Microstructural investigation friction stir welded 7050-T651 aluminium

被引：885

作者：

Su, JQ

Nelson, TW

Mishra, R

Mahoney, M

机构：

[1] Brigham Young Univ, Dept Mech Engn, Provo, UT 84602 USA

[2] Univ Missouri, Dept Mat Sci, Rolla, MO 65401 USA

[3] Rockwell Int Sci Ctr, Thousand Oaks, CA 91360 USA

来源：

ACTA MATERIALIA | 2003年 / 51卷 / 03期

关键词：

friction stir welding; aluminum alloy; microstructures; dynamic recrystallization; transmission electron microscopy (TEM);

D O I：

10.1016/S1359-6454(02)00449-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The grain structure, dislocation density and second phase particles in various regions including the dynamically recrystallized zone (DXZ), thermo-mechanically affected zone (TMAZ), and heat affected zone (HAZ) of a friction stir weld aluminum alloy 7050-T651 were investigated and compared with the unaffected base metal. The various regions were studied in detail to better understand the microstructural evolution during friction stir welding (FSW). The microstructural development in each region was a strong function of the local thermo-mechanical cycle experienced during welding. Using the combination of structural characteristics observed in each weld region, a new dynamic recrystallization model has been proposed. The precipitation phenomena in different weld regions are also discussed. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：713 / 729

页数：17

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