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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

Analysis of Music Wire Springs Used in a Printer Mechanism

By
Michael Neff
Michael Neff
SEAL Laboratories
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Published:
1993
Page range:
451 - 454

Abstract

Music wire springs used in a printer return mechanism failed near the bend in the hook portion of the spring during qualification testing. Samples were examined in a scanning electron microscope equipped with an energy-dispersive x-ray microprobe. Fatigue fractures originated at rub marks on the inside edge of the spring. An investigation of loads encountered in service indicated that the springs had been loaded to a large fraction of the yield strength. Redesign of the spring mechanism was recommended.

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Michael Neff, 1993. "Analysis of Music Wire Springs Used in a Printer Mechanism", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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