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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 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.

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Wayne Reitz, Ph.D., 2019. "Powerline Tower Arm Failure Analysis", ASM Failure Analysis Case Histories: Buildings, Bridges, and Infrastructure

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