|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||Damage tolerant Al/Al-LMCs -
In-situ characterization of prevalent toughening mechanisms using a large-chamber SEM
||Philip Manuel Pohl, Heinz Werner Höppel, Mathias Göken
|On-Site Speaker (Planned)
||Philip Manuel Pohl
Laminated metal composites (LMCs) can be tailored towards the exhibition of a variety of extrinsic toughening mechanisms based on material inhomogeneity effects at interfaces and thus show promising potential for applications in damage tolerant components.
In this paper, fatigue crack growth behavior (FCG) in LMCs consisting of different Al-alloys with dissimilar yield strength (AA1050/AA5754 and AA5005/AA5754) manufactured using accumulative roll bonding (ARB) has been investigated in detail.
The prevalent toughening mechanisms leading to enhanced damage tolerant fatigue properties of these LMCs compared to their monolithic constituent materials were identified as (a) crack deflection when the crack approaches interfaces from softer towards stronger layers and (b) crack bifurcation for the opposite case. Using in-situ experiments inside a large-chamber SEM, the evolution of the respective toughening mechanisms and their effects on the local FCG rate at the vicinity of interfaces are studied at given levels of constant far-field stress intensity ranges ΔK.
||Other, Other, Other