Microscopic examination of the secondary cracking process during surface crack growth in LY12-R aluminum alloy under tensile fatigue loading was employed. Secondary cracking behaviors in three special directions were compared with each other and correlated with the macroscopic behavior of the main c
Secondary cracking process during fatigue crack propagation
โ Scribed by P. Gauthier; H. De Rabaudy; J. Auvinet
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 891 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0013-7944
No coin nor oath required. For personal study only.
โฆ Synopsis
Using the scanning electron microscope, fatigue striations in secondary microcracks normal to the main fatigue cracks have been observed on fracture surfaces of fatigue specimens made from 2024 and 2618 aluminium alloys, a Ti-6AI-V titanium alloy, and an Incolloy 901 nickel-base refractory alloy. Tentative explanations of these observations are presented in the paper togetber witb a short discussion.
๐ SIMILAR VOLUMES
Alit-Kinked, forked and twisted paths of a mode I crack cause a "local mixed" mode loading at the crack tip. The best known single parameter description of this problem is the local crack driving force &,, based on the maximum strain energy release rate. For fatigue crack propagation near the thresh
From previous investigations of the mechanisms of both fracture and fatigue crack propagation, the static fracture model proposed by Lal and Weiss may be thought as reasonable for describing fatigue crack propagation in metals at both low and interm~iate stress intensity factor ranges AK. Recent pro
## ~~-Fa~~e crack growth in resonating structural members is studied. The crack Preston rate is related to the stress intensity factor range by way of the well known power law. The depth of the crack determines the local flexibility due to crack which in turn inlluences the dynamic response of the
A least squares spline function method of estimating crack growth rates from a discrete set of experimental fatigue data is presented and an errors analysis is carried out in detail.