Practical Failure Analysis

, Volume 2, Issue 6, pp 80–84 | Cite as

Powerline tower arm failure analysis

  • Wayne Reitz
Peer Reviewed Articles
  • 77 Downloads

Abstract

Arms bolted to powerline towers were falling off two weeks after installation. Metallurgical and chemical analysis performed on the base metal, weld zone, and heat-affected zone (HAZ) showed acceptable-quality material. Residual stress appeared to be responsible for the high failure rate. The sources of residual stress included welding, environment, and assembly operation.

Keywords

ASTM A588 chemistry dimensional tolerance embrittlement fatigue heat-affected zone residual stress tensile strength weld 

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References

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    R.B. Bird, W.E. Stewart, and E.N. Lightfoot:Transport Phenomena, John Wiley and Sons, New York, NY, 1960, p. 182.Google Scholar

Copyright information

© ASM International - The Materials Information Society 2002

Authors and Affiliations

  • Wayne Reitz
    • 1
  1. 1.Mechanical EngineeringNorth Dakota State UniversityFargo

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