Effect of microstructure on the fatigue properties of Ti–6Al–4V titanium alloys

Abstract

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A Review of the As-Built SLM Ti-6Al-4V Mechanical Properties towards Achieving Fatigue Resistant Designs

“…The comprehensive study of Wu et al [69] revealed that a finer grain size is able to improve the HCF behaviour of the material, which is consistent with the previously presented understanding with respect to improving crack initiation resistance. However, the long crack growth analysis showed a preference to the lamellar microstructure, particularly with respect to coarser lamellae width.…”

“…This is due to the fact that different build directions have the maximum resolved shear direction at different orientations to planes which contain the easiest and most common slip systems [54]. In a comprehensive analysis of the HCF results of wrought Ti-6Al-4V, obtained from 21 different published research results, it was shown by Wu et al [69] that a bimodal microstructure will have superior HCF resistance over a lamellar microstructure, followed by a equiaxed microstructure. Analysis of the primary α content in the bimodal microstructure demonstrated the importance of having a primary α volume fraction of between 30-50% and a primary α size of between 0 and 5 µm to achieve the highest fatigue resistance.…”

Cycle numbers to failure for magnesium and its alloys in human body fluid

“…Furthermore, it has been discovered that the factors which increase the tensile strength, can also improve the fatigue strength as well (Hosseini, 2012). In addition, in 2013, "effect of microstructure on the fatigue properties of Ti-6Al-4V Titanium alloys" is recommended by Wu et al (2013).…”

Phase constituents and microhardness of laser alloyed Ti–6Al–4 V alloy

“…Accordingly, titanium alloys (Ti-6Al-4 V, in particular) find extensive applications in the aeronautical, medical, aerospace, chemical, petrochemical, marine, and engineering industries for manufacturing critical systems such as airfoils, undercarriage components, and airframes. [1][2][3][4] However, in spite of these numerous laudable properties, the engineering applications of titanium alloys are often limited due to poor wear resistance, low hardness, high friction coefficient, low hardenability, and the tendency to gall and smear. [5][6][7] It is therefore imperative to develop methods that will remove these limitations, improve and enhance the surface properties of titanium and its alloys while retaining the desirable bulk properties.…”