Koko, A; Salim, D; Leung, N; Spetsieris, N; Smith, S; England, D; Sui, T; Fry, T (2025) Exploring short crack behaviour and fracture transition in 5052 aluminium alloy. Results in Engineering, 26. 105303 ISSN 25901230

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Abstract

This study, employing in-situ scanning electron microscopy, electron backscatter diffraction, and digital image correlation, investigates the crack-length dependency of the quasi-brittle to ductile transition in 5052 aluminium alloy. A compact tension sample with {110} texture was examined, revealing crack propagation on 111 and 111 transgranular cleavage planes and non-coherent paths under low-stress intensity factors (SIFs), with a maximum of 7.72 ± 0.09 MPa.m0.5 compared to the typical KIC of 25 MPa.m0.5. Crack growth was influenced by double-slip mechanisms and significant resistance at Σ33 grain boundaries. After crack arrest, SIFs derived from the local displacement field revealed a transition from microstructure-sensitive to nominal load-driven crack growth conditions.

Item Type:	Article
Keywords:	5052 aluminium alloy; Crack propagation; Stress intensity factor; Digital image correlation; Microstructure-sensitive fracture
Subjects:	Advanced Materials > Microstructural Characterisation
Divisions:	Materials and Mechanical Metrology
Identification number/DOI:	10.1016/j.rineng.2025.105303
Last Modified:	12 Mar 2026 15:50
URI:	https://eprintspublications.npl.co.uk/id/eprint/10314