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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
1
ISBN electronic:
978-1-62708-214-3
Publication date:
1992
Book Chapter

Corrosion Fatigue and Subsequent Rupture of a Yankee Dryer Roll on a Modified Paper Machine

By
Mark H. Gilkey
Mark H. Gilkey
Factory Mutual Research Corporation
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Published:
1992
Page range:
132 - 135

Abstract

A steam-pressurized Yankee dryer shell ruptured during normal operation. Cracking had occurred around much of the circumference at the drive end of the shell, which measured 3.7 m (12 ft) in diameter by 3.4 m (11 ft) long with a head bolted to each end. The crack initiated at a 90 deg corner in contact with the edge of the head. The material was a hardened gray cast iron containing 2.8% Ni and 1.2% Mo. Based on the results of visual, nondestructive, metallographic, and chemical analyses, it was concluded that failure occurred after corrosion fatigue cracking had weakened the shell. An ultrasonic examination of all Yankee dryers of the same type was recommended to look for cracking at the edge of the shell. Modification of the head-to-shell joint was recommended as well.

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Mark H. Gilkey, 1992. "Corrosion Fatigue and Subsequent Rupture of a Yankee Dryer Roll on a Modified Paper Machine", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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