Abstract
Ti65 alloy (Ti-5.8Al-4.0Sn-3.5Zr-0.5Mo-0.4Si-0.3Nb-1.0Ta-0.8W-0.05C) is the newly developed high temperature titanium alloy optimized from Ti60 alloys. The long-term service temperature of the alloy is as high as 650 °C, which is unattainable with the previous high temperature titanium alloy. It has excellent strength and excellent creep resistance, and has great application prospects in the aerospace industry. In the current study, the evolution of microstructure and texture of Ti65 alloy sheets developed by unidirectional rolling (UDR) and cross rolling (CR) followed by solution and aging treatment was investigated. The microstructure of the UDR sample consists of equiaxed , lamellar and few elongated , and the texture is the combination of minor B-type and major T-type texture, with the main component of basal {0001} fiber texture and , respectively. Due to more active slip system resulted by transformed direction, the microstructure of the CR sample consists of more elongated , and the <0001> texture characterized as R-type texture forms in addition to B/T-type texture. With aging temperature increasing, the microstructures for both transform to duplex microstructure, and the thicknesses of lamellar increase. B-type texture becomes stronger, while T/R-type texture are weakened, which is caused by the combination of recrystallization, spheroidization, and variant selection. An abnormal increasing of T/R-type texture but constant B-type texture happens in the CR-600 sample, which is related to high recrystallization fraction. It is expected that the research results can provide useful references for the rolling of high temperature titanium alloy sheets and the precise control of microstructure/texture.
Highlights
High temperature titanium alloys play a significant role in the aviation and aerospace industry due to low density, high strength, excellent corrosion resistance, and high temperature resistance at service temperature [1,2,3]
The evolution of microstructure and texture of the new high temperature Ti65 alloy sheets developed by unidirectional rolling (UDR) and cross rolling (CR) process and followed by solution and aging treatment was investigated
The following conclusions can be drawn: (1) The microstructure of the UDR sample consists of equiaxed αp, lamellar αs, and few elongated αp
Summary
High temperature titanium alloys (such as IMI834, Ti-1100, Ti6242, etc.) play a significant role in the aviation and aerospace industry due to low density, high strength, excellent corrosion resistance, and high temperature resistance at service temperature [1,2,3]. The microstructure and texture evolution mechanisms need to be paid much attention, which can provide theoretical support for the sheet rolling deformation of high temperature titanium alloys. To clarify the evolution mechanism of microstructure and texture and were used to systematically characterize and analyze the microstructure and texture characteristics so on achieving precise control of microstructure and texture, the systematic studies of Ti65 alloy of the alloy sheets These will further promote understanding of the study, effects Ti65 of rolling during hot deformation andstudies subsequent heat treatment arethe necessary. Ti65 alloy sheets, sheets are obtained by two different rolling modes, namely unidirectional rolling (UDR) and cross and provide for the processing and production of optical high temperature titanium rolling (CR), technical followedguidance by solution andactual subsequent aging treatment. Nova field emission electron direction) the rolledCorporation, sheet are shown inJapan)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
