Metallurgical Quality Control of Aged 7075 Al Alloy Using Eddy Current Nondestructive Testing Method

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HOSSEINI SEYED AMIR; ABBASI MAJID

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Journal: Non-Destructive Testing Technology Year:2020 | Volume:2 | Issue:6 Page(s): 26-35

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Title

Metallurgical Quality Control of Aged 7075 Al Alloy Using Eddy Current Nondestructive Testing Method

Author(s)

HOSSEINI SEYED AMIR | ABBASI MAJID | Issue Writer Certificate

Keywords

Nondestructive Evaluation

Eddy Current Testing

Quality Control

Aging

7075 Al Alloy

Abstract

The eddy current nondestructive testing (ECT) is one of the electromagnetic methods that can be used to evaluate and control the metallurgical quality of industrial alloys. The rapid implementation and digital nature of the answers have led to its use in setting up automatic inspection and Quality Control lines. The purpose of this paper is to investigate the metallurgical Quality Control conditions of 7075 aluminum alloy sheets after Aging heat treatment using the ECT method. For this purpose, the destructive tests of metallography, hardness and electrical conductivity were performed along with the eddy currents Nondestructive testing and then their data were compared with each other. The sheet samples of this alloy were prepared in the form of a 1. 2 mm thickness. The solution heat treatment was performed at 470 centigrade for 20 minutes and then artificial Aging heat treatment was performed at different temperatures and times. Microstructural studies were performed by optical and scanning electron microscopes, standard conductivity (% ICAS) and Brinell hardness methods. Then, using a eddy current apparatus at 8 kHz, the electromagnetic responses of the samples were evaluated and compared. The results showed that to Quality Control and assurance of the aged products, the use of hardness index alone cannot suffice. In addition, the metallographic method has executive limitations in production processes. It was found that the eddy current responses are affected by microstructural changes resulting from Aging process. Using this method, different parts of 7075 aluminum alloy can be Nondestructively separated from each other.

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APA: Copy

HOSSEINI, SEYED AMIR, & ABBASI, MAJID. (2020). Metallurgical Quality Control of Aged 7075 Al Alloy Using Eddy Current Nondestructive Testing Method. NONDESTRUCTIVE TESTING TECHNOLOGY, 2(6 ), 26-35. SID. https://sid.ir/paper/382846/en

Vancouver: Copy

HOSSEINI SEYED AMIR, ABBASI MAJID. Metallurgical Quality Control of Aged 7075 Al Alloy Using Eddy Current Nondestructive Testing Method. NONDESTRUCTIVE TESTING TECHNOLOGY[Internet]. 2020;2(6 ):26-35. Available from: https://sid.ir/paper/382846/en

IEEE: Copy

SEYED AMIR HOSSEINI, and MAJID ABBASI, “Metallurgical Quality Control of Aged 7075 Al Alloy Using Eddy Current Nondestructive Testing Method,” NONDESTRUCTIVE TESTING TECHNOLOGY, vol. 2, no. 6 , pp. 26–35, 2020, [Online]. Available: https://sid.ir/paper/382846/en

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