Understanding precipitate evolution during friction stir welding of Al-Zn-Mg-Cu alloy through in-situ measurement coupled with simulation

被引：70

作者：

dos Santos, J. F. ^{[1
]}

Staron, P. ^{[1
]}

Fischer, T. ^{[1
]}

Robson, J. D. ^{[2
]}

Kostka, A. ^{[3
,5
,6
]}

Colegrove, P. ^{[4
]}

Wang, H. ^{[1
,4
]}

Hilgert, J. ^{[1
]}

Bergmann, L. ^{[1
]}

Huetsch, L. L. ^{[1
]}

Huber, N. ^{[1
]}

Schreyer, A. ^{[1
,7
]}

机构：

[1] Helmholtz Zentrum Geesthacht, Inst Mat Res, Mat Mech, Max Planck Str 1, D-21502 Geesthacht, Germany

[2] Univ Manchester, Sch Mat, Oxford Rd, Manchester M13 9PL, Lancs, England

[3] Max Planck Inst Eisenforsch GmbH, Dpt Microstruct Phys & Alloy Design, Max Planck Str 1, D-40237 Dusseldorf, Germany

[4] Cranfield Univ, Welding Engn Res Ctr, Cranfield MK23 0AP, Beds, England

[5] Ruhr Univ Bochum, Mat Res Dept, Bochum, Germany

[6] Ruhr Univ Bochum, Ctr Interface Dominated Mat ZGH, Bochum, Germany

[7] European Spallat Source ERIC, Sci, Box 176, S-22100 Lund, Sweden

来源：

ACTA MATERIALIA | 2018年 / 148卷

基金：

英国工程与自然科学研究理事会;

关键词：

Al alloy; Friction stir welding; Precipitation kinetics; Numerical modeling; Small-angle X-ray scattering; ALUMINUM-ALLOYS; THICK PLATE; 7449-ALUMINUM-ALLOY; MODEL;

D O I：

10.1016/j.actamat.2018.01.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Friction Stir Welding (FSW) imparts both heat and deformation to the metal being joined, producing profound microstructural changes that determine the weld properties. In the case of welding of aerospace aluminium alloys, the most important change is the modification of the size, nature, and fraction of strengthening precipitates. To understand these changes requires the ability to measure the micro structural evolution during the welding process. This paper describes a new tool, the FlexiStir system, a portable friction stir unit designed for use in a high-energy synchrotron beamline that enables in-situ studies of microstructural evolution during FSW. FlexiStir has been used to measure precipitate evolution during FSW of aluminium alloy 7449-TAF and provide time-resolved measurement of precipitate size and volume fraction via small angle X-ray scattering (SAXS). These measurements have been interpreted with the aid of a previously developed microstructural model. The model predictions and SAXS measurements are in good qualitative agreement and demonstrate the complex precipitate transformation, dissolution, and reprecipitation events that occur during welding. (c) 2018 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

引用

页码：163 / 172

页数：10

共 22 条

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Wang, H. ;

Colegrove, P. A. ;

dos Santos, J. .

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2013, 18 (02) :147-153

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Zettler, Rudolf ;

Donath, Tilman ;

dos Santos, Jorge F. ;

Beckman, Felix ;

Lohwasser, Daniela .

ADVANCED ENGINEERING MATERIALS, 2006, 8 (06) :487-490

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