HABs) and grain misorientation angle significantly increased after ECAP passes compared to the initial condition. Texture measurements were performed by X-ray diffractometer (XRD), on TD plane (parallel to extrusion direction). Texture results revealed the dominance of C and A * 2 components after the first pass and the presence of strong B , B and Ā components along with weaker A * 2 , C components after the second pass. Scanning electron microscopy (SEM) revealed that the average dimple size was gradually reduced with increasing the ECAP passes.

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Tensile and compressive deformation behaviors of commercially pure Al processed by equal-channel angular pressing with different dies

Cited by 30 publications

References 33 publications

Micro‐Forming Using Ultrafine‐Grained Aluminum Processed by Equal‐Channel Angular Pressing

Micro‐Forming Using Ultrafine‐Grained Aluminum Processed by Equal‐Channel Angular Pressing

Experimental Investigation of the Equal Channel Forward Extrusion Process

Development of ultrafine grained Al–Zn–Mg–Cu alloy by equal channel angular pressing: microstructure, texture and mechanical properties

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