Accession Number:

ADA285862

Title:

Corrosion Behavior of Landing Gear Steels

Descriptive Note:

Phase rept.

Corporate Author:

NAVAL AIR WARFARE CENTER AIRCRAFT DIV WARMINSTER PA AIR VEHICLE AND CREW SYSTEMS TECHNOLOGY DEPT

Personal Author(s):

Report Date:

1993-10-29

Pagination or Media Count:

24.0

Abstract:

A study was conducted on the corrosion behavior of an AerMet 100 steel and a 300M steel. This study included investigations of stress corrosion cracking SCC, immersion corrosion, salt spray corrosion, and humidity corrosion of both steels. For the SCC investigation, double cantilever beam DCB specimens were employed, and for the immersion, salt spray, and humidity corrosion investigations, sheet specimens were used. The SCC rate is less and the threshold stress intensity for stress corrosion KSubSCC is greater in the AerMet 100 steel 33 ksiin less than l2 than in the 300M steel 19 ksiin less than 12, indicating better SCC resistance of the AerMet 100 steel. In the AerMet 100 steel, the stress corrosion crack grows along an intergranular and transgranular path in the direction of forging deformation. The immersion corrosion and salt spray corrosion rates of the AerMet 100 steel is 33 - 40 and 13 - 20 of those for the 300M steel, respectively. Evidence of humidity corrosion is not detectable in the AerMet 100 steel within the employed test period 110 days, whereas it is substantial 2.0413 mpy or 0.0447 mdd in the 300M steel. The overall results indicate that the AerMet 100 steel is superior to the 300M steel with respect to the corrosion resistance as well as the mechanical properties. AerMet 100 and 300M steel, Stress corrosion cracking, SCC, Double Cantilever Beam, DCB

Subject Categories:

  • Aircraft
  • Properties of Metals and Alloys
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE