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- Title
Investigation into the anisotropic damage behavior of LA103Z Mg‐Li alloy rolling sheet using X‐ray computed tomography and numerical modeling.
- Authors
Xu, Sinuo; Qian, Lingyun; Ma, Tengyun; Sun, Chaoyang; Wang, Chunhui; Feng, Yinghao; Zhou, Yu
- Abstract
The anisotropic damage behavior has a great influence on the formability of rolling sheets. This work aimed to investigate the anisotropic damage mechanism of the LA103Z Mg‐Li alloy rolling sheet by combining mesoscale detection and modeling. The X‐ray computed tomography (XCT) and scanning electron microscope (SEM) were applied to characterize the evolution of damage morphology and volume fraction in RD, DD, and TD directions of the rolling sheet. The GTN damage model was calibrated by the experimental results with the representative volume element (RVE) method. The anisotropic damage mechanism was revealed via experimental and modeling results. The micro void nucleation strain εN was critical to determine the initiation moment of the anisotropic damage. The continuous nucleation in RD direction, the severe growth in DD direction, and the massive coalescence in TD direction were the micro void evolution competition results that caused the anisotropy for damage mechanism and fracture strain. Highlights: The micro void evolution was quantitatively characterized by XCT and SEM methods.The GTN damage model calibrated by the RVE method exhibited accurate prediction.εN was the critical strain for determining the initiation of anisotropic damage.Anisotropic damage was caused by different responses of micro void evolution.
- Subjects
COMPUTED tomography; DUCTILE fractures; DAMAGE models; SCANNING electron microscopes; MICROEVOLUTION; ALLOYS
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2024, Vol 47, Issue 3, p662
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.14202