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

• Autorzy: Ghosh Abhishek , Ghosh Manojit , Gudimetla Kondaiah , Kalsar Rajib , Kestens Leo A. I. , Kondaveeti Chandra Sekhar , Pugazhendhi Bhagat Singh , Ravisankar Balasubramanian

Identyfikatory

DOI

10.1007/s43452-019-0003-y

• Języki publikacji: EN

Abstrakty

EN

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 BC at room temperature at a pressing speed of 1 mm/min. Transmission electron microscopy (TEM) revealed the presence of rod-like (MgZn2) 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 Cθ and A∗2θ components after the first pass and the presence of strong Bθ, B¯θ and A¯θ components along with weaker A∗2θ,Cθ components after the second pass. Scanning electron microscopy (SEM) revealed that the average dimple size was gradually reduced with increasing the ECAP passes.

Słowa kluczowe

EN

7075 alloy; equal channel angular pressing; MgZn2 precipitates; grain refinement; microstructure; texture

PL

stop 7075; mikrostruktura; tekstura

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2020
• Tom: Vol. 20, no. 1
• Strony: 82--98
• Opis fizyczny: Bibliogr. 63 poz., rys., tab., wykr.

Twórcy

autor

Ghosh Abhishek

• Department of Metallurgy and Materials Engineering, Indian Institute of Engineering Science and Technology, Howrah 711103, India

autor

Ghosh Manojit

• Department of Metallurgy and Materials Engineering, Indian Institute of Engineering Science and Technology, Howrah 711103, India

autor

Gudimetla Kondaiah

• Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli, India

autor

Kalsar Rajib

• Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India

autor

Kestens Leo A. I.

• EEMMeCS Department, Metals Science and Technology Group, Ghent University, 9052 Ghent, Belgium

autor

Kondaveeti Chandra Sekhar

• Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli, India

autor

Pugazhendhi Bhagat Singh

• Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli, India

autor

Ravisankar Balasubramanian

• Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli, India

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