Corrosion fatigue behavior of AA 7020 alloy in seawater-Reference-Cited by-同舟云学术

Corrosion fatigue behavior of AA 7020 alloy in seawater

Published:2023-04-13 Issue:5 Volume:65 Page:743-752
ISSN:0025-5300
Container-title:Materials Testing
language:en
Short-container-title:

Author:

Yurdgulu Halil Ibrahim¹,Sadeler Recep²^ORCID,Yilmaz Hasan³,Koc Baris⁴

Affiliation:

1. Ataturk University, Mechanical Engineering Faculty , Erzurum , 25200 , Türkiye

2. Atatürk Üniversitesi Mühendislik Fakültesi , Erzurum , Türkiye

3. Giresun Municipality , Giresun , Türkiye

4. FNSS Defense Systems Inc. , Ankara , Türkiye

Abstract

Abstract The effect of two-step aging treatment on the fatigue behavior of welded AA 7020 Al. alloy was investigated. For fatigue tests to be carried out in atmospheric and seawater environments, a plane bending tester at a stress ratio of R = 0 was used. Experiments in the control group were carried out with unwelded specimens at a strain rate of R = −1 in air. The gradual heat treatment, two-step aging, significantly improved the fatigue and corrosion fatigue behavior of welded AA 7020 alloys. Unwelded specimens showed better fatigue properties than the welded ones. In the experiments in the seawater environment, pitting, and exfoliation corrosion occurred on the surfaces. It was determined that the corrosion pits reduce the fatigue life of welded and unwelded specimens. It was also observed that the corrosion sensitivity of the welded specimens increased in the heat affected zone and resulted in corrosion fatigue cracking.

Publisher

Walter de Gruyter GmbH

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.degruyter.com/document/doi/10.1515/mt-2022-0311/pdf

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