BLT-Ti65, the next generation high temperature titanium alloy for high performance applications
date： 2024-07-23
Ti65 material is a multi-component near α type high temperature http://www.dafustock.com/en/category/152.aspx, it can maintain good strength, plasticity, creep resistance, corrosion resistance and thermal stability at 650℃ high temperature, far higher than the use of traditional high temperature titanium alloy temperature limits, in aerospace, chemical equipment, Marine engineering and other high-performance applications favored.
However, the use of additive manufacturing to process Ti65 powders often produces defects such as pores and cracks in unfused, unmelted、partially melted powder particles, intertrack、interlayer delamination, which, as a stress concentration site, will increase the probability of material failure, induce material failure (fracture), and adversely affect the performance of the formed part.
BLT-Ti65 powder for selective laser melting forming (SLM) and directed Energy Deposition (DED) has been developed by Platite powder development engineers to address this problem.
The nominal chemical composition of BLT-Ti65 powder is Ti-5.9Al-4Sn-3.5Zr-0.3Mo-0.4Si-0.3Nb-2.0Ta-1.0W-0.05C, and the specifications are 15-53μm (suitable for SLM process), 75-180μm (suitable for DED process). After heat treatment, the yield strength of the parts produced by 15-53μm BLT-Ti65 powder can reach 483-503Mpa, the tensile strength can reach 604-624Mpa, and the elongation can reach 16.5%-26.5% at 650℃. The parts produced by 75-180μm BLT-Ti65 powder can reach 478-538Mpa, tensile strength can reach 588-648Mpa, and elongation can reach 22%-32% at 650℃ high temperature.
BLT-Ti65 cracking and deformation control, printing process control and other problems have been overcome, and BLT-Ti65 formable process plan and forming parameters have been developed, which can be applied to all types of equipment in the market of BLT-TI65.
The domestic development of high temperature titanium alloys started late, and the development of high temperature titanium alloys suitable for additive manufacturing technology is still in an initial stage.
By optimizing the composition of Ti65, optimizing the forming process parameters and controlling the forming process, BLT-Ti65 has been successfully developed and verified its forming ability, which will provide more possibilities for the application of high temperature titanium alloy in high temperature resistant parts of aeroengines, and scientific experiments on new materials and new structures.
However, the use of additive manufacturing to process Ti65 powders often produces defects such as pores and cracks in unfused, unmelted、partially melted powder particles, intertrack、interlayer delamination, which, as a stress concentration site, will increase the probability of material failure, induce material failure (fracture), and adversely affect the performance of the formed part.
BLT-Ti65 powder for selective laser melting forming (SLM) and directed Energy Deposition (DED) has been developed by Platite powder development engineers to address this problem.
The nominal chemical composition of BLT-Ti65 powder is Ti-5.9Al-4Sn-3.5Zr-0.3Mo-0.4Si-0.3Nb-2.0Ta-1.0W-0.05C, and the specifications are 15-53μm (suitable for SLM process), 75-180μm (suitable for DED process). After heat treatment, the yield strength of the parts produced by 15-53μm BLT-Ti65 powder can reach 483-503Mpa, the tensile strength can reach 604-624Mpa, and the elongation can reach 16.5%-26.5% at 650℃. The parts produced by 75-180μm BLT-Ti65 powder can reach 478-538Mpa, tensile strength can reach 588-648Mpa, and elongation can reach 22%-32% at 650℃ high temperature.
BLT-Ti65 (15-53μm) material was used to produce the cabin wing demonstration sample, which is a typical structure of cabin wing integrated manufacturing.
The forming sample is compact and has no obvious defects, demonstrating the SLM forming ability of BLT-Ti65 material.
BLT-Ti65 cracking and deformation control, printing process control and other problems have been overcome, and BLT-Ti65 formable process plan and forming parameters have been developed, which can be applied to all types of equipment in the market of BLT-TI65.
The domestic development of high temperature titanium alloys started late, and the development of high temperature titanium alloys suitable for additive manufacturing technology is still in an initial stage.
By optimizing the composition of Ti65, optimizing the forming process parameters and controlling the forming process, BLT-Ti65 has been successfully developed and verified its forming ability, which will provide more possibilities for the application of high temperature titanium alloy in high temperature resistant parts of aeroengines, and scientific experiments on new materials and new structures.
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