Subsurface fatigue crack tip strains in 7475‐T7351 aluminium alloy measured using stroboscopic neutron diffraction-Reference-Cited by-同舟云学术

Subsurface fatigue crack tip strains in 7475‐T7351 aluminium alloy measured using stroboscopic neutron diffraction

Published:2023-02-17 Issue:5 Volume:46 Page:1735-1749
ISSN:8756-758X
Container-title:Fatigue & Fracture of Engineering Materials & Structures
language:en
Short-container-title:Fatigue Fract Eng Mat Struct

Author:

Coules Harry¹^ORCID,Probert Molly¹²,Azuma Kisaburo¹³,Truman Christopher¹,Seow Cui Er¹⁴,Pirling Thilo⁵,Cabeza Sandra⁵

Affiliation:

1. Faculty of Engineering, University of Bristol, Queen's Building University Walk Bristol UK

2. ISIS Neutron and Muon Source, Science and Technology Facilities Council Rutherford Appleton Laboratory Didcot UK

3. Regulatory Standard and Research Department Secretariat of Nuclear Regulation Authority Tokyo Japan

4. TWI Ltd Cambridge UK

5. Institut Max von Laue ‐ Paul Langevin (ILL) Grenoble France

Abstract

AbstractFatigue crack growth in thick‐section metals is typically controlled by an internal plane strain region where strong triaxial constraint of the crack tip occurs. However, the crack tip stress state in this region is challenging to measure. We have used neutron diffraction to study the plane strain section of fatigue crack tips in situ. A stroboscopic form of neutron diffraction using a moving frame‐of‐reference was developed to measure crack tip strains as a function of phase in the fatigue loading cycle without interrupting the cyclic load. Using point measurements of near‐tip strain in 7475‐T7351 aluminium alloy in conjunction with finite element analysis, we can estimate the extent of the crack tip plastic zone, verifying that it is small for this material and set of loading conditions.

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1111/ffe.13955

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