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Micromechanics-Based Damage Analysis of Fracture in Ti5553 Alloy with Application to Bolted Sectors

Article dans une revue avec comité de lecture
Author
ccBEN BETTAIEB, Mohamed
193496 ArGEnCo Department, MS2F Division [ArGEnCo]
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
VAN HOOF, Thibaut
97195 Cenaero
MINNEBO, Hans
97195 Cenaero
PARDOEN, Thomas
DUFOUR, Philippe
JACQUES, Pascal J.
HABRAKEN, Anne-Marie
193496 ArGEnCo Department, MS2F Division [ArGEnCo]

URI
http://hdl.handle.net/10985/10046
DOI
10.1007/s11665-015-1383-7
Date
2015
Journal
Journal of Materials Engineering and Performance

Abstract

A physics-based, uncoupled damage model is calibrated using cylindrical notched round tensile specimens made of Ti5553 and Ti-6Al-4V alloys. The fracture strain of Ti5553 is lower than for Ti-6Al-4V in the full range of stress triaxiality. This lower ductility originates from a higher volume fraction of damage sites. By proper heat treatment, the fracture strain of Ti5553 increases by almost a factor of two, as a result of a larger damage nucleation stress. This result proves the potential for further optimization of the damage resistance of the Ti5553 alloy. The damage model is combined with an elastoviscoplastic law in order to predict failure in a wide range of loading conditions. In particular, a specific application involving bolted sectors is addressed in order to determine the potential of replacing the Ti-6Al-4V by the Ti5553 alloy.

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