Scientists have conducted a series of studies on the mechanical properties and flame retardancy of laser formed Ti40 flame-retardant titanium alloy

Recently, Professor Huang Chunping's team from Nanchang University of Aeronautics and Astronautics conducted a series of studies on the mechanical and flame retardant properties of laser formed Ti40 flame retardant titanium alloy. The research team used typical Ti40 flame-retardant titanium alloy as the research object and prepared Ti40 flame-retardant titanium alloy using LSF technology. The microstructure, mechanical properties, and flame retardancy of laser formed specimens and traditional forged specimens were studied. 

At the same time, the superior flame retardancy and mechanical properties of laser formed specimens compared to traditional forged specimens were studied and discussed. The relevant research results are published in the Journal of Manufacturing Processes under the title of "Achieving superior burn resistance and mechanical properties of Ti40 alloy by laser solid forming". The author of the paper is Huang Qimin, a master's student, and the corresponding authors are Dr. Liu Fenggang and Professor Huang Chunping.

Ti40 (Ti-15V-25Cr) flame-retardant titanium alloy is a new type of highly stable β Titanium alloy has excellent comprehensive mechanical properties and flame retardancy, and is widely used in high bypass ratio large engine fan compressor components and other structures. However, its high temperature plasticity and flowability are poor, resulting in high processing costs, long cycles, and low material utilization in traditional mechanical processing. 

Therefore, there is an urgent need to find a new manufacturing technology to improve these issues. With the development of additive manufacturing technology, laser solid forming (LSF) technology based on laser cladding and rapid prototyping has also been widely applied. It can directly manufacture parts from CAD models and repair damaged parts, bringing new ideas and methods for the processing and manufacturing of flame retardant titanium alloys.

Based on the above research, the LSF process has improved the problems of high processing cost, long cycle time, and low material utilization brought about by traditional mechanical processing of Ti40. Ti40 alloy prepared by laser stereoforming technology has better mechanical properties compared to forged parts. At the same time, due to the special tempering effect during the laser stereoforming process, the Ti40 alloy β The precipitation of Ti5Si3 with high melting point can not only improve the oxidation efficiency of V and Cr elements by retaining pores, but also slow down the peeling of the oxide layer by strengthening the bonding between the matrix and the oxide layer, improving the flame retardancy of Ti40. The study of the mechanical properties and flame retardancy of Ti40 alloy prepared by LSF technology provides a new technical means for achieving high-performance, fast, and low-cost preparation of complex structural components of flame retardant titanium alloy.

Source: Laser Manufacturing Network