Corrosion fatigue behavior of AA 7020 alloy in seawater

被引：4

作者：

Yurdgulu, Halil Ibrahim ^{[2
]}

Sadeler, Recep ^{[1
]}

Yilmaz, Hasan ^{[3
]}

Koc, Baris ^{[4
]}

机构：

[1] Ataturk Univ, Engn Fac, TR-25200 Erzurum, Turkiye

[2] Ataturk Univ, Mech Engn Fac, TR-25200 Erzurum, Turkiye

[3] Giresun Municipal, Giresun, Turkiye

[4] FNSS Def Syst Inc, Ankara, Turkiye

来源：

MATERIALS TESTING | 2023年 / 65卷 / 05期

关键词：

AA; 7020; corrosion fatigue; plane bending; two-step aging; weldment; HEAT-TREATMENT; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; MICROSTRUCTURE; LIFE;

D O I：

10.1515/mt-2022-0311

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：743 / 752

页数：10

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