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Characterizing the anisotropic hardening behavior of aluminum bonding wires

Altenbach, Holm und Dresbach, Christian und Petzold, Matthias (2012) Characterizing the anisotropic hardening behavior of aluminum bonding wires. In: Materials with Complex Behaviour II Advanced Structured Materials, 16. Springer Verlag Berlin Heidelberg. Seiten 583-598. ISBN 978 3 642 22699 1. ISSN 1 869 8433

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Offizielle URL: http://dx.doi.org/10.1007/978-3-642-22700-4_36

Kurzfassung

In power electronic devices the electrical connections of different components are mainly realized by heavy aluminum wire bonding. When a device heats up or cools down during use, there is a relative displacement between the first and the second contact because of differences in thermal expansion coefficients of the components and the housing of the device. This cyclic thermo mechanical loading can lead to fatigue failure of the bonding wire. Especially when placed near mechanical working components (e.g. automotive engine) additional vibrations can increase damage evolution and heating can accelerate ageing effects of the bonding wire. In the last few years there have been multiple publications presenting experimental and numerical results for high and low cycle fatigue of wire bonded devices. But all of these publications did not consider the mechanical properties of the wire in an adequate way. We present results of a micro-compression test that allows the determination of the hardening behavior parallel and perpendicular to the wire axis at moderate and large strains of small wire cylinders. The hardening behavior in compression parallel to the wire axis correlates very well to the hardening behavior determined by tensile tests at moderate strains. The hardening behavior perpendicular to the wire axis shows an anisotropic behavior of the aluminum wires depending on the drawing texture which was also analyzed by electron backscatter diffraction methods. The results for different wire materials show a dependence of the yield stress on the grain size. With the determined hardening parameters it is possible to consider the hardening of the material during the bonding process.

Dokumentart:Beitrag im Sammelband
Titel:Characterizing the anisotropic hardening behavior of aluminum bonding wires
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Altenbach, Holmholm.altenbach@ovgu.de
Dresbach, Christianchristian.dresbach@dlr.de
Petzold, MatthiasMatthias.Petzold@iwmh.fraunhofer.de
Datum:2012
Erschienen in:Materials with Complex Behaviour II
Referierte Publikation:Ja
In ISI Web of Science:Nein
Band:16
Seitenbereich:Seiten 583-598
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Öchsner, Andreasandreas.oechsner@gmail.com
da Silva, Lucas F.M.lucas@fe.up.pt
Altenbach, Holmholm.altenbach@ovgu.de
Verlag:Springer Verlag Berlin Heidelberg
Name der Reihe:Advanced Structured Materials
ISSN:1 869 8433
ISBN:978 3 642 22699 1
Status:veröffentlicht
Stichwörter:Aluminum wire bonding - Electron backscatter diffraction - Micro compression test - Hall-Petch relation
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen & Werkstoffe
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Werkstoff-Forschung > Metallische Strukturen und hybride Werkstoffsysteme
Hinterlegt von: Dr. Christian Dresbach
Hinterlegt am:19 Jan 2012 10:17
Letzte Änderung:19 Jan 2012 10:17

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