Accumulation of microstructural damage due to fatigue of high-strength aluminum alloys

Journal Article · Tue Feb 01 00:00:00 EST 1994 · Journal of Materials Engineering and Performance; (United States)

DOI:https://doi.org/10.1007/BF02654498· OSTI ID:7104694

Luevano, A J; Przystupa, M A; Zhang, J ^[1]

---

1. Univ. of California, Los Angeles, CA (United States). Dept. of Materials Science and Engineering

The microstructural features of aluminum alloy 7050-T7451 in the vicinity of fatigue cracks on the crack path were studied to determine which of these features influence fatigue crack propagation. The studies included characterization of the full spectrum of microstructural and fracture surface features--from the largest (e.g., roughness and grain type) to the smallest (e.g., second-phase particles and dislocations). Of all the features studied, only the second-phase particles were shown to have a definite influence by causing crack deflection. The number of particles encountered by the fatigue cracks were significantly higher than the expected average. The fatigue crack path was predominantly transgranular, and there was no change in the dislocation and precipitation structures in the crack-affected zone.

• OSTI ID: 7104694
• Journal Information: Journal of Materials Engineering and Performance; (United States), Vol. 3:1; ISSN 1059-9495
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
AEROSPACE INDUSTRY
CRACK PROPAGATION
EXPERIMENTAL DATA
FATIGUE
ALLOYS
ALUMINIUM ALLOYS
DATA
INDUSTRY
INFORMATION
NUMERICAL DATA
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies