Study of the influence of pulse heating on the structure and properties of reinforcing fibers from tungsten-rhenium alloys

Abstract

Improvement of the design of modern heat engines is characterized by expanding the use of heat-resistant fiber composites. The component that largely determines the strength and technological properties of the composite is the fibers. Currently the requirements for the strength and technological properties of reinforcing fibers are quite fully met by wires made of various tungsten-rhenium and molybdenum-rhenium alloys. A promising method for forming a composite material is the pulse heating method, which, if the parameters are set irrationally, can lead to a decrease in the properties of reinforcing fibers made of tungsten-rhenium or molybdenum-rhenium wire. Therefore, in this work, we studied the effect of pulse heating parameters on the properties of reinforcing fibers from various tungsten-rhenium and molybdenum-rhenium alloys. It was found that reinforcing fibers made of tungsten-rhenium alloy containing about 5 % rhenium become brittle after pulse heating to temperatures above 2000 °C, which does not allow the formation of a defect-free structure of the composite material. Reinforcing fibers made of tungsten-rhenium alloys containing about 27 % rhenium remain plastic up to melting temperatures, which allows the formation of a defect-free structure of the composite material.

Keywords

• Composite
• Fibers
• Formation process
• Pulse heating
• Structure
• Properties