Investigation of the Hydrogen Embrittlement Susceptibility of AA5083-H111 and AA6082-T6 Dissimilar Friction Stir Welds

被引：1

作者：

Kyriakopoulou, H. P. ^{[1
]}

Farantos, C. N. ^{[1
]}

Vazdirvanidis, A. ^{[2
]}

Markoulis, A. G. ^{[1
]}

Xanthis, C. A. ^{[1
]}

Chatzidouros, E. V. ^{[3
]}

Pantelis, D. I. ^{[1
]}

机构：

[1] Natl Tech Univ Athens, Shipbldg Technol Lab, Sch Naval Architecture & Marine Engn, Athens, Greece

[2] ELKEME Hellen Res Ctr Met SA, Metallog & Electron Opt Dept, Oinofyta, Greece

[3] Engitec Syst Int LTD, Athens, Greece

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2019年 / 28卷 / 12期

关键词：

dissimilar metals; fracture analysis; friction stir welding; hydrogen embrittlement; MECHANICAL-PROPERTIES; INDUCED CRACKING; FRACTURE; EQUILIBRIUM; BEHAVIOR; ALLOYS; STRESS; NB;

D O I：

10.1007/s11665-019-04489-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present study focused on the evaluation of the hydrogen embrittlement susceptibility of dissimilar friction stir welds of AA5083-H111 and AA6082-T6 aluminum alloys. Electrochemical cathodic charging and slow strain rate tensile method were performed to investigate the embrittlement effect of diffused hydrogen cations into the polycrystalline matrices. The main embrittlement mechanisms were studied for applied current densities of 20, 50 and 80 mA/cm(2) and duration of cathodic charging effect for 2 and 4 h. The slow strain rate tensile tests were performed with a strain rate of 2.4 x 10(-4) s(-1) in order to promote hydrogen migration effect to critical sites (deep traps). With the increment in applied current density from 20 to 80 mA/cm(2), a severe reduction in ductility and a lower decrease in yield stress and ultimate tensile strength were observed. The fractured surfaces were characterized by increased volume fraction of embrittling features such as river patterns, quasi-cleavage facets and teardrop ridges.

引用

页码：7687 / 7701

页数：15

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