Coupling of ultrasounds with the Portevin-Le Chatelier serrations as observed in aluminium-magnesium alloy in mini-samples tensile tests

被引：13

作者：

Brynk, Tomasz ^{[1
]}

Kurzydlowski, KrzysztofJ ^{[2
]}

机构：

[1] Warsaw Univ Technol, Fac Mat Sci & Engn, Woloska 141 St, PL-02507 Warsaw, Poland

[2] Bialystok Tech Univ, Fac Mech Engn, Wiejska 45C St, PL-15351 Bialystok, Poland

来源：

SCRIPTA MATERIALIA | 2020年 / 174卷

关键词：

Aluminium alloys; Portevin-Le Chatelier effect; Dynamic strain ageing; Acoustic methods; Eddy current;

D O I：

10.1016/j.scriptamat.2019.08.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This work presents the first observation of ultrasound and eddy currents coupling with Portevin-Le Chatelier serrations during tensile straining of aluminium-magnesium alloy small-size samples, of a gauge section 5.0 x 0.8 x 0.6 mm(3). Significant changes in serration characteristics were detected and quantified using Fast Fourier Transform analyses in the 120-160 MPa stress range under the influence of 2.5 and 5.0 MHz ultrasound, and a 60 kHz eddy current. Digital Image Correlation measurements showed that the change in singular slip bands movement is surprisingly regular all along the sample gauge sections accompanied with a reduction in the serrations' frequency. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

收藏

页码：14 / 18

页数：5

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