TITLE

Study on the strength and elongation of free-standing Al beams for microelectromechanical systems applications

AUTHOR(S)
Hoo-Jeong Lee; Ping Zhang; Bravman, John C.
PUB. DATE
February 2004
SOURCE
Applied Physics Letters;2/9/2004, Vol. 84 Issue 6, p915
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This letter reports a study on the strength and elongation of Al in the form of micrometer-scale, free-standing beams. We fabricated microtensile specimens of Al beams by using a simple micromachining process and carried out uniaxial tensile tests in a mechanical test system with a piezoelectric actuator that controls the displacement as small as a few nanometers. The results of the tests suggest that, if the grain size remains the same, the yield strength does not change with the thickness whereas the elongation varies with it very sensitively. In addition, the yield strength of the Al beams is found to be much smaller than that of Al films bonded onto Si substrates but somewhat larger than that of the bulk Al estimated for a comparable grain size from the Hall–Petch relation. © 2004 American Institute of Physics.
ACCESSION #
12141838

 

Related Articles

  • Microscale resin-bonded permanent magnets for magnetic micro-electro-mechanical systems applications. Cho, Hyoung J.; Ahn, Chong H. // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p8674 

    A micromachining technique has been developed for the fabrication of microscale resin-bonded permanent magnets. Magnetic paste has been prepared from Sr-ferrite powder and an epoxy resin, filled into lithographically defined molds, and formed into resin-bonded magnets after room temperature...

  • Dynamic mechanical properties of aluminum alloys GIGAS. Shor, Alexander; Zaretsky, Eugene; Ohtera, Katsumasa; Sasoh, Akihiro; Takayama, Kazuyoshi // AIP Conference Proceedings;2000, Vol. 505 Issue 1, p497 

    New high-strength aluminum alloys of YKK Corporation, GIGAS-30 and GIGAS-51 were studied in plane impact experiments with impact velocities ranged from 100 to 500 m/sec. The projectiles with 2-mm flat impactors were accelerated in 25-mm powder (SWRC) and 25-mm pneumatic (BGU) guns. In parallel...

  • Dynamic deformation behavior of ultrafine grained aluminum produced by ARB and subsequent annealing. Takata, Naoki; Okitsu, Yoshitaka; Tsuji, Nobuhiro // Journal of Materials Science;Dec2008, Vol. 43 Issue 23/24, p7385 

    Commercial purity aluminum (1100-Al) sheets with various grain sizes, ranging from 0.2 to 10 μm, were fabricated through accumulative roll bonding (ARB) and subsequent annealing at various temperatures. Mechanical properties of these materials were examined at various strain rates ranging...

  • Perforation of 7075-T651 Aluminum Armor Plates with 7.62 mm APM2 Bullets. Forrestal, M.; Børvik, T.; Warren, T. // Experimental Mechanics;Dec2010, Vol. 50 Issue 8, p1245 

    We conducted an experimental and analytical study to better understand the mechanisms and dominant parameters for 7.62 mm APM2 bullets that perforate 7075-T651 aluminum armor plates. The 7.62-mm-diameter, 10.7 g, APM2 bullet consists of a brass jacket, lead filler, and a 5.25 g, ogive-nose, hard...

  • Joining Dissimilar Aluminum Alloys. Okamoto, Kazutaka; Hirano, Satoshi; Inagaki, Masahisa // Welding Journal;Apr2006, Vol. 85 Issue 4, p38 

    The article reports on the examination of the mechanical properties and weldability of A5052 plate and A360 cast aluminum friction stir welded together. The tensile strength of the A505 2-H34 joint depends on the welding speed while the tensile strength of A360-F joint increases with high...

  • High-Strength Weldable Alloy 1970 Based on the Al - Zn - Mg System. Zakharov, V.; Rostova, T. // Metal Science & Heat Treatment;Mar2005, Vol. 47 Issue 3/4, p131 

    In the 1980s researchers of the All-Russia Institute of Light Alloys and the “Komposit” Research and Production Association developed a high-strength weldable corrosion-resistant alloy based on the Al - Zn - Mg - Cu - Sc - Zr system. The alloy was graded 1970 and used for fabricating...

  • Microstructure-Properties Relationship in Two Al-Mg-Si Alloys through a Combination of Extrusion and Aging. Cai, M.; Cheng, Gary J. // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Aug2007, Vol. 59 Issue 8, p58 

    Aluminum alloys containing magnesium and silicon as the major solutes are strengthened by precipitation of the metastable precursors (β") of the equilibrium β (Mg2Si) phase. In this study, dynamic aging of two Al-Mg-Si alloys--the 6061 (Al- 1.34% Mg2Si) and 6069 (Al-2.25% Mg2Si)...

  • Homogeneity of Mechanical Properties of Underwater Friction Stir Welded 2219-T6 Aluminum Alloy. Liu, H.; Zhang, H.; Yu, L. // Journal of Materials Engineering & Performance;Nov2011, Vol. 20 Issue 8, p1419 

    Underwater friction stir welding (FSW) has been demonstrated to be available for the improvement in tensile strength of normal FSW joints. In order to illuminate the intrinsic reason for strength improvement through underwater FSW, a 2219 aluminum alloy was underwater friction stir welded and...

  • Surface Integrity of Shot Peened Aluminium Alloy 7075-T651. Zupanc, Uroš; Grum, Janez // Strojniski Vestnik / Journal of Mechanical Engineering;May2011, Vol. 57 Issue 5, p379 

    The objective of the present study was to investigate the effect of surface hardening by shot- peening (SP) on fatigue properties of high-strength aluminium alloy 7075-T651. The paper describes the effects of SP treatment by presenting analyses of surface roughness measurement, microhardness...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics