Intergranular Fatigue

doi:10.1002/9781118603031.ch5

Cited by 2 publications

(2 citation statements)

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“…24 The intricacy of the microstructures in terms of morphology and arrangement of phases and crystallographic relationships manifests itself in the mechanisms of accommodation of plastic deformation. This localisation 25 is believed to be directly related to the grains favourably oriented for slip within the specimen. The hcp metals can show considerable anisotropy in their single-crystal elastic and plastic behaviour which has an impact on the performance of macroscopic polycrystalline engineering components.…”

Section: Resultsmentioning

confidence: 96%

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High-cycle fatigue behaviour and mechanism analysis of a forged TiZr-based alloy

Yue

Dai

Zhong

et al. 2016

Materials Science and Technology

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Fatigue resistance, particularly the endurance limit, is an important design consideration in engineering applications for TiZr-based alloys. The investigated Ti-20Zr-6Al-4 V (wt-%) alloy exhibited a high fatigue endurance limit of 775 MPa. Results showed that severe local stress concentration due to extensive dislocation pile-up at α/β interfaces was responsible for the crack initiation. A transition from a tensile mode to a shear mode crack was observed during crack propagation. Many striations as well as some micro-cracks which can improve the resistance to crack propagation exist in the stable crack-propagation region. A localised deviation between the crack-growth direction was also found, and this outcome combined with micro-cracks and tear ridge may be attributed to varied crystallographic orientations between different phases.

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Section: Resultsmentioning

confidence: 96%

“…From the perspective of fatigue crack initiation, the anisotropy of deformation can provide avenues for plastic strain concentration within contiguous slip bands, coupled with stain incompatibilities at certain interfaces, leading to stress concentration at those locations. 25,27,28…”

Section: Resultsmentioning

confidence: 99%