Static and fatigue characterization of the Ti5553 titanium alloy

Abstract

This paper presents and discusses static (elastoviscoplastic and damage) and high‐cycle fatigue characterization of two microstructures of the Ti5553 alloy. The difference between these two microstructures is related to their heat treatment and precisely to the temperature of the final aging. For each microstructure, several tests were carried out to identify their static and fatigue properties and the test results were correlated to the microstructure. A fractographic analysis of the rupture sections was performed in order to investigate the fracture mechanisms of the two microstructures. Finally, the fatigue properties of the two microstructures were compared with those found in results reported in the literature for two other classical titanium alloys used for aeronautical applications.

Effect of microstructure on high cycle fatigue behavior of Ti–5Al–5Mo–5V–3Cr–1Zr titanium alloy

“…The enhanced resistance to fatigue crack initiation is considered as a result of high strength of fine grains and α s precipitates that act as potential obstacles for dislocation motion. Thereby the formation of microcracks is inactive [22]. However, the increase of fatigue strength for BM is just a little as compared to the LM, which will be discussed later.…”

“…The probably most popular model is the Goodman model used for constant life diagrams [22]. The Goodman formula is as following:…”

Comparison of fatigue crack initiation behavior in different microstructures of TC21 titanium alloy

“…The effect of mean stress on fatigue can also be represented in terms of constant-life diagrams which are often used as a design consideration in engineering applications [9]. In most cases, the popular Goodman model is used for the constant life diagrams [9,13,26]. In general, the Goodman formula can be expressed as: (…”

Microstructure and Mechanical Properties of Ti5553 Butt Welds Performed by LBW under Conduction Regime

“…It is a variation of the alloy VT22, being an alternative to the Ti-10-2-3 alloy. The advantage of this alloy as compared to other β titanium alloys is the sluggish precipitation kinetics of the α phase [5,6]. Ti5553 offers high strength, excellent hardenability, fracture toughness as well as high fatigue resistance [7].…”