Equal channel angular extrusion for tube configuration of Al-Zn-Mg-Cu alloy

Ebrahimi, Mahmoud; Shaeri, M.H.; Naseri, Reza; Göde, Ceren

doi:10.1016/j.msea.2018.06.080

Cited by 29 publications

(8 citation statements)

References 54 publications

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“…The aims of using of bimetallic billet are reducing the forming load, improvement of mechanical properties and uniformity in the strain distribution and consequently deformation in the core material (CP-Ti) and finally obtaining the homogenous structures. [38][39][40][41] According to the geometry of used ECAP die, the work-piece length, core diameter and the outer diameter of the casing were considered 100 mm, 10 mm and 15 mm, respectively. In addition, it should be noted that the core material (billet) was inserted into the casing with an interference fit.…”

Section: Methodsmentioning

confidence: 99%

Corrosion-fatigue resistance of ultrafine grain commercially pure titanium in simulated body fluid

Naseri

Hiradfar

Shariati

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Commercially pure titanium (CP-Ti) due to excellent biocompatibility and high specific strength is known as a metallic biomaterial and is widely utilized in medical applications as implant material. Because of low strength of CP-Ti as compared to other bio-metals, it has been proved in literatures that applying equal channel angular pressing (ECAP) process can be useful to enhancement of mechanical and metallurgical properties of CP-Ti by improvement of initial microstructure to ultrafine grained (UFG). Implant in human body is attacked from cyclic fatigue loads and corrosion, simultaneous. Hence, aim of this study is examination of corrosion-fatigue resistance of CP-Ti before and after introducing ECAP in simulated body fluid (SBF) as a saline solution close to blood plasma. In this study, multi-pass ECAP is conducted on CP-Ti at room temperature and then the axial fatigue test is performed in SBF environment with temperature 37 °C. The comparison of stress-cycle curves demonstrated that corrosion-fatigue resistance of ECAPed CP-Ti is extremely higher than initial annealed one. Moreover, it was observed that by increasing the pass number of ECAP, corrosion-fatigue resistance improves significantly. Furthermore, these results are compared to fatigue behavior of CP-Ti in air environment. The results show that corrosion-fatigue resistance of unECAPed and ECAPed CP-Ti in SBF is slightly lower than fatigue ones in air. According to the results of this experimental research, it is concluded that UFG CP-Ti has an awesome corrosion-fatigue resistance in human body and it is very suitable for utilizing as material of implants.

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Section: Methodsmentioning

confidence: 99%

Corrosion-fatigue resistance of ultrafine grain commercially pure titanium in simulated body fluid

Naseri

Hiradfar

Shariati

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…The presence of impurities and inclusions in Al-Mg (5XXX) alloys can lead to deficient stability, poor quality, and low performance of the final product, so the purification process of Al alloys with high Mg content is of great importance. Also, the presence of any impurities in various Al-based alloys can affect the resultant properties, such as fatigue, monotonic and dynamic mechanical properties, etc, and even the performance of utilized processing methods, including severe plastic deformation, extrusion, corrosion, etc [56][57][58][59][60][61][62]. In this regard, Ma et al [63] studied the melt purification process and the effect of the various refiners on the defects generation and microstructure of 5083 alloys.…”

Section: Al-mg Alloysmentioning

confidence: 99%

Melt refining and purification processes in Al alloys: a comprehensive study

Wu¹,

Djavanroodi²,

Göde³

et al. 2022

Mater. Res. Express

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Aluminum and its alloys having lots of advantageous properties are among the most-used metallic materials. So, it is of immense importance to find suitable processes and methods leading to high-quality purified Al melt. In this regard, there are numerous challenges in achieving high purity Al melts, such as its propensity to react with air, oxygen, and water vapor, the presence of a variety of oxide, non-oxide, and solid particle inclusions that lead to the production of pores, cracks, pinholes, and dross, finally adversely influencing the overall quality of the product. The main methods of melt refining are fluxing, floatation, and filtration, but more sophisticated methods have also emerged. The best method for purification can be chosen based on the type of impurities and the desired level of purification. With the industrial development, the need to establish more cost-effective and simpler methods has increased, and in addition, methods should be considered for recycling large volumes of scarp Al parts that contain more impurities. Moreover, achieving high purity melt is also a vital issue for use in specific applications. The present article has been written to discuss the above issues and focus on the study of various methods of aluminum purification.

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“…Wu et al [ 11 ] fabricated a nanolaminate 7085 alloy with an average thickness of 27 nm by surface mechanical grinding, and the hardness increased to 2.86 GPa. Ebrahimi et al [ 12 ] also reported the formation of an ultrafine grain structure during equal channel angular extrusion, which led to the increased strength and hardness of the Al-Zn-Mg-Cu alloy. Zhang et al [ 13 ] significantly increased the mechanical properties of the 7085 alloy through cryo-rolling and peak aging treatment.…”

Section: Introductionmentioning

confidence: 99%

Effects of Deformation at High, Medium, and Cryogenic Temperatures on the Microstructures and Mechanical Properties of Al-Zn-Mg-Cu Alloys

Zhang

Huang

et al. 2022

Materials

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Thermomechanical treatment is an effective way to refine the coarse microstructures of aluminum alloys. In this work, multiaxial forging deformation at high, medium, and cryogenic temperatures (i.e., 450, 250, and −180 °C, respectively) was performed on 7085 Al–Zn–Mg–Cu alloys, and its effect on the microstructure evolution and mechanical properties during the subsequent T6 heat treatment process was studied. The results revealed that the coarse particles were broken into finer particles when deformed at cryogenic temperatures, promoting the dissolution of the material after solid solution treatment. Dynamic recrystallization occurred when deformed at 450 °C; however, more dislocations and substructures were found in the samples deformed at 250 and −180 °C, causing static recrystallization after solid solution treatment. The cryogenic deformed sample exhibited a more intense and homogeneous precipitation phase distribution. The strength of the sample deformed at high temperature was high, but its elongation was low, while the strength of the sample deformed at medium temperature was low. The microstructure refinement of the cryogenic deformed sample led to high comprehensive mechanical properties, with an ultimate tensile strength of 535 MPa, a yield strength of 506 MPa, and a fracture elongation of 11.1%.

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Equal channel angular extrusion for tube configuration of Al-Zn-Mg-Cu alloy

Cited by 29 publications

References 54 publications

Corrosion-fatigue resistance of ultrafine grain commercially pure titanium in simulated body fluid

Corrosion-fatigue resistance of ultrafine grain commercially pure titanium in simulated body fluid

Melt refining and purification processes in Al alloys: a comprehensive study

Effects of Deformation at High, Medium, and Cryogenic Temperatures on the Microstructures and Mechanical Properties of Al-Zn-Mg-Cu Alloys

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