Accession Number:

ADP005929

Title:

Fatigue and Fracture Behavior of a PM Al-Li Alloy,

Descriptive Note:

Corporate Author:

INDUSTRIEANLAGEN-BETRIEBSGESELLSCHAFT M B H OTTOBRUNN (GERMANY F R)

Personal Author(s):

Report Date:

1989-08-01

Pagination or Media Count:

13.0

Abstract:

The fatigue life, fatigue crack, growth behaviour and fracture toughness properties of the experimental mechanically alloyed Aluminium-Magnesium-Lithium alloy Al 905 XL were investigated. This material has been developed, above all, for being fabricated into structural components by forging. HCF High Cycle Fatigue as well as LCF Life-Cycle Fatigue date were determined at room temperature and elevated temperature 180 C. Crack growth rates have been measured including near threshold behaviour. The mean values of fatigue life at room temperature have been found to be slightly better than the values of conventional high strength aluminium alloys. Internal defects, however, like inclusions or pores, may reduce fatigue life considerably. AT 180 C fatigue strength decreased to approximately 60 of room temperature values. Crack propagation was noticeably faster in Al 905 XL than in conventional ingot alloy 7075, for example. Keywords Alloys, Metallurgy, FatigueMechanics, FractureMechanics, Powder metallurgy, Al 905 XL, West Germany. JG

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE