Paper Title:
Entire Symmetric Structure Inchworm-Type Piezoelectric Linear Actuator
  Abstract

The feature of the hot cracks of the welding joint of the MIG welded magnesium alloy AZ91D was studied systematically. The result indicates that the weld of the magnesium alloy displays a high cracking susceptibility. The cracks are mainly formed on the centerline of the weld and in the arc crater at the end of the weld. These cracks propagate along the α-Mg grain boundary, and they belong to the solidification cracking. These solidification cracks are resulted by the joint function of the low melting point liquid film in the weld and the tensile stress suffered by the weld metal during the solidification process. The low melting point liquid film is the internal cause to form the solidification cracks, while the tensile stress is a necessary condition. Limiting the amount of the low melting point eutectic and decreasing the tensile stress of the welding joint are two effective methods to improve the solidification cracking susceptibility of the Mg alloy weld.

  Info
Periodical
Key Engineering Materials (Volumes 480-481)
Edited by
Yanwen Wu
Pages
1061-1064
DOI
10.4028/www.scientific.net/KEM.480-481.1061
Citation
H. Z. Zhang, J. T. Shi, D. X. Sun, "Entire Symmetric Structure Inchworm-Type Piezoelectric Linear Actuator", Key Engineering Materials, Vols. 480-481, pp. 1061-1064, 2011
Online since
June 2011
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Price
$32.00
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