Practical failure analysis

, Volume 1, Issue 1, pp 65–76 | Cite as

Effect of Prior Processing on the Performance of PH 13-8 Mo Stainless Steel Helicopter Components

  • Marc S. Pepi
  • Scott M. Grendahl
  • Victor K. Champagne
Article
  • 104 Downloads

Abstract

The purpose of this investigation was to determine the root cause of the differences noted in the fatigue test data of main rotor spindle assembly retaining rods fabricated from three different vendors, as part of a “Second Source” evaluation process. ARL performed dimensional verification, accessed overall workmanship, and measured the respective surface roughness of the rods in an effort to identify any discrepancies. Next, mechanical testing was performed, followed by optical and electron microscopy, and chemical analysis. Finally, ARL performed laboratory heat treatments at the required aging temperature and follow-up mechanical testing.

Keywords

Fatigue Ferrite Fracture Surface Shear Angle Delta Ferrite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© ASM International 2001

Authors and Affiliations

  • Marc S. Pepi
    • 1
  • Scott M. Grendahl
    • 1
  • Victor K. Champagne
    • 1
  1. 1.U.S. Army Research Laboratory, Weapons and Materials Research Directorate, Building 4600, AMSRL-WM-MDAberdeen Proving Ground, MD 21005-5069USA

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