High cycle fatigue and fracture behavior of Ti-5Al-5Mo-5V-3Cr alloy with BASCA and double aging treatments

In this article, the authors discuss the results of studies into the processing of Ti-5Al-5Mo-5V-1Cr-1Fe near-β titanium alloy (Ti-55511) by electron beam melting (EBM), an additive manufacturing technique. Due to its high flexibility in shaping mechanical properties, Ti-55511 alloy is commonly used in aircraft components such as landing gear or airframes. In this study, Ti-55511 powder was used and its properties were described as regards chemical composition and particle size distribution in order to assess its suitability for EBM processing and repeatability of results. 20 sets of processing parameters were tested in the energy input range between 10 J/mm3 and 50 J/mm3 (cathode current, 4.5 mA-19.5 mA; scanning speed, 1080 mm/s–23400 mm/s). Four types of top surfaces were obtained, namely, flat, orange peel, with single pores, and with swelling. Best results were obtained for the energy of 30 J/mm3: flat top surface and relative density in excess of 99.9%. Analysis of chemical composition showed that aluminum loss was below the specification minimum for the analyzed parameter sets. Scanning speed most significantly affected aluminum content: the lower the scanning speed, the higher the aluminum loss. Analysis of microstructures showed the dependence of lamellar α-phase volume fraction on the process parameters used. For low scanning speed, the determined α-phase volume accounted for about 78%. Higher scanning speed resulted in a decrease of the α-phase content to 61%. The dimensions of the lamellas and the amount of the α-phase strongly effected hardness results (360 HV to 430 HV).

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“…Standard heat treatment temperature profiles of BASCA and DA for β and near- β titanium alloys [30] in comparison with EBM temperature profile.…”

Section: Figurementioning

confidence: 99%

“…Microstructures of Ti-55511 alloy under two conditions: (a, b) cast by VAR method and hot rolled and (c) after BASCA heat treatment [30]. …”

Section: Figurementioning

confidence: 99%

The Effect of EBM Process Parameters on Porosity and Microstructure of Ti-5Al-5Mo-5V-1Cr-1Fe Alloy

et al. 2019

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“…This has been attributed to typical commercial heat treatment given to the alloy Ti-1023 i.e. solution treatment in α + β phase field followed by water quenching [10][11][12][13][14][15][16][17][18]. On the other hand, optimum properties of the alloy Ti-5553 has been achieved in air cooled condition after solution treatment in α + β phase field.…”

Section: Introductionmentioning

confidence: 99%

Development of α precipitates in metastable Ti-5Al-5Mo-5V-3Cr and similar alloys

Manda

Singh

Chakkingal

et al. 2016

Materials Characterization

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“…Furthermore, serious stress concentration due to the decreasing drastically of effective load area near the crack tip will produce local plastic deformation and lead to crack propagation more easily. When the crack length reaches to the critical size and the local stress exceeds the fracture strength of material, crack growth rate increases rapidly and ultimate fracture failure occurs [28][29][30].…”

Section: Discussionmentioning

confidence: 99%

Effect of fretting wear on very high cycle bending fatigue behaviors of FV520B steel

Song¹,

Wang²,

Xu³

et al. 2016

Tribology International

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High cycle fatigue and fracture behavior of Ti-5Al-5Mo-5V-3Cr alloy with BASCA and double aging treatments

Cited by 35 publications

References 15 publications

The Effect of EBM Process Parameters on Porosity and Microstructure of Ti-5Al-5Mo-5V-1Cr-1Fe Alloy

The Effect of EBM Process Parameters on Porosity and Microstructure of Ti-5Al-5Mo-5V-1Cr-1Fe Alloy

Development of α precipitates in metastable Ti-5Al-5Mo-5V-3Cr and similar alloys

Effect of fretting wear on very high cycle bending fatigue behaviors of FV520B steel

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