Influence of Material State at a Crack Tip on the Process of Fatigue Striations Formation for Al-Based Alloys

A.A. Shaniavski

doi:10.4028/www.scientific.net/MSF.482.235

Paper Titles

Phase Composition and Microstructure Stability of Al-Ni-Zr Alloys
p.219

Interaction of a Crack in the Plasma-Sprayed Ceramic Coating with the Metal Substrate
p.223

3D Visualisation of Short Crack Propagation in Al Alloy Using High Resolution Synchrotron X-Ray Microtomography
p.227

Identification and Modelling of the Behaviour of a Duplex Stainless Steel by Methods of Scale Changing
p.231

Influence of Material State at a Crack Tip on the Process of Fatigue Striations Formation for Al-Based Alloys
p.235

Grain Size Estimation in Anisotropic Materials
p.239

Application of Silicon for a Protection of Titanium against High-Temperature Oxidation
p.243

Biocompatibility of Carbon Layer on Polymer
p.247

Biocompatibility of Polyethylene Doped with Oxycellulose
p.251

HomeMaterials Science ForumMaterials Science Forum Vol. 482Influence of Material State at a Crack Tip on the...

Influence of Material State at a Crack Tip on the Process of Fatigue Striations Formation for Al-Based Alloys

Abstract:

Fatigue fracture features such as pseudo- and fatigue striations were investigated for the Al-alloys AL-Si-Mg and Acoustic Emission (AE) was used to analyze plastic deformation processes ahead of a crack tip. Dramatic change of fatigue striations spacing was demonstrated in accordance with AE-signals evolution. Specimens with fatigue crack have not macroscopic significance in plastic deformation process under tension up to the fast fracture when striation spacing is over 2.1x10-7 m. Mechanisms of material deformation and fracture around of a crack tipduring fatigue striations formation process are discussed on the bases of the synergistic approach.