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- Title
VHCF response of Gaussian specimens made of high-strength steels: comparison between unrefined and refined AISI H13.
- Authors
Tridello, A.
- Abstract
It is well-known in the literature that the characteristic defect size of high-strength steels strongly influences their Very-High-Cycle Fatigue (VHCF) response. Currently, several refining processes permit to reduce the characteristic defect size and permit to remove large defects in high-strength steels, thus inducing a possible significant enhancement of the VHCF response. The present paper investigates the effects of a specific refinement process, the Electro-Slag Remelting (ESR), on the VHCF response of an AISI H13 steel. Ultrasonic VHCF tests are carried out on large Gaussian specimens made of unrefined and refined AISI H13 steels. Fracture surfaces are investigated to compare inclusion populations before and after the ESR process. Finally, the fatigue limit and the design S-N curves are statistically estimated to quantify the beneficial effects induced by the ESR process.
- Subjects
HIGH strength steel; ELECTROSLAG process; MATERIAL fatigue; GAUSSIAN function; TENSILE strength
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2017, Vol 40, Issue 10, p1676
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.12610