Microstructural characterization of ultrasonically welded aluminum

被引：27

作者：

Allameh, SM ^{[1
]}

Mercer, C

Popoola, D

Soboyejo, WO

机构：

[1] No Kentucky Univ, Dept Technol, Highland Hts, KY 41076 USA

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[3] Zimmer Inc, Warsaw, IN 46581 USA

[4] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA

[5] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA

来源：

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME | 2005年 / 127卷 / 01期

关键词：

D O I：

10.1115/1.1836792

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The microstructure and mechanical properties of ultrasonically welded AA6111-T4 specimens are discussed. The effects of welding time on the mechanical properties of welded joints are investigated. A longer welding time results in a more continuous welded interface and higher yield and fracture strengths. Accordingly, fatigue properties of the welded specimens with longer welding times are improved. The results of electron microscopy on the cross section of ultrasonically welded joints show three distinct zones: weld zone, weld affected zone and compression zone each with a distinct microstructure. TEM results show nanocrystalline grains along with second phase particles in the range of 15-25 nut in the weld zone. Flow patterns consistent with the geometry of weld-tip were observed at the weld interface.

引用

页码：65 / 74

页数：10

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