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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
Volume
2
ISBN electronic:
978-1-62708-215-0
Publication date:
1993
Book Chapter

Mechanical Failure of a Repair Welded Ferritic Malleable Cast Iron Spring Hanger

By
Alan A. Johnson
Alan A. Johnson
University of Louisville
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;
Joseph A. von Fraunhofer
Joseph A. von Fraunhofer
University of Louisville
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Published:
1993
Page range:
76 - 78

Abstract

The right front spring hanger on a dual rear axle of the tractor of a tractor-trailer combination failed, causing the vehicle to roll-over. The hanger was made from malleable cast iron that had been heat treated to produce a decarburized surface layer and a pearlitic transition layer. It had been repair welded after breaking into two pieces longitudinally in a prior incident, using cast iron as weld metal. The repair weld bead on both surfaces missed the fracture over 15 to 20% of their lengths. The incomplete repair weld and brittleness of the weld metal and heat-affected zones led to the failure.

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Alan A. Johnson, Joseph A. von Fraunhofer, 1993. "Mechanical Failure of a Repair Welded Ferritic Malleable Cast Iron Spring Hanger", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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